CRAFTSMAN 358.791980 Trimmer Weed Whacker Instruction Manual

CRAFTSMAN 358.791980 Trimmer Weed Whacker

Product Information

Specifications

• Model No.: 358.791980
• Manufacturer: Sears, Roebuck, and Co.
• Location: Hoffman Estates, IL 60179, U.S.A.
• Warranty: 3 years from the date of purchase
• Commercial/Rental Use Warranty: 1 year from purchase date
• Fuel Type: Unleaded gasoline
• Fuel Mix Ratio : 40:1 (2.5%) with two-stroke oil

Product Usage Instructions

Safety Rules

Before using the product, it is important to follow these safety rules:

1. Read and understand the operator’s manual before use.
2. Wear hearing protection and safety glasses marked Z87.
3. Always wear heavy, long pants, long sleeves, boots, and gloves.
4. Keep a distance of at least 50 feet (15 meters) from the hazard zone for thrown objects.
5. Secure hair above shoulder length.
6. Avoid wearing jewelry, loose clothing, or clothing with loose hanging straps, ties, tassels, etc.
7. Position the assist handle below the arrow.
8. Never allow children to operate the unit.

Assembly

Follow these steps to assemble the product:

1. Refer to the assembly section in the operator’s manual for detailed instructions.
2. Gather all the necessary components and tools.
3. Follow the step-by-step instructions to attach the various parts securely.
4. Ensure all connections are tight and properly aligned.

Operation

To operate the product, follow these guidelines:

1. Fill the fuel tank with unleaded gasoline mixed at a ratio of 40:1 (2.5%) with two-stroke oil.
2. Ensure the specified trimmer head, spool, and trimmer line are used.
3. Hold the unit firmly with both hands, maintaining a balanced stance.
4. Start the engine according to the instructions in the operator’s manual.
5. Engage the trimmer head and begin trimming by moving the unit in a controlled manner.
6. Always be aware of the hazard zone for thrown objects and maintain a safe distance from bystanders.

Maintenance

Regular maintenance is important to keep the product in optimal condition.

Follow these maintenance guidelines:

1. Refer to the maintenance section in the operator’s manual for detailed instructions.
2. Clean the unit after each use to remove debris and grass clippings.
3. Inspect and replace worn or damaged parts as needed.
4. Keep the trimmer head clean and free from clogs.
5. Check the fuel system for leaks or damage.
6. Regularly lubricate moving parts according to the recommended schedule.

Service & Adjustments

If the product requires service or adjustments, follow these steps:

1. Refer to the service & adjustments section in the operator’s manual for detailed instructions.
2. Stop the unit and disconnect the spark plug before performing any cleaning or servicing.
3. Use only identical replacement parts when servicing the unit.

Storage

When storing the product, follow these recommendations:

1. Store the unit and fuel in an area where fuel vapors cannot reach sparks or open flames.
2. Avoid storing near furnaces, water heaters, or other heat sources.
3. Keep the product out of reach of children.

FAQ

Q: What fuel should I use with this product?

• A: Use unleaded gasoline mixed at a ratio of 40:1 (2.5%) with two-stroke oil.

Q: Can I use blades or other cutting devices with this unit?

• A: No, this unit is designed for line trimmer use only. Never use blades, flailing devices, wire, rope, string, etc.

Q: What safety precautions should I take while using this product?

• A: Always wear hearing protection, safety glasses marked Z87, heavy, long pants, long sleeves, boots, and gloves. Secure hair above shoulder length and avoid wearing jewelry or loose clothing that can get caught in moving parts.

Q: How far should I stay away from the hazard zone for thrown objects?

• A: Maintain a distance of at least 50 feet (15 meters) from the hazard zone.

Q: Is it safe for children to operate this unit?

• A: No, never allow children to operate this unit. Keep it out of reach of children and store it in a secure place.

WARNING:

• Read and follow all Safety Rules and Operating Instructions before the first use of this product.

WARRANTY STATEMENT

CRAFTSMAN PROFESSIONAL FULL WARRANTY

• When used and maintained according to the operator’s manual, if this product fails due to a defect in material or workmanship within three (3) years from the date of purchase, retum it to any Sears store, Sears Service Center, or other Craftsman out- let in the United States for free repair (or replacement if repair proves impossible).
• This warranty applies for only 1 year from the purchase date if this product is ever used for commercial or rental purposes.
• This warranty covers ONLY defects in material and workmanship.

Sears will NOT pay for:

• Expendable items that can wear out from normal use within the warranty period, such as cutting lines, filters, or spark plugs.
• Repairs are necessary because of an accident or failure to operate or maintain the product according to all supplied instructions.
• Preventive maintenance, or repairs necessary due to improper fuel mixture, contaminated or stale fuel.
• This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
• Sears, Roebuck and Co., Hoffman Estates, IL 60179

IDENTIFICATION OF SAFETY SYMBOLS

• DANGER: Use only specified trimmer heve, use blades, Laing devices, and winer line. rope, string, etc.
• This unit is designed for line trimmer use only.
• Failure to follow these instructions may result in serious injury.
• WARNING: This unit can be dangerous! Careless or improper use can cause serious injury.
• Read the operator’s manual before use. Failure to follow instructions could result in serious injury. Save the operator’s manual.
• Trimmer lines can throw objects violently. You can be blinded or injured.
• Always wear hearing protection and safety glasses marked 287. Always wear heavy, long pants, long sleeves, boots and gloves.
• Hazard zone for thrown objects.
• The trimmer line throws objects violently.
• Keep children, bystanders, and animals 50 feet (15 meters) away.
• Secure hair above shoulder length.
• Do not wear jewelry, loose clothing, or clothing with loose hanging straps, ties, tassels, etc.
• They can be caught in moving parts.
• Assist handle to be positioned only below the arrow.
• Never allow children to operate this unit.
• Store the unit indoors in a high, dry place out of the reach of children.
• Store unit and fuel in areas where fuel vapors cannot reach sparks or open flames from water heaters, electric motors or switches, furnaces, etc.
• When servicing the unit, use only identical replace- ment parts.
• Always stop the unit and disconnect the spark plug before cleaning or servicing.
• WARNING: Fire hazard. Never mix, pour, or store gasoline or me, or we hate face ge sparks including smoking, open flames, or work that can cause sparks).
• Use unleaded gasoline and two-stroke oil mixed at a ratio of 40:1 (2.5%).

SAFETY RULES

• WARNING: When using gardening appliances, basic safety precautions must always be followed to reduce the risk of fire and serious injury. Read and follow all instructions.
• This power unit can be dangerous! The operator is responsible for following instructions and warnings on the unit and in the manual.
• Read the entire operator’s manual before using the unit! Be thoroughly familiar with the controls and the proper use of the unit.
• Restrict the use of this unit to persons who have read, understand, and will follow the instructions and warnings on the unit and in the manual.
• Never allow children to operate this unit.
• DANGER: Never use blades or flailing devices. This unit is designed for line trimmer use only. The use of any other accessories or attachments will increase the risk of injury.
• If situations occur which are not covered in this manual, use care and good judgment. If you need assistance, contact your Sears Service Center or call 1-800-235-5878.

OPERATOR SAFETY

• Dress properly. Always wear safety glasses or similar eye protection when operating, or performing maintenance, on your unit (safety glasses are available).
• Eye protection should be marked 287.
• Always wear a face or dust mask if the operation is dusty.
• Aways wear heavy, long pants, long sleeves, boots, and gloves. Wearing safety leg guards is recommended.
• Always wear foot protection. Do not go barefoot or wear sandals. Stay clear of the spinning line.
• Secure hair above shoulder length.
• Secure or remove loose clothing or clothing with loosely hanging ties, straps, tassels, etc. They can be caught in moving parts.
• Being fully covered also helps protect you from debris and pieces of toxic plants thrown by the spinning line.
• Stay Alert. Do not operate this unit when you are tired, ill, upset, or under the influence of alcohol, drugs, or medication. Watch what you are doing; use common sense.
• Wear hearing protection.
• Never start or run inside a closed room or building. Breathing exhaust fumes can kill.
• Keep handles free of oil and fuel.

UNIT / MAINTENANCE SAFETY

• WARNING: Disconnect the spark plug before performing maintenance except for carburetor adjustments.
• Look for and replace damaged or loose parts before each use. Look for and repair fuel leaks before use.
• Keep in good working condition.
• Replace trimmer head parts that are chipped, cracked, broken, or damaged in any other way before using the unit.
• Maintain unit according to recommended procedures. Keep cutting the line at the proper length.
• Use only the Craftsman® replacement line. Never use wire, rope, string, etc. install the required shield properly before using the unit. Use only the specified trimmer head; make sure it is properly installed and securely fastened.
• Make sure the unit is assembled correctly as shown in this manual.
• Make carburetor adjustments with lower-end support to prevent the line from contacting any object.
• Keep others away when making carburetor adjustments.
• Use only recommended Craftsman accessories and replacement parts.
• Have all maintenance and service not explained in this manual performed by a Sears Service Center.

FUEL SAFETY

• Mix and pour fuel outdoors.
• Keep away from sparks or flames.
• Do not smoke or allow smoking near fuel or the unit or while using the unit.
• Avoid spilling fuel or oil. Wipe up all fuel spills before starting the engine.
• Move at least 10 feet (3 meters) away from the fueling site before starting the engine. Stop the engine and allow it to cool before removing the fuel cap.
• Empty the fuel tank before storing or loading the unit. Use up fuel left in the carburetor by starting the engine and letting it run until it stops.
• Store unit and fuel in areas where fuel vapors cannot reach sparks or open flames from water heaters, electric motors or switches, furnaces, etc.
• Always store gasoline in a container approved for flammable liquids.

CUTTING SAFETY

• WARNING: Inspect the area before each use. Remove objects (rocks, broken glass, nails, wire, etc.) that can be thrown by or become entangled in the line.
• Hard objects can damage the trimmer head and be thrown causing serious injury.
• Use only for trimming, scalping, mowing, edging, and sweeping. Do not use it for pruning or hedge trimming.
• Keep firm footing and balance. Do not overreach.
• Keep all parts of your body away from the muffler and spinning line.
• Keep engine below waist level. A hot modification can cause serious burns.
• Cut only from your right to your left.
• Cutting on the left side of the shield will throw the debris away from the operator.
• Use only in daylight or good artificial light.
• Use only for jobs explained in this manual.

TRANSPORTING AND STORAGE

• Stop the unit before carrying it.
• Allow the engine to cool before storing or transporting it in a vehicle.
• Empty the fuel tank before storing or transporting the unit. Use up fuel left in the carburetor by starting the engine and letting it run until it stops.
• Store unit and fuel in the area where fuel vapors cannot reach sparks or open flames from water heaters, electric
• Store the unit so the limiter blade can- not accidentally cause injury. The unit can be hung by the shaft.
• Store unit out of reach of children.
• This unit is not equipped with an antivibration system and is intended for occasional use only.
• SAFETY NOTICE: Exposure to vibrations through prolonged use of gasoline-powered hand tools could cause blood vessel or nerve damage in the fingers, hands, and joints of people prone to circulation disorders or abnormal swellings.
• Prolonged use in cold weather has been linked to blood vessel damage in otherwise healthy people.
• If symptoms occur such as numbness, pain, loss of strength, change in skin color or texture, or loss of feeling in the fingers, hands, or joints, discontinue the use of this tool and seek medical attention.
• An antivibration system does not guarantee the avoidance of these problems.
• Users who operate power tools on a continual and regular basis must monitor closely their physical condition and the condition of this tool.
• SPECIAL NOTICE: This unit is equipped with a temperature-limiting muffler and spark-arresting screen which meets the requirements of California Codes 4442 and 4443. All U.S.
• forest land and the states of California, Idaho, Maine, Minnesota, New Jersey, Oregon, and Washington require by law that many internal combustion engines be equipped with a spark-arresting screen.
• If you operate in a locale where such regulations exist, you are legally responsible for maintaining the operating condition of these parts.
• Failure to do so is a violation of the law. For normal homeowner use, the muffler and spark-arresting screen will not require any service. After 50 hours of use, we recommend that your muffler be serviced or replaced by a Sears Service Center.

ASSEMBLY

CARTON CONTENTS

• Check carton contents against the following list.
• Model 358.791980
• Trimmer
• Shield
• Wing Nut (screwed onto shield)
• Container of line
• Container of oil
• Examine parts for damage. Do not use damaged parts.
• NOTE: If you need assistance or find parts missing or damaged, call 1-800-235-5878.
• It is normal for the fuel filter to rattle in the empty fuel tank.
• Finding fuel or oil residue on the muffler is normal due to carburetor adjustments and testing done by the manufacturer.

ASSEMBLY

• WARNING: If received assembled, repeat all steps to ensure your unit is properly assembled and all fasteners are secure.

ADJUSTING THE HANDLE

WARNING: When adjusting the assist handle, be sure it remains above the safety label and below the mark or arrow on the shaft.

1. Loosen the wing nut on the handle.
2. Rotate the handle on the shaft to an upright position; retighten the wing nut.

ATTACHING SHIELD

• WARNING: The shield must be properly installed. The shield provides partial protection from the risk of throwing objects at the operator and others and is equipped with a line limiter blade that cuts excess line to the proper length.
• The line limiter blade (on the underside of the shield) is sharp and can cut you.
• For proper orientation of the shield, see the KNOW YOUR TRIMMER illustration in the OPERATION section.

1. Remove the wing nut from the shield.
2. Insert the bracket into a slot as shown.
3. Pivot the shield until the bolt passes through the hole in the bracket.
4. Securely tighten the wing nut onto the bolt.

OPERATION

KNOW YOUR TRIMMER

READ THIS OPERATOR’S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR UNIT. Compare the illustrations with your unit to familiarize yourself with the location of the various controls and adjustments. Save this manual for future reference.

ON/STOP SWITCH

• The ON/STOP switch is used to stop the engine. To stop the engine, push and release the engine ON/STOP switch.

PRIMER BULB

• The PRIMER BULB removes air from the carburetor and fuel lines and fills them with fuel.
• This allows you to start the engine with fewer pulls on the starter rope. Activate the primer bulb by pressing it and allowing it to return to its original form.

THROTTLE LOCK-OUT

• The THROTTLE LOCK-OUT must be pressed with the palm of your hand as you grip the throttle handle before the trigger can be used.
• This feature prevents you from accidentally squeezing the throttle trigger.

СНОКЕ

• The CHOKE helps to supply fuel to the engine to aid in cold starting. Activate the choke by moving the choke lever to the FULL CHOKE position.
• After the engine attempts to start, move the choke lever to the HALF CHOKE position.
• Once the engine has started, move the choke lever to the OFF CHOKE position.

BEFORE STARTING ENGINE

• WARNING: Be sure to read the fuel information in the safety rules before you begin.
• If you do not understand the safety rules, do not attempt to fuel your unit. Call 1-800-235-5878.

FUELING ENGINE

• WARNING: Remove the fuel cap slowly when refueling.
• This engine is cedJfledto operate on unleaded gasoline. Before the operation, gasoline must be mb< ed with good quality synthetic 2-cycle air-cooled engine oil.
• We recommend Craftsman brand synthetic oil.
• Mix gasoline and oil at a ratio of 40:1. A 40:1 ratio with this trimmer is a 3.2-ounce container of oil.
• Pour the entire contents of this container into 1 gallon of gasoline to achieve the proper fuel mixture.
• DO NOT USE automotive oil or marine oil.
• These oils will cause engine damage.
• When mixing fuel, follow instructions printed on the container.
• Once the oil is added to gasoline, shake the container momentarily to ensure that the fuel is thoroughly mixed.
• Always read and follow the safety rules relating to fuel before fueling your unit.

IMPORTANT

• Alcohol blended fuels (called gasohol or using ethanol or methanol) can attract moisture which leads to separation and formation of acids during storage.
• Acidic gas can damage the fuel system of an engine while in storage.
• To avoid engine problems, empty the fuel system before storage for 30 days or longer.
• Drain the gas tank, start the engine, and let it run until the fuel lines and carburetor are empty.
• Use fresh fuel next season.
• Never use engine or carburetor cleaner products in the fuel tank or permanent damage may occur.
• See the STORAGE section for additional information.

HOW TO STOP YOUR UNIT

• Release the throttle trigger.
• Push and release the engine ON/ STOP switch. The switch will automatically return to the ON position.
• Wait 5 seconds before attempting to restart the unit to allow the switch to reset.

HOW TO START YOUR UNIT

• WARNING: Avoid any contact with the muffler. A hot muffler can cause serious burns.

STARTING A COLD ENGINE

NOTE: DO NOT squeeze the throttle trigger until the engine has started and runs.

1. Set the unit on a fiat surface.
2. Slowly press the primer bulb 10 times.
3. Move the choke lever to the FULL CHOKE position.
4. This unit has the Sim-pul™ starting system. You do not have to pull the starter rope handle sharply or briskly.
   • Pull the starter rope handle with a controlled and steady motion until the engine sounds as if it is trying to start, but do not pull the rope more than 3 times.
5. As soon as the engine sounds as if it is trying to start, move the choke lever to the HALF CHOKE position. Pull the starter rope until the engine runs.
   • NOTE: If the engine doesn’t start alter 6 pulls (at the HALF CHOKE position), move the choke lever to the FULL CHOKE position. Pull the starter rope 2 more times.
   • Move the choke lever to the HALF CHOKE position and pull the starter rope bl the engine runs, but no more than pulls.
6. If the engine still doesn’t start, it is probably flooded. Proceed to STARTING A FLOODED ENGINE.
7. Once the engine starts, allow it to run for 10 seconds, then move the choke lever to the OFF CHOKE position.
   • NOTE: If the engine dies with the choke lever in the OFF CHOKE position, move the choke lever to the FULL CHOKE position and pull the rope until the engine runs, but no more than 6 pulls.

STARTING A WARM ENGINE

1. Move the choke lever to the HALF CHOKE position.
2. Pull the starter rope with a controlled and steady motion until the engine runs, but no more than 6 pulls.
3. Allow the engine to run for 15 seconds, then move the choke lever to OFF CHOKE.

• NOTE: If the engine has not started, pull the starter rope for 5 more pulls. If the engine still does not run, it is probably flooded.
• STARTING A FLOODED ENGINE Flooded engines can be started by placing the choke lever in the OFF CHOKE position; then, pull the rope to clear the engine of excess fuel.
• This could require pulling the starter handle many times depending on how badly the unit is flooded.
• If the unit still doesn’t start, refer to TROUBLESHOOTING TABLE or call 1-800-235-5878.

OPERATING INSTRUCTIONS

• To maximize operating efficiency, do not run the engine for longer than 1 minute at a time in full traffic.

OPERATING POSITION

ALWAYS USE:

WARNING: Always wear eye protection and hearing protection. Never lean over the trimmer head. Rocks or debris can ricochet or be thrown into the eyes and face and cause blindness or other serious injury.

• When operating the unit, stand as shown and check for the following
• Wear eye protection, hearing protection, and heavy clothing.
• Hold the trigger handle with your right hand and assist the handle with your left hand.
• Hold the unit so that the engine is below waist level.
• Cut only from your left to your right to ensure debris is thrown away from you. Without bending over, keep the line near and parallel to the ground, and do not crowd into the material being cut.
• Do not run the engine at a higher speed than necessary. The cutting line will cut efficiently when the engine is run at less than full throttle. At lower speeds, there is less engine noise and vibration.
• Always release the throttle trigger and allow the engine to return to idle speed when not cutting.

HOW TO STOP YOUR UNIT

• Release the throttle trigger.
• Push and release the engine ON/ STOP switch.

CUTTING METHODS

• WARNING: Use minimum speed and do not crowd the line when cutting around hard objects (rock, gravel, fence posts, etc.), which can damage the trimmer head, become entangled in the line, or be thrown causing a serious hazard.
• The tip of the line does the cutting.
• You will achieve the best performance and minimum line wear by not crowding the line into the cutting area. The right and wrong ways are shown below.
• The line will easily remove grass and weeds from around walls, fences, trees, and flower beds, but it also can cut the tender bark of trees or shrubs and scar fences.
• For trimming or scalping, use less than full throttle to increase line life and decrease headwear, especially:
• During light-duty cutting.
• Near objects around which the line can wrap such as small posts, trees, or fence wire.
• TRIMMING – Hold the bottom of the trimmer head about 3 inches (8 cm) above the ground and at an angle. Allow only the tip of the line to make contact with vegetation.
• Do not force the trimmer line into the work area.
• SCALPING – The scalping technique removes unwanted vegetation down to the ground. Hold the bottom of the trimmer head about 3 inches (8 cm) above the ground and at an angle.
• Allow the tip of the line to strike the ground around trees, posts, monuments, etc.
• This technique increases line wear.
• MOWING – Your trimmer is ideal for mowing in places conventional lawnmowers cannot reach.
• In the mowing position, keep the line parallel to the ground.
• Avoid pressing the head into the ground as this can scalp the ground and damage the tool.
• SWEEPING – The fanning action of the rotating line can be used to blow away loose debris from an area. Keep the line parallel to and above the area surface and swing the tool from side to side.

MAINTENANCE

MAINTENANCE SCHEDULE

WARNING: Disconnect the spark plug before performing maintenance except for carburetor adjustment.

GENERAL RECOMMENDATIONS

• The warranty on this unit does not cover items that have been subjected to operator abuse or negligence.
• To receive full value from the warranty, the operator must maintain the unit as instructed in this manual.
• Various adjustments will need to be made periodically to properly maintain your unit.

CHECK FOR LOOSE FASTENERS AND PARTS

• Spark Plug Boot
• Air Filter
• Housing Screws
• Assist Handle Screw
• Debris Shield

CHECK FOR DAMAGED OR WORN PARTS

• Contact Sears Service Center for replacement of damaged or worn parts.
• ON/STOP Switch – Ensure the ON/STOP switch functions properly by pushing and releasing the switch. Make sure the engine stops.
• Wait 5 seconds before  attempting to restart the unit to allow the switch to reset.
• Restart the engine and continue.
• Fuel Tank – Discontinue the use of the unit if the fuel tank shows signs of damage or leaks.
• Debris Shield – Discontinue the use of the unit if the debris shield is damaged.

INSPECT AND CLEAN UNITS AND DECALS

• After each use, inspect the complete unit for loose or damaged parts.
• Clean the unit and decals using a damp cloth with a mild detergent.
• Wipe off the unit with a clean dry cloth.

CLEAN AIR FILTER

A dirty air filter decreases engine performance and increases fuel consumption and harmful emissions. Always clean after every 5 hours of operation.

1. Clean the cover and the area around it to keep dirt from falling into the carburetor chamber when
2. the cover is removed. Remove parts as illustrated.
   • NOTE: To avoid creating a fire hazard or producing harmful evaporative emissions, do not clean the filter in gasoline or other flammable solvent.
3. Wash the filter with soap and water.
4. Allow the filter to dry.
5. Replace parts.

INSPECT MUFFLER AND SPARK ARRESTING SCREEN

• WARNING: The muffler on this product contains chemicals known to the State of California to cause cancer.
• As your unit is used, carbon deposits build up on the muffler and spark arresting screen.
• For normal homeowner use, however, the muffler and spark-arresting screen will not require any service. After 50 hours of use, we recommend that your muffler be serviced or replaced by your Sears Service Center.

REPLACE SPARK PLUG

Replace the spark plug each year to ensure the engine starts easier and runs better. Set the spark plug gap at 0.025 inch. Ignition timing is fixed and nonadjustable.

1. Twist, then pull off the spark plug boot.
2. Remove the spark plug from the cylinder and discard.
3. Replace with Champion RCJ-6Y spark plug and tighten securely with a 3/4 inch socket wrench.
4. Reinstall the spark plug boot.

SERVICE AND ADJUSTMENTS

LINE REPLACEMENT

• Always use the Craftsman replacement line.
• Choose the line size best suited for the job at hand. Redline (#71-85908) is designed for cutting grass and small weeds. The black colored line (#71-85909) is designed for cutting larger weeds and light brush.
• NOTE: Before inserting a new line into the holes in the cutting head, identify the proper holes. Follow directions as shown on the line glide plate.

1. Remove the old line and line glide plate from the cutting head.
2. Clean the entire surface of the cutting head.
3. Reinstall the line glide plate (see il- lustration). Align arrow with:
   • (A) when using medium (red) or large (black) lines when using lines with a diameter
   • (B) smaller than the medium (red) line (optional)
   • NOTE: Line glide plate must be reinstalled in the cutting head before inserting a new line.
4. Insert both ends of your line through the proper holes in the side of the cutting head.
5. Pull the line and make sure the line is against the hub and extended fully through the positioning tunnels.
6. The correctly installed line will be the same length on both ends.

REPLACING THE TRIMMER HEAD

1. Align the hole in the dust cup with the hole in the side of the gearbox by rotating the arbor shaft.
2. Insert a small screwdriver into aligned holes. This will keep the shaft from turning while removing and installing the trimmer head.
3. While holding the screwdriver in position, remove the trimmer head by turning it clockwise.
4. Thread the replacement trimmer head onto the shaft by turning counterclockwise. Only tighten your hand tight!
5. Remove the screwdriver.

CARBURETOR ADJUSTMENT

WARNING: Keep others away when making idle speed adjustments.

• The trimmer head will be spinning during most of this procedure. Wear your protective equipment and observe all safety precautions.
• After making ad adjustments, the trimmer head must not move or spin at idle speed.
• The carburetor has been carefully set at the factory. Adjustments may be necessary if you notice any of the following conditions:
• The engine will not idle when the throttle is released.
• The trimmer head moves or spins at idle.
• Make adjustments with the unit supported so the cutting attachment is off the ground and will not make contact with any object.
• Hold the unit by hand while running and making adjustments.
• Keep all parts of your body away from the cutting attachment and muffler. Idle Speed Adjustment
• Allow engine to idle. Adjust speed until the engine runs without the trimmer head moving or spinning (idle too fast) or engine stalling (idle speed too slow).
• Turn the idle speed screw clockwise to increase engine speed if the engine stalls or dies.
• Turn the idle speed screw counterclock- wise to decrease engine speed if the trimmer head moves or spins at idle.
• WARNING: Recheck the idle speed after each adjustment. The trimmer head must not move or spin at idle speed to avoid serious injury to the operator or others.
• If you require further assistance or are unsure about performing this procedure, contact your Sears Service Center or call our customer assistance help line at 1-800-235-5878.

STORAGE

WARNING: Perform the following steps after each use:

• Allow engine to cool before storing or transporting.
• Store unit and fuel in a well-ventilated area where fuel vapors cannot reach sparks or open flames from water heaters, electric motors or switches, furnaces, etc.
• Store unit with all guards in place.
• Position the unit so that any sharp object cannot accidentally cause injury.
• Store unit and fuel well out of the reach of children.

SEASONAL STORAGE

• Prepare the unit for storage at the end of the season or if it will not be used for 30 days or more.
• If your unit is to be stored for some time:
• Clean the entire unit before lengthy storage.
• Store in a clean dry area.
• Lightly oil external metal surfaces.

FUEL SYSTEM

• Empty the fuel system before storage for 30 days or longer. Drain the gas tank, start the engine, and let it run until the fuel lines and carburetor are empty. Use fresh fuel next season.
• Under FUELING ENGINE in the OPERATION section of this manual, see the message labeled IMPORTANT regarding the use of gasohol in your engine.
• A fuel stabilizer is an acceptable alternative for minimizing the formation of fuel gum deposits during storage.
• Add stabilizer to the gasoline in the fuel tank or fuel storage container.
• Follow the mix instructions found on the stabilizer container.
• Run the engine for at least 3 minutes after adding the stabilizer.
• Craftsman 40:1, 2-cycle engine oil (air cooled) is already blended with fuel stabilizer.
• If you do not use this Sears oil, you can add a fuel stabilizer to your fuel tank.

ENGINE

• Remove the spark plug and pour 1 teaspoon of 40:1, 2-cycle engine oil (air-cooled) through the spark plug opening. Slowly pull the starter rope 8 to 10 times to distribute oil.
• Replace the spark plug with a new one of the recommended type and heat range.
• Clean air filter.
• Check the entire unit for loose screws, nuts, and bolts. Replace any damaged, broken, or worn parts. gasoline to oil ratio.

OTHER

• Do not store gasoline from one season to another.
• Replace your gasoline can if it starts to rust.

TROUBLESHOOTING TABLE

WARNING: Always stop the unit and disconnect the spark plug before performing all of the recommended remedies below except remedies that require the unit to be operating.

2. Fuel tank empty.

3. Spark plug not firing.

4. Fuel not reaching carburetor.

5. Carburetor requires adjustment.

| 1. See “Starting a Flooded Engine” in the Operation Section.

2.  Fill the tank with the correct fuel mixture.

3.  Install a new spark plug.

4.  Check for dirty fuel filters; replace them. Check for kinked or split fuel lines; repair or replace.

5.  Contact Sears Service (see back cover).

The engine will not idle properly.| 1. Carburetor requires adjustment.

2. Crankshaft seals worn.

3. Compression low.

| 1.  See “Carburetor Adjustment’ in the Service and Adjustments Section.

2.  Contact Sears Service (see back cover).

3. Contact Sears Service (see back cover).

The engine will not accelerate, lack power, or die under a load.| 1. The air filter is dirty.

2. The spark plug fouled.

3. Carburetor requires adjustment.

4. Carbon build-up on muffler outlet screen.

5. Compression low.

| 1. Clean or replace the air filter.

2.  Clean or replace the plug and recap.

3.  Contact Sears Service (see back cover).

4.  Contact Sears Service (see back cover).

5.  Contact Sears Service (see back cover).

Engine smokes excessively.| 1. Fuel mixture incorrect.

2. The air filter is dirty.

3. Carburetor requires adjustment.

| 1.  Empty the fuel tank and refill it with the correct fuel mixture.

2. Clean or replace the air filter.

3. Contact Sears Service (see back cover).

The engine runs hot.| 1. Fuel mixture incorrect.

2. Spark plug incorrect.

3. Carburetor requires adjustment.

4. Carbon build-up on

muffler outlet screen.

| 1.  See “Fueling Engine” in the Operation section.

2.  Replace with the correct spark plug.

3.  Contact Sears Service (see back cover).

4. Contact Sears Service (see back cover).

U.S. EPA / CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT

• YOUR WARRANTY RIGHTS AND OBLIGATIONS: The U.S. Environmental Protection Agency/California Air Resources Board and Sears, Roebuck and Co., U.S.A., are pleased to explain the emissions control system warranty on your year 2007 and later small offroad engine. In California, all small offroad engines must be designed, built, and equipped to meet the State’s stringent anti-smog standards. Sears must warrant the emission control system on your small off-road engine for the periods listed below provided there has been no abuse, neglect, or improper maintenance of your small off-road engine. Your emission control system includes parts such as the carburetor, the ignition system, and the fuel tank (California only).
• Where a warrantable condition exists, Sears will repair your small off-road engine at no cost to you.
• Expenses covered under warranty include diagnosis, parts, and labor.
• MANUFACTURER’S WARRANTY COVERAGE: If any emissions related Passions Contin as listed Pund List) is defective or a defect in the materials or workmanship of the engine causes the failure of such an emission-related part, the part will be repaired or replaced by Sears.
• OWNER’S WARRANTY-RESPONSIBILITIES: As the small off-road engine owner, you are responsible for the performance of the required maintenance listed in your operator’s manual. Sears recommends that you retain all receipts covering maintenance on your small off-road engine, but Sears cannot deny a warranty solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance. As the small off-road engine owner, you should be aware that Sears may deny you warranty coverage if your small off-road engine or a part of it has failed due to abuse, neglect, improper maintenance, unapproved modifications, or the use of parts not made or approved by the original equipment manufacturer. You are responsible for presenting your small off-road engine to a Sears-authorized repair center as soon as a problem exists. Warranty repairs should be completed in a reasonable amount of time, not to exceed 30 days. If you have any questions regarding your warranty rights and responsibilities, you should contact your nearest authorized service center or call Sears at 1-800-469-4663.
• WARRANTY COMMENCEMENT DATE: The warranty period begins on the date the small off-road engine is purchased.
• LENGTH OF COVERAGE: This warranty shall be for two years from the initial date of purchase.
• WHAT IS COVERED: REPAIR OR REPLACEMENT OF PARTS. Repair or replacement of any warranted part will be performed at no charge to the owner at an approved Sears Service Center. If you have any questions regarding your warranty rights and responsibilities, you should contact your nearest authorized service center or call Sears at 1-800-469-4663.
• WARRANTY PERIOD: Any warranted part which is not scheduled for replacement as required maintenance, or which is scheduled only for regular inspection to the effect of “repair or replace as necessary” shall be warranted for 2 years.
• Any warranted part that is scheduled for replacement as required maintenance shall be warranted for the time up to the first scheduled replacement point for that part.
• DIAGNOSIS: The owner shall not be charged for diagnostic labor which leads to the determination that a warranted part is defective if the diagnostic work is performed at an approved Sears Service Center.
• CONSEQUENTIAL DAMAGES: Sears may be liable for damages to other engine components caused by the failure of a warranted part still under warranty.
• WHAT IS NOT COVERED: All failures caused by abuse, neglect, or improper maintenance are not covered.
• ADD-ON OR MODIRED PARTS : The use of edd-on or modified parts can be grounds for disallowing a warranty claim. Sears is not liable to cover failures of warranted parts caused by the use of edd-on or modified parts.
• HOW TO RLE A CLAIM: If you have any questions regarding your warranty rights and responsibilities, you should contact your nearest authorized service center or call Sears at 1-800-469-4663.
• WHERE TO GEOR WARRANTY SERVICE : Warranty services or repairs shall be provided at all Sears Service Centers. Call 1-800-469-4663.
• MAINTENANCE, REPLACEMENT, AND REPAIR OF EMISSION-RELATED PARTS: Any Sears-approved replacement part used in the performance of any warranty maintenance or repair on emission-related parts will be provided without charge to the owner if the part is under warranty.
• EMISSION CONTROL WARRANTY PARTS LIST: Carburetor, Ignition System: Spark Plug (covered up to maintenance schedule), Ignition Module, Muffler including catalyst, Fuel Tank (California only).
• MAINTENANCE STATEMENT: The owner is responsible for the performance of all required maintenance as defined in the operator’s manual.
• The information on the product label indicates which standard your engine is certified.
• Example: (Year) EPA Phase 1 or Phase 2 and/or CALIFORNIA.

This engine is certified to be emissions-compliant for the following use:

• Moderate (50 hours)
• Intermediate (125 hours)
• Extended (300 hours)

REPAIR PARTS

SEARS GAS TRIMMER MODEL. 358 791980

Documents / Resources

| CRAFTSMAN 358.791980 Trimmer Weed Whacker [pdf] Instruction Manual
358.791980 Trimmer Weed Whacker, 358.791980, Trimmer Weed Whacker, Weed Whacker, Whacker
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References

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