The Home Depot 357 cc EFI OHV Horizontal Shaft Engines Instruction Manual

The Home Depot 357 cc EFI OHV Horizontal Shaft Engines

Record Product Information
Before setting up and operating your new engine, please locate the model plate and record the information in the provided area to the right. This information will be necessary, should you seek technical support via our web site, Customer Support Department, or with a local authorized service dealer.

WARNING
Read and follow all safety rules and instructions in this manual before attempting to operate. Failure to comply with these instructions may result in personal injury – SAVE THESE INSTRUCTIONS.

WARNING
CALIFORNIA PROPOSITION 65
Engine exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to State of California to cause cancer and birth defects or other reproductive harm.

NOTE: This Operator’s Manual covers several models. Features may vary by model. Not all features in this manual are applicable to all models and the model depicted may differ from yours.

Form No. 769-26925 (November 15, 2023)

SAFE OPERATION PRACTICES

WARNING
This symbol points out important safety instructions which, if not followed, could endanger the personal safety and/or property of yourself and others. Read and follow all instructions in this manual before attempting to operate. Failure to comply with these instructions may result in personal injury. When you see this symbol, HEED ITS WARNING!

DANGER
This engine was built to be operated according to the safe operation practices in this manual. As with any type of power equipment, carelessness or error on the part of the operator can result in serious injury. Failure to observe the following safety instructions could result in serious injury or death.

TRAINING

1. Read, understand and follow all warnings and instructions on the engine and the equipment, and in the operator’s manuals before attempting to install and/or operate. Keep this manual in a safe place for future and regular reference and for ordering replacement parts.
2. Be familiar with all controls and their proper operation. Know how to stop the engine and disengage them quickly.
3. Never allow children under 14 years of age to operate the equipment. Children 14 and over should read and understand the warnings and instructions both on the product and in the manuals and be trained and supervised by an adult.
4. Never allow adults to operate the equipment without proper instruction.
5. Keep the area of operation clear of all persons, particularly small children and pets. Stop the engine if anyone enters the area.

PREPARATION

1. Wear sturdy, rough-soled work shoes and close fitting slacks and shirts. Loose fitting clothes or jewelry can be caught in the moving parts. Never operate the equipment in bare feet or sandals.
2. Disengage all powered clutch and drive control levers on the equipment before starting the engine.
3. Never leave the engine running while unattended.
4. Never attempt to make any adjustments while the engine is running, except where specifically recommended in the operator’s manual(s).

SAFE HANDLING OF GASOLINE:
To avoid personal injury or property damage, use extreme care in handling gasoline. Gasoline is extremely flammable and the vapors are explosive. Serious personal injury can occur when gasoline is spilled on yourself and/or your clothes which can ignite. Wash your skin and change clothes immediately.

1. When adding fuel, turn engine OFF and let engine cool at least 5 minutes before removing the fuel cap.
2. Fill fuel tank outdoors or in well ventilated area.
3. Use only an approved fuel container.
4. Never fill containers inside a vehicle or on a truck or trailer bed with a plastic liner. Always place containers on the ground away from your vehicle before filling.
5. If possible, remove equipment from the truck or trailer and refuel it on the ground. If this is not possible, then refuel equipment on a trailer with a portable container, rather than from a fuel pump dispenser nozzle.
6. Keep the nozzle in contact with the rim of the fuel tank or container opening at all times until fueling is complete. Do not use a nozzle lock-open device.
7. Do not overfill fuel tank. Fill tank to full as indicated by the fuel level indicator installed inside the fuel tank to allow space for fuel expansion. On some models, a fuel level indicator may NOT be present, in this instance, fill the tank no more than 1/2 inch below the bottom of the filler neck to allow space for fuel expansion.
8. Replace fuel cap and tighten securely.
9. If fuel is spilled, wipe it off the engine and the equipment. Move equipment to another area and wait 5 minutes before starting the engine.
10. To reduce fire hazards, keep the engine and equipment free of grass , leaves or other debris build up. Clean up oil or fuel spillage and remove any fuel-soaked debris.
11. Keep fuel away from sparks, open flames, pilot lights, heat, and other ignition sources.
12. Never fuel equipment indoors because flammable vapors will accumulate in the area.
13. Extinguish all cigarettes, cigars, pipes, and other sources of ignition.
14. Check fuel line, tank, cap, and fittings frequently for cracks or leaks. Replace if necessary.

OPERATION

1. When starting the engine, make sure spark plug, muffler, and fuel cap are in place.
2. Do not crank engine with spark plug removed.
3. If fuel is spilled, wipe it off the engine and the equipment. Move equipment to another area and wait 5 minutes before starting the engine.
4. Allow engine and muffler to cool before touching.
5. Keep small children away from hot or running engines. They are unaware of the dangers and can suffer burns from the engine and muffler.
6. Remove any accumulated debris from the engine cylinder and muffler areas.
7. Operate equipment with all shields and guards in place.
8. Keep hands and feet away from rotating parts.
9. Wear sturdy, rough-soled work shoes and close-fitting slacks and shirts. Loose fitting clothes, jewelry and long hair can be caught in moving parts. Shirts and pants that cover the arms and legs and steel-toed shoes are recommended.
10. When starting the engine with the recoil starter, pull handle slowly until resistance is felt, then pull rapidly, repeat if necessary.
11. Remove all equipment engine loads before starting engine.
12. Direct coupled equipment components such as, but not limited to blades, impellers, pulleys, sprockets, etc., must be securely attached.

MAINTENANCE & STORAGE

1. Keep the engine and equipment in safe working condition.
2. Allow the engine to cool at least 5 minutes before storing equipment. Never tamper with safety devices. Check their proper operation regularly.
3. Check bolts and screws for proper tightness at frequent intervals to keep the engine and equipment in safe working condition. Visually inspect them for any damage.
4. Before cleaning, repairing or inspecting; stop the engine and make certain all moving parts have stopped. Disconnect the spark plug wire and ground it against the engine to prevent unintended starting.
5. Do not change the engine governor settings or over-speed the engine. The governor controls the maximum safe operating speed of the engine.
6. Maintain and replace safety and instruction labels as necessary.
7. Always refer to the operator’s manuals for important details if the equipment is to be stored for an extended period of time.
8. If the fuel tank has to be drained, do this outdoors.
9. Observe proper disposal laws and regulations for fuel, oil, etc. to protect the environment.

DO NOT MODIFY ENGINE
To avoid serious injury or death, do not modify engine in any way. Tampering with the governor setting can lead to a runaway engine and cause it to operate at unsafe speeds. Never tamper with factory setting of engine governor.

NOTICE REGARDING EMISSIONS
Engines which are certified to comply with California and federal EPA emission regulations for SORE (Small Off Road Equipment) are certified to operate on regular unleaded gasoline, and may include the following emission control systems: Engine Modification (EM), Oxidizing Catalyst
(OC), Secondary Air Injection (SAI) and Three Way Catalyst (TWC) if so equipped.

INTENDED USE:
The engine models listed on the cover of this manual are specifically designed and intended for use on designated outdoor power equipment only. The engine models listed also have been approved for use as replacement engines for products such as snow throwers, log splitters, tillers, chipper/shredders and wheeled blowers. These engines are not approved for use in other applications. Engines used in non-approved applications or subjected to any modifications or misuse will void the engine warranty.

WARNING
Failure to use an engine as intended and as instructed may lead to property damage, personal injury or death.

ENGINE REPLACEMENT:
Please check your equipment specifications for important specific engine information, such as engine size (cc), type of shaft (horizontal or vertical) crank shaft dimensions, mounting bolt pattern, engine speed (rpm), oil capacity, fuel tank size, controls (throttle/choke), starting (recoil or electric), shut down capabilities, accessory wiring needs and other emission related specifications.

WARNING
Any equipment equipped with an internal combustion engine should not be used on or near any unimproved forest-covered, brush covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrestor meeting applicable local or state laws (if any).

If a spark arrestor is used, it should be maintained in effective working order by the operator. In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrestor for the muffler is available through your nearest engine authorized service dealer or contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019.

SAFETY SYMBOLS

This page depicts and describes safety symbols that may appear on the engine. Read, understand, and follow all warnings and instructions on the engine and equipment, along with the operator’s manuals before attempting to install and/or operate.

• WARNING – READ THE OPERATOR’S MANUAL(S)
  Read, understand and follow all the safety rules and instructions in the manual(s) and on the equipment before attempting to operate. Failure to comply with this information may result in personal injury or death. Keep the manual(s) in a safe location for future and regular reference.

• DANGER — CARBON MONOXIDE
  Never run an engine indoors or in a poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas.

• DANGER — ELECTRICAL SHOCK
  Do not use the engine’s electric starter in the rain.

• WARNING—GASOLINE IS FLAMMABLE
  Allow the engine to cool at least 5 minutes before refueling.

• WARNING— ELECTRICAL SHOCK
  Do not charge snow blower in rain or wet locations. Do not spray battery case/battery with water.

• WARNING— AVOID BURN INJURY
  The muffler and engine become very hot and can cause serious burn injuries. Do not touch. Allow the equipment to cool for at least 5 minutes before storing or attempting any service.

WARNING
Your Responsibility— Restrict the use of the equipment to persons who read, understand and follow all warnings and instructions on the engine and the equipment, and in the operator’s manuals. – SAVE THESE INSTRUCTIONS!

SET-UP

Fuel & Oil
IMPORTANT: The engine is shipped without fuel in the engine. See the following instructions for adding fuel.
IMPORTANT: Some engines are shipped with oil already in the engine. It is very important to check the oil level and to add oil, if necessary. Running the engine with insufficient oil can cause serious engine damage and void the engine warranty.

OIL RECOMMENDATIONS
Before starting engine, fill with motor oil, capacity is 1100 ml/37.2 oz. Refer to viscosity chart in Figure 1 for oil recommendations. Do not over- fill. Use a 4-stroke, or an equivalent high detergent, premium quality motor oil certified to meet or exceed U.S. automobile manufacturer’s requirements for service classification of a minimum level SJ (higher letter ratings are acceptable such as SL and SM grades). Motor oil will display this designation on the container.
NOTE: Do not use non-detergent oil or 2-stroke engine oil. It could shorten the engine’s service life.

CAUTION
Do not use non-detergent oil or 2-stroke engine oil. It could shorten the engine’s service life.

CHECKING OIL LEVEL/ADDING OIL
NOTE: Be sure to check the oil while on a level surface with the engine off.
NOTE: To install or remove the oil fill cap, rotate 1/4 turn or push/pull it from the oil fill neck.

To avoid engine damage, it is important to:

• Check oil level before each use and every 5 operating hours when engine is warm. Check oil level more frequently during engine break-in.
• Keep oil level between “H” and “L” marks on dipstick (Figure 2).
• Be sure oil fill cap is installed securely when checking.

1. Remove the oil fill cap and wipe the dipstick clean (Figure 2).
2. Insert the oil fill cap back into the oil fill neck and securely fasten.
3. Loosen and remove the oil fill cap from the oil fill neck. Note the oil level, if oil reading on the dipstick is below the “L” mark, slowly add oil to reach the “H” level (Figure 2).
4. Replace the oil fill cap into the oil fill neck and securely fasten before starting engine.
   NOTE: Do not overfill. Overfilling with oil may cause smoking, hard starting, or spark plug fouling.
   NOTE: DO NOT allow oil level to fall below the “L” mark on the dipstick. Doing so may result in equipment malfunctions or damage.
   NOTE: To change the oil on your engine, see Changing the Oil on page 12.

FUEL REQUIREMENTS

CAUTION
Operating the engine with E15 or E85 fuel, an oil/gasoline mixture, dirty gasoline, or gasoline over 30 days old without fuel stabilizing additive may result in damage to your engine’s carburetor. Subsequent damage would not be covered under the manufacturer’s warranty.

Use automotive gasoline (unleaded or low leaded to minimize combustion chamber deposits) with a minimum of 87 octane. Gasoline with up to 10% ethanol (E10) or 15% MTBE (Methyl Tertiary Butyl Ether) can be used. Never use an oil/gasoline mixture or dirty gasoline. Avoid getting dirt, dust, or water in the fuel tank. DO NOT use E15 or E85 gasoline.

WARNING
Gasoline is extremely flammable and is explosive under certain conditions.

• Refuel in a well-ventilated area with the engine off and allowed to cool. Do not smoke or allow flames or sparks in the area where the engine is refueled or where gasoline is stored.
• Do not overfill the fuel tank. After refueling, make sure the fuel cap is closed properly and securely.
• If fuel is spilled, wipe it off the engine and the equipment. Move equipment to another area and wait five minutes before starting the engine.
• Avoid repeated or prolonged contact with skin or breathing of vapor.

WARNING
An adult should fuel this engine. NEVER allow children to refuel the engine. Gasoline (fuel) vapors are highly flammable and can explode. Fuel vapors can spread and be ignited by a spark or flame many feet away from engine. To prevent injury or death from fuel fires, follow these instructions:

• DO NOT use leaded fuel.
• Fuel must be fresh and clean. NEVER use fuel left over from last season or stored for long periods.
• NEVER mix oil with fuel.
• DO NOT use fuel containing Methanol (Wood Alcohol)NOTES: When connecting power cord always connect power cord to electric starter inlet on engine first; then into outlet (Figure 3).
  Determine what type of power source outlet you will be connecting the power cord to, before you start your engine. See Engines with Electric Starters instructions in the Operation Section of this manual.
  NOTE: Before refueling, allow engine to cool for at least 5 minutes.

1. Be sure engine is outdoors and in a well-ventilated area.
2. Clean area around the fuel fill cap and remove the fuel cap.
3. Use an approved red GASOLINE container, add fuel slowly, being careful to avoid spilling.
4. Fill fuel tank until fuel reaches 1⁄2 inch below the bottom of the filler neck to allow space for fuel expansion. Be careful not to overfill.
5. Replace the fuel cap and tighten securely. Wipe up spilled fuel before starting engine. If fuel is spilled DO NOT start engine. Move equipment away from area of spillage. Avoid creating any source of ignition until fuel vapors are gone.
6. Be sure fuel shut-off valve, if present, is open in the “on” position.

CHARGE BATTERY
The battery must have enough charge to power the Electronic Fuel Injection (EFI) system before starting the engine. If necessary, charge battery before operation. Refer to Charging The Battery in the Maintenance Section of this Manual.
NOTE: Battery supplies power to the EFI system only. The battery is not used to start the engine.

ELECTRICAL POWER

WARNING
DO NOT pull recoil starter with engine running. Doing so may VOID YOUR WARRANTY.

CAUTION
The extension cord can be any length, but must be rated for 15 amps at 125 volts, grounded and rated for outdoor use.

NOTES: When connecting power cord always connect power cord to electric starter inlet on engine first; then into outlet (Figure 3).
Determine what type of power source outlet you will be connecting the power cord to, before you start your engine. See Engines with Electric Starters instructions in the Operation Section of this manual.

OPERATION

Features

• A. OIL DRAIN PLUG
  Removing the oil drain plug will drain the oil from the engine.

• B. OIL FILL CAP & DIPSTICK
  Remove the oil fill cap & dipstick to check the oil level and add oil.

• C. FUEL CAP
  Remove the fuel cap to add fuel.

• D. RECOIL STARTER HANDLE
  Pull the recoil starter handle to start the engine.

• E. SPEED CONTROL KNOB
  Change engine speed setting based on required performance.

• F. ON/OFF KEY
  Two-position key to be used to power the Electronic Fuel Injection (EFI) system when turned to the ON position. Rotate to “ON” position and pull recoil handle to start engine.

• G. READY LIGHT
  Green power indicator light (ready light) will illuminate when power is supplied to the Electronic Fuel Injection (EFI) system and the engine is ready to start.

• H. SERVICE LIGHT
  Used to determine engine system fault and provide diagnostic information.

• I. BATTERY BOX
  Contains the Electronic Fuel Injection (EFI) system battery.
  The battery must have enough charge to power the Electronic Fuel Injection (EFI) system before starting the engine. If necessary, charge battery before operation. Refer to Charging The Battery in the Maintenance Section of this Manual.
  NOTE: Battery supplies power to the EFI system only. The battery is not used to start the engine.

• J. BATTERY CHARGER
  See Charging EFI Battery in the Maintenance Section.

• K. FACTORY FILL & DRAIN (IF EQUIPPED)
  DO NOT USE – this port is used by the manufacturing factory only.

• L. ELECTRIC STARTER INLET (IF EQUIPPED)
  Requires the use of a three-prong outdoor extension cord and a 120V power source/wall outlet.

• M. ELECTRIC START BUTTON (IF EQUIPPED)
  Pressing the button on the top of the electric starter switch engages the engine’s electric starter when plugged into a 120V power source.

Pre-Operation Check

IMPORTANT: The engine is shipped without fuel in the engine. See the Set- Up section of this manual for instructions on adding fuel.

IMPORTANT: Some engines are shipped with oil already in the engine. It is very important to check the oil and add oil if necessary. Running the engine with insufficient oil can cause serious engine damage and void the engine warranty. See Checking Oil Level/Adding Oil on page 5.
For your safety, and in order to maximize the service life of this engine, it is very important to check its condition before starting. Make certain to service, correct or fix any problem that might be identified before attempting to operate.

WARNING
Improperly maintaining this engine, or failure to correct any problem before operation can cause a malfunction which could result in serious injury or even death.
Always perform a pre-operation inspection before each use, and correct any problem.

Before you start the engine, always check the following items:

1. Checking Oil Level/Adding Oil on page 5.
2. Fuel Requirements on page 6.
3. General overall inspection. Check for any fluid leaks or any loose or damaged parts.
4. Check the operator’s manual provided with the equipment that is powered by this engine. Review the operator’s manual for any precautions and procedures that should be followed before starting the engine.

Starting the Engine

WARNING
Never allow children under 14 years of age to operate the equipment. Children 14 and over should read and understand the warnings and instructions both on the equipment and in the manuals and be trained and supervised by an adult.

WARNING
If you are unable to start this engine after following instructions in this manual, contact your authorized MTD Service Dealer. To avoid serious burn injuries or damage to your engine, DO NOT attempt to start or troubleshoot the engine as listed below:

• DO NOT use starting fluid.
• DO NOT spray flammable vapors into the carburetor.
• DO NOT put flammable liquids into carburetor.
• DO NOT operate engine or pull on recoil starter with spark plug removed. Fuel can spray from spark plug hole and ignite.

NOTE: Allow the engine to warm up for a few minutes after starting. The engine will not develop full power until it reaches normal operating temperatures.
Familiarize yourself with the engine symbols shown in Figure 5 before attempting to start engine. If engine is remotely controlled by the equipment it is powering, be sure to familiarize yourself with the equipment Operator’s Manual as well.

ON/OFF KEY
The on/off key provides power to the Electronic Fuel Injection
(EFI) system to prepare the engine to start.
Insert the on/off key and turn to the ON position. The ready light will light showing the engine is ready to be started (Figure 5).

IMPORTANT: If the service light comes on or both the ready light and service light remain off charge the battery (see Charging the Battery in the Maintenance Section of this manual). The engine will not start unless the battery is charged.
NOTE: if using the electric starter, ensure the grounded extension cord is plugged into the electric starter inlet and grounded outlet before inserting the on/off key.

NOTE: The following starting instructions are for several different types of engines. In order to locate the instructions that apply to your engine, first determine what type of starter you have. If you have an electric starter, see Engines With Electric Starters. If you have a manual recoil starter, see Engines with Recoil Starters later in this section.

Engines With Electric
Starters
If you have a manual recoil starter, see Engines with Recoil Starters later in this section.

WARNING
DO NOT pull recoil starter with engine running. Doing so may VOID YOUR WARRANTY.

WARNING

• The electric starter is equipped with a 120V A.C. Power Plug designed to operated with a grounded extension cord and on 120V A.C. household current. It must be properly grounded at all times to avoid the possibility of injury or death from electrical shock.
• Determine if your house wiring has a Ground Fault Interrupted (G.F.I.) Three-Wire Grounded System; if you are not sure, ask a Licensed Electrician.
• If your house wiring does not have a G.F.I. Three-Wire Grounded System, DO NOT USE THIS ELECTRIC STARTER UNDER ANY CONDITION.
• If your house wiring is grounded and a G.F.I. Three-Prong Wall Receptacle is not available at the location where your starter will be used, one must be installed by a Licensed Electrician BEFORE USING THE ELECTRIC STARTER!

1. To avoid carbon monoxide poisoning, be sure engine is started and run outdoors in a well-ventilated area.

2. Be sure fuel shut-off valve, if present (see equipment Operator’s Manual instructions) is open and all switches are in the “on” position..

3. Plug an extension cord into the electric starter inlet located on the engine’s surface. Plug the other end of extension cord into a three-prong 120-volt, grounded, AC outlet in a well-ventilated area.
   CAUTION
   The extension cord can be any length, but must be rated for 15 amps at 125 volts, grounded and rated for outdoor use.
   IMPORTANT:
   When connecting the power cord, always connect the power cord to the electric starter inlet on the engine first; then into the G.F.I. three-pronged wall outlet.

4. Insert on/off key and turn to the ON position.
   IMPORTANT: If the service light remains on for more than 5 seconds or begins to flash or both the ready light and service light remain off disconnect the extension cord from the engine and charge the battery (see Charging the Battery in the Maintenance Section of this manual). After charging the battery repeat STEPS 1-4. If the service light comes on again contact your Authorized MTD Service Dealer. DO NOT attempt to troubleshoot this engine in any other way.

5. Push the starter button to start the engine.
   IMPORTANT: DO NOT operate an electric starter for more than 5 seconds during each attempt.

6. Release the starter button.
   NOTE: If the engine fails to start after 3 attempts, repeat steps 6 through 7.

7. Disconnect the extension cord from the outlet.

8. Disconnect the extension cord from the electric starter inlet on the engine.
   IMPORTANT: If engine does not start after following steps 1 through 11, contact your Authorized MTD Service Dealer. DO NOT attempt to troubleshoot engine.

9. Move the engine speed control to the desired speed. See Selecting Engine Speed/Power.

Engines with Recoil Starters
If you have an electric starter, see Engines with Electric Starters earlier in this section.

WARNING
DO NOT pull recoil starter with engine running. Doing so may VOID YOUR WARRANTY.

1. To avoid carbon monoxide poisoning, be sure engine is started and run outdoors in a well-ventilated area.

2. Be sure fuel valve, if present (see equipment Operator’s Manual instructions) is open and all switches are in the “on” position.

3. Insert on/off key and turn to the ON position.
   IMPORTANT: If the service light remains on for more than 5 seconds or begins to flash or both the ready light and service light remain off disconnect the extension cord from the engine and charge the battery (see Charging the Battery in the Maintenance Section of this manual). After charging the battery repeat STEPS 1-4. If the service light comes on again contact your Authorized MTD Service Dealer. DO NOT attempt to troubleshoot this engine in any other way.

4. Operate equipment control to release engine brake or clutch, if equipped (see equipment Operator’s Manual).
   WARNING
   When pulling the starter, the handle may unexpectedly jerk back toward the engine causing serious injury. To avoid this risk, carefully follow the instructions below:

5. Grasp the recoil starter handle.

   • Pull handle out slowly until you feel resistance.

   • Pull the handle with one rapid full arm stroke.

   • Return the handle slowly to the original position, repeat if necessary.
     NOTE: Following the instructions listed in the steps above avoids potential damage to the recoil mechanism.
     NOTE: If the recoil starter handle is frozen and will not operate the engine, proceed as follows:

   • Pull as much rope out of the starter as possible.

   • Release the recoil starter handle and let it snap back against the starter to break up ice; repeat if necessary.

6. If the engine fails to start after 3 attempts repeat steps 5 through 6 and try again.

7. Move the engine speed control to the desired speed. See Selecting Engine Speed/Power.

8. If engine does not start after following steps 1 through 6 or the service light comes on, contact your Authorized MTD Service Dealer. DO NOT attempt to troubleshoot this engine in any other way.

Selecting Engine Speed/Power

NOTE: The speed control knob is used to select one of three positions to select engine speed. Engine can be started in any speed setting (Figure 7):

• Position One (a): Upper setting, provides full engine speed for maximum power during normal product operation.
• Position Two (b): Center setting, lowers engine speed during operation when less power is required (example: removing light snow, quieter operation or reducing distance snow must be blown).
• Position Three (c): Lower setting, used for idle engine speed.

Stopping the Engine & Short Term Storage

WARNING
To avoid unsupervised equipment operation, especially by children, NEVER leave the engine running while unattended. Always turn off the engine after use and remove the safety key, if equipped.

WARNING
NEVER store the engine with fuel in the fuel tank inside a building with potential sources of ignition such as hot water tank and space heaters, clothes drivers, electric motors, etc.

1. If operating the engine in the snow or rain, run the engine for a few minutes to help dry off any moisture.

2. Turn the on/off key to the OFF Position and remove the key (Figure 8).

3. Move the equipment control, if present (see Equipment Owner’s Manual), engine control lever or ignition switch to “STOP” or “OFF” position.

4. Remove ignition key, if provided (see equipment Operator’s Manual).
   NOTE: Removing the key will reduce the possibility of unauthorized starting of the engine while equipment is not in use.

After the Engine is Stopped

WARNING
To prevent the possible freeze-up of engine controls, follow instructions with engine STOPPED, listed below:

1. Wipe all snow and moisture from the engine control lever and choke areas.
2. If equipped, move the equipment control, engine control lever or ignition switch (see equipment Operator’s Manual) back and forth several times and leave the control in the “STOP” or “OFF” position.
3. Move the engine choke back and forth several times and leave in the “FULL CHOKE” position.
4. Be sure the Fuel Shut-Off Valve, if present, is in the closed “OFF” position.

SERVICE AND MAINTENANCE

WARNING
Shut off the engine before performing any maintenance. To prevent accidental start-up, remove the safety key or disconnect the spark plug wire and ground against the engine.

General Recommendations
Periodic inspection and adjustment of the engine is essential if high level performance is to be maintained. Regular maintenance will also ensure a long service life. The required service intervals and the kind of maintenance to be performed are described in the table below. Follow the hourly or calendar intervals, whichever occurs first. More frequent service is required when operating in adverse conditions.

NOTE: If engine must be tipped to transport equipment or inspect, keep spark plug side of engine up. Transporting or tipping engine spark plug down may cause smoking, hard starting, spark plug fouling, or oil saturation of air cleaner.

WARNING
If the engine has been running, the muffler will be very hot. Allow engine and muffler to cool before performing any maintenance.

Maintenance Schedule

Changing the Oil

To avoid engine damage, it is important to:
Check oil level before each use and every 5 operating hours when the engine is warm. See Checking Oil Level/Adding Oil on page 5.
Change the oil after the first 5 operating hours and every 50 operating hours thereafter. Engine should still be warm but NOT HOT from recent use.

WARNING
If the engine has been running the muffler, engine head and spark plug will be very hot. Be careful not to touch any of these components until they have cooled.

WARNING
Before tipping engine or equipment to drain oil, drain fuel from tank by running engine until fuel tank is empty.

1. Carefully disconnect the spark plug wire (a) and keep it away from the spark plug (b). Refer to Figure 9 for spark plug location.
   IMPORTANT: Keep the disconnected spark plug wire securely away from the metal parts where arcing could occur.
   NOTE: Carefully attach the spark plug wire to the grounding post, if provided.

2. Ensure the fuel cap is on and securely tightened.

3. Clean area around the oil drain plug (a) (Figure 10).

4. Place an approved recyclable oil container under the oil drain plug.

5. Remove the oil drain plug (Figure 10).

WARNING
Used engine oil may cause skin cancer if repeatedly left in contact with the skin for prolonged periods. Although this is unlikely unless you handle used oil on a daily basis, it is still advisable to thoroughly wash your hands with soap and water as soon as possible after handling used oil.

6. Tip engine to position the oil flow so it will drain from the lowest point on the engine.
7. Drain the oil into an approved recyclable oil container. NOTE: Please dispose of used engine oil in a manner that is compatible with the environment. We suggest you take it in a sealed container to your local service station or auto parts store for recycling. Do not throw it in the trash or pour it on the ground.
8. Install the oil drain plug and tighten securely.
9. Clean area around the oil drain plug.
10. Fill with the recommended oil. See Oil Recommendations and Checking Oil Level/Adding Oil on page 5.
11. Carefully disconnect spark plug wire from grounding post, if present.
12. Carefully reconnect the spark plug wire to the spark plug.
    NOTE: It is advisable to recheck the oil level after you have operated the engine for a short while and the normal engine operating temperature has been achieved.

Spark Plug Service

WARNING
DO NOT check for spark with spark plug removed. DO NOT crank engine with spark plug removed.

Check the spark plug yearly or every 100 operating hours. To ensure proper engine operation, the spark plug must be properly gapped and free of deposits.

1. Remove the spark plug boot (Figure 9).

2. Clean the area around the spark plug.

3. Use a spark plug wrench to remove the spark plug.
   WARNING
   If the engine has been running, the muffler, engine head and spark plug will be very hot. Be careful not to touch any of these components until they have cooled.

4. Visually inspect the spark plug. Discard the spark plug if there is apparent wear, or if the insulator is cracked or chipped. Replace the spark plug if the electrodes are pitted, burned or fouled with deposits.

5. Clean the spark plug with a wire brush if it is to be reused.

6. Measure the plug gap with a feeler gauge. Correct as necessary by bending side electrode (a) (Figure 11). The gap should be set to 0.030 – .06 in. (0.76 – 1.5 mm).

7. Check that the spark plug washer is in good condition

8. Thread the spark plug in by hand to prevent cross-threading.

9. After the spark plug is seated, tighten with a spark plug wrench to compress the washer.NOTE: When installing a new spark plug, tighten 1⁄2 turn after the spark plug seats to compress the washer. When reinstalling a used spark plug, tighten 1⁄8-1⁄4 turn after the spark plug seats to compress the washer.
   NOTE: The spark plug must be securely tightened. An improperly tightened spark plug can become very hot and may damage the engine.

Adjustments
DO NOT make any engine adjustments. Factory settings are satisfactory for most conditions. If adjustments are needed, contact your Authorized MTD Servicing Dealer.

Diagnostic Service Light
Used to determine engine system fault and provide diagnostic information. The service light (a) will light up briefly when turning the on/off key to the ON position (Figure 12). If the service light remains on or flashes, turn the on/off key to the OFF position and contact the nearest Authorized MTD Servicing Dealer.

Alternator (if equipped)

Contact your Authorized MTD Servicing Dealer for alternator related electrical problems such as:

• Inoperative Starter
• Discharged Battery
• Fuse Replacement
• Alternator Maintenance/Repairs

Engine Speed

WARNING
To avoid serious injury or death, DO NOT modify engine in any way. Tampering with the governor setting can lead to a runaway engine and cause it to operate at unsafe speeds. NEVER tamper with the factory setting of the engine governor.

WARNING
Running the engine faster than the speed set at the factory can be dangerous and will VOID THE ENGINE WARRANTY.

Removing Snow from the Engine

• After each use, remove snow from the following areas:
• Oil Fill Cap & Dipstick
• Fuel Cap
• Recoil Starter/Flywheel Screen
• Linkage
• Guards
• Spark Plug Connection (if visible)
• Electric Starter Switch Box, if present (see the equipment Operator’s Manual instructions).
• NOTE: See the equipment Operator’s Manual instructions for proper location of fuel cap and control lever.
• Removing snow will ease operation of the recoil starter and reduce the risk of water contamination when opening the fuel cap.
• NOTE: For more information about recoil starters, see Engine’s with Recoil Starters in the Operation Section of this manual.

Transporting Your Engine

WARNING
NEVER transport this engine inside of another vehicle or in any enclosed space if there is any fuel in the tank. Fuel vapor or spilled fuel may ignite.

WARNING
If there is fuel in the fuel tank, close the fuel shut-off valve, if equipped, and transport the engine upright in an open vehicle, such as an open trailer or open bed of a pickup truck.

If you DO NOT have an open vehicle and have to transport the engine upright in a closed vehicle, follow these steps for emptying the fuel tank before transporting:

1. Empty fuel tank by using a commercially available suction device designed for use with gasoline.
   WARNING
   DO NOT pour fuel from the engine or siphon fuel by mouth.

2. Drain fuel into an approved red gasoline container, being careful to avoid spilling.

3. Run the engine until remaining fuel is consumed.
   WARNING
   NEVER leave the engine unattended when it is running and NEVER run the engine in an enclosed area.

Storing Your Engine
Short-Term/Seasonal Storage

If the engine has been running, allow it to cool for at least half an hour before cleaning.
Before servicing the engine, remove the carburetor cover and/or blower housing. Remove the dirt and debris from the following areas:

• Cooling Fins
• Air Intake Screen or Recoil Starter/Flywheel Guard Areas
• Spark Plug Connection
• Levers
• Linkage Area
• Guards
• Carburetor
• Head

Removing debris will insure adequate cooling, correct engine speed and reduce the risk of fire.

NOTE: Do not spray engine with water to clean because water could contaminate fuel. Using a garden hose or pressure washing equipment can also force water into the air cleaner or muffler opening. Water in the air cleaner will soak the paper element, and water that passes through the element or muffler can enter the cylinder, causing damage.

WARNING
Accumulation of debris around muffler could cause a fire. Inspect and clean before and after each use.

Fuel Storage

WARNING
NEVER store engine with fuel in the fuel tank inside a building with potential sources of ignition such as hot water heater, space heater, clothes dryer, electric motor, etc. Failure to do so may result in an explosion and result in death or serious injury.

NOTE: If engine fuel stored in the fuel tank and/or an approved fuel container is to be unused without fuel stabilizer for more than 15-30 days, prepare it for short-term/seasonal storage. See Fuel Treatment later in this section.
NOTE: If engine fuel is to be stored for more than one season, without fuel stabilizer, it will gradually deteriorate. Also, if it
is stored in the engine’s fuel tank without fuel stabilizer it is likely that your carburetor will have gum deposits, a clogged fuel system and will VOID YOUR WARRANTY. Prepare the fuel for extended storage.

FUEL SYSTEM
To avoid stale fuel and carburetor problems, treat the fuel system in the following manner:

NOTE: Always follow mix ratio found on the stabilizer container. Failure to do so may result in engine damage.
NOTE: It is NOT necessary to drain stabilized fuel from carburetor.

FUEL TREATMENT

1. Add a fuel stabilizer according to the manufacturer’s instructions.
2. Run engine at least 10 minutes after adding the stabilizer to allow it to reach the carburetor.
   NOTE: Instead of using a fuel preservative/stabilizer, you can empty the fuel tank as described in Extended Storage — Draining the Fuel.

Extended Storage
DRAINING THE FUEL
NOTE: Clean debris from the engine before draining fuel from the carburetor.
NOTE: If you have prepared your fuel for short-term storage it is NOT necessary to drain fuel that contains stabilizer from your carburetor.

WARNING
Before tipping engine or equipment to drain oil, drain fuel from tank by running engine until fuel tank is empty.

1. To prevent serious injury from fuel fires, empty fuel tank by running engine until it stops from lack of fuel. DO NOT attempt to pour fuel from engine.

2. Run the engine until the remaining fuel is consumed.
   WARNING
   NEVER leave the engine unattended when it is running and NEVER run the engine in an enclosed area.

3. Begin servicing the cylinder bore as per the following instructions.

OIL CYLINDER BORE

WARNING
When lubricating cylinder bore, fuel may spray from the spark plug hole. To prevent serious injury from fuel fires, follow these instructions:

1. Turn off all the engine switches.

2. Remove the safety key, if provided.

3. Carefully disconnect the spark plug wire and ground it against the engine.
   Keep the disconnected spark plug wire securely away from the spark plug and metal parts where arcing could occur.
   Carefully attach the spark plug wire to the grounding post, if provided.

4. Remove the spark plug.

5. Squirt 1⁄2 oz. (15ml) of clean engine oil into the spark plug hole.

6. Cover the spark plug hole with a rag to prevent fuel from spraying from the spark plug hole when the recoil starter is pulled.
   NOTE: for engines equipped with a recoil starter, proceed to Step 7. For engines equipped with electric starters, proceed to Step 8.

7. For recoil starter engines:

   • Grasp the recoil starter handle.
   • Pull the recoil starter handle out slowly using a full arm stroke.
   • Repeat once. This will distribute the oil throughout the cylinder to prevent corrosion during storage.
   • Proceed to Step 9.

8. For electric starter engines:

   • Plug an extension cord into the three-prong connector located on the engine’s surface. Plug the other end of extension cord into a three-prong 120-volt, grounded, AC outlet in a well-ventilated area.
   • Push and immediately release the starter button. This will distribute the oil throughout the cylinder to prevent corrosion during storage.
   • Disconnect the extension cord from the outlet.
   • Disconnect the extension cord from the three-prong connector on the engine.
   • Proceed to Step 9.

9. Remove the rag from spark plug hole.

10. Install the spark plug.

11. Carefully disconnect the spark plug wire from the grounding post, if provided.

12. Connect the spark plug wire plug wire to the spark plug.

Oil
Change the oil if NOT changed within the last 3 months. See Checking and Changing the Oil earlier in this section.

Off-Season Storage

CAUTION
Failure to use a fuel stabilizing additive or completely run the engine until it’s out of fuel before off-season storage may result in damage to your engine’s carburetor.
Subsequent damage would not be covered under the manufacturer’s warranty.

Engines stored between 30 and 90 days need to be treated with a fuel stabilizer and engines stored over 90 days need to be drained of fuel to prevent deterioration and gum from forming in fuel system or on essential carburetor parts. If the fuel in your engine deteriorates during storage, you may need to have the carburetor, and other fuel system components, serviced or replaced.

1. Remove all fuel from tank by running engine until it stops from lack of fuel.
   WARNING
   Never leave engine unattended while it is running.

2. Change the oil. See Changing the Oil earlier in this section.

3. Oil the cylinder bore. See Oil Cylinder Bore earlier in this section.

4. Clean debris from around the engine and the muffler. Touch up any damaged paint, and coat other areas that may rust with a light film of oil.

5. Store in a clean, dry and well ventilated area away from any appliance that operates with a flame or pilot light, such as a furnace, water heater, or clothes dryer. Also avoid any area with a spark producing electric motor, or where power tools are operated.

6. If possible, also avoid storage areas with high humidity, because that promotes rust and corrosion.

7. Keep the engine level in storage. Tilting can cause fuel or oil leakage.

Removing From Storage

1. Check your engine as described in the Pre-Operation Check section of this manual.
2. If the fuel was drained during storage preparation, fill the tank with fresh gasoline. If you keep a container of gasoline for refueling, make certain it contains only fresh fuel. Gasoline oxidizes and deteriorates over time, causing hard starting.
3. If the cylinder was coated with oil during storage preparation, the engine will smoke briefly at startup. This is normal.

Battery

The battery must be stored with a full charge. Extended storage of a discharged battery will reduce life and capacity of the battery. For optimal battery life, charge the battery once per month while in storage.

CHARGING EFI BATTERY (IF EQUIPPED)

WARNING
The battery contains corrosive fluid and toxic material; handle with care and keep away from children. Do not puncture, disassemble, damage or incinerate the battery. Explosive gases could be vented during charging or discharging. Use in a well ventilated area, away from sources of ignition.

NOTE: The battery must have enough charge to power the EFI System for the engine to start. The battery will charge as the engine is running. A battery charger is provided if the battery requires charging after initial product setup, off season storage or if the battery requires charging during seasonal use.
NOTE: The special designed plug on the charger will only fit into plug on battery box.

1. Unhinge the cover seal and plug the battery charger into the port on the side of the battery housing (Figure 13).

2. Insert the battery charger plug into a standard 120V household outlet. Charge battery for 8 to 10 hours before initial use. Do not charge longer than 12 hours. The battery should only need to be charged upon initial setup, at the end of the season and after any other extended periods of non-use as needed.

3. After charging, disconnect charger plug from outlet first, then disconnect charger lead from battery and reattach cover seal.
   IMPORTANT: Do not remove the battery pack from the electric starter housing for any reason other than replacement.
   IMPORTANT: Always plug charger lead into battery pack lead first, and then insert battery charger plug into 120V standard household outlet. Follow this order of action every time you charge the battery.

REPLACING BATTERY (IF EQUIPPED)

WARNING
Batteries contain sulfuric acid which may cause burns. Do not short circuit or damage batteries in any way. Do not put batteries in fire as these may burst or release toxic materials.

1. Release the three locking tabs (a) from the slots (b) and open the battery box (Figure 14).

2. Remove positive and negative leads from battery.

3. Tilt the battery forward and remove the battery from the battery box.

4. Place the new battery into the battery box.

5. Connect the red positive lead to the red positive (+) terminal. Connect the black negative lead to the black negative (-) terminal (Figure 15).

6. Close the battery box cover.

REPLACING BATTERY FUSE (IF EQUIPPED)

WARNING
Batteries contain sulfuric acid which may cause burns. Do not short circuit or damage batteries in any way. Do not put batteries in fire as these may burst or release toxic materials.

1. Release the three locking tabs (a) from the slots (b) and open the battery box (Figure 16).

2. Tilt fuse holder (c) forward.

3. Pull existing fuse from fuse holder

4. Insert new 7.5 amp fuse.

5. Reposition fuse holder back into battery box and close the battery box cover.

Battery Disposal
DISPOSING OF DAMAGED OR WORN-OUT BATTERIES

WARNING
The following toxic and corrosive material is used in this battery: LITHIUM- ION, a toxic material.

WARNING
To prevent contamination of the environment, contact your local waste disposal agency for specific instructions before disposing of damaged or worn-out lithium-ion batteries. Take batteries to a local recycling and/or disposal center, certified for lithium-ion battery disposal.

WARNING
Do not use broken or cracked batteries, even if there is no leakage. Replace damaged or worn-out batteries with new batteries. DO NOT ATTEMPT TO REPAIR BATTERIES! Repair attempts may result in severe personal injury, due to explosion or electrical shock.

To avoid personal injury and damage to the environment:

• Do not attempt to remove or destroy any of the battery components. Do not open or mutilate the battery. If a leak develops, released electrolytes are corrosive and toxic. Do not get the solution in your eyes or on your skin, and do not swallow it.
• Do not dispose of the battery in the regular household trash.
• Do not dispose of the battery in a fire. The cell may explode.
• Do not dispose of the battery where it will become part of any waste landfill or municipal solid waste stream.
• Cover the battery terminals with heavy-duty adhesive tape.
• Dispose of the battery according to local, state and federal regulations.
• Dispose of the battery promptly.

ABOUT CALL2RECYCLE BATTERY SEALS
Call2Recycle’s industry steward program helps battery and product manufacturers fulfill recycling requirements in the U.S. and Canada, including compliance with extensive state, provincial and federal regulations, such as the Mercury- Containing and Rechargeable Battery Act (The Battery Act). Call2Recycle® Licensees/Industry Stewards, participating battery and product manufacturers and marketers, purchase the rights to imprint the Call2Recycle Battery Seals on their rechargeable batteries and products. When you see the Call2Recycle Battery Seal, you can feel confident knowing that your battery or product can be safely and responsibly recycled.

ABOUT CALL2RECYCLE
Since 1994, Call2Recycle has diverted more than 75 million pounds of rechargeable batteries from local landfills and established a network of 30,000 recycling drop-off locations. More than 200 battery and/or product manufacturers, Call2Recycle Industry Stewards, have united to ensure that batteries are responsibly recycled when they reach their end of life and fund the program that is operated by Call2Recycle, Inc., a 501(c)4 nonprofit public service organization.
To locate the nearest recycling center, please call 1-800-822-8837.

TROUBLESHOOTING

2.      Spark plug wire disconnected.

3.      Fuel tank empty.

4.      Stale fuel.

5.      Faulty spark plug.

6.      Battery not charged.

7.      Faulty fuse.

| 1.      Wait at least 10 minutes before starting.

2.      Connect wire to spark plug.

3.      Fill tank with clean, fresh fuel.

4.      Use fuel siphon to drain fuel tank. Refill with fresh fuel.

5.      Clean, adjust gap or replace.

6.      Charge battery.

7.      Replace fuse.

Engine runs erratically| 1.      Spark plug wire loose.

2.      Spark plug scorched, defective or electrode gap is set incorrectly.

3.      Stale fuel.

4.      Water or dirt in fuel system.

| 1.      Connect and tighten spark plug wire.

2.      Re-adjust electrode gap or change.

3.      If necessary use fuel siphon to drain fuel tank. Refill with fresh fuel.

4.      If necessary use fuel siphon to drain fuel tank. Refill with fresh fuel.

Engine overheats| 1. Engine oil level low.| 1. Fill engine with proper amount of engine oil.

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