NAKAYAMA PRO PH2500 Cutters and Hedge trimmers User Manual

NAKAYAMA PRO PH2500 Cutters and Hedge trimmers

WARNING
Before using our products, please read this manual carefully to understand the proper use of your unit.

SAFETY FIRST

Instructions contained in warnings within this manual marked with a symbol concern critical points which must be taken into consideration to prevent possible serious bodily injury, and for this reason you are requested to read all such instructions carefully and follow them without fail.
WARNING
This mark indicates instructions which must be followed in order to prevent accidents which could lead to serious bodily injury or death.
IMPORTANT
This mark indicates instructions which must be followed, or it leads to mechanical failure, breakdown, or damage.
NOTE
This mark indicates hints or directions useful in the use of the product.

Parts location

1. Fuel tank
2. Starter
3. Throttle lever
4. Ignition switch
5. Throttle Cable
6. Muffler
7. Blade
8. Front handle
9.  Rear handle

TECHNICAL DATA

• ENGINE TYPE:SINGLE CYLINDER,AIR COOL,2-STROKE DISPLACEMENT:23CC
• MAX POWER OUTPUT:1HP/7500RPM
• IDLE SPEED:2800±280RPM
• CLUTCH SPEED:4200±350R/MIN
• FUEL TANK CAPACITY:0.35L
• BLADE TYPE:DUAL
• NET WEIGHT:4.6KG
• CUTTING LENGTH:600MM

Warning labels on the machine

1. Read owner’s manual before operating this machine.
2. Wear head, eye and ear protection.
3. Handling this machine improperly could result in accidents causing serious injury or death. Read this manual carefully and practice using the hedge-trimmer until you are fully acquainted with all operations and have learned to use it correctly.
4. This is extremely sharp and can easily cause cuts.

Important
If warning label peel off or become soiled and impossible to read, you should contact the dealer from which you purchased the product to order new labels and affix them in the required location(s).
Warning
Never modify your hedge trimmer.
We won’t warrant the machine, if you use the remodeled hedge trimmer or you don’t observe the proper usage written in the manual.

Symbols on the machine

For safe operation and maintenance, symbols are carved in relief on the machine. According to these indications, please be careful not to take a mistake.

• (a) The port to refuel the “MIX GASOLINE” Position:
  FUEL TANK CAP

• (b) The direction to close the choke Position:
  AIR CLEANER COVER

• (c) The direction to open the choke Position:
  AIR CLEANER COVER

For safe operation

1. THIS MACHINE CAN CAUSE SERIOUS INJURIES. Read this manual carefully until you completely understand and follow all safety and operating instructions. Also, know how to stop the machine quickly in an emergency.
2. Keep this manual handy so that you may refer to it later whenever any questions arise. Also note, if you have any questions which cannot be answered herein, contact the dealer from whom you purchased the product.
3. Always be sure to include this manual when selling, lending, or otherwise transferring the ownership of this product.
4. Never allow children or anyone unable to fully understand the directions given in the manual to use the machine.

WORKING CONDITION

1. When using the product, you should wear proper clothing and protective equipment.
   •  Helmet
   • Ear protectors
   • Protection goggles or face protector
   • Thick work gloves
   • Non-slip-sole work boots
2.  And you should carry with you.
   • Attached tools
   • Properly reserved fuel
   • Spare blade
   • Things to notify your working area (rope, warning signs)
   • whistle (for collaboration or emergency)
   •  Hatchet or saw (for removal of obstacles)
   • First-aid kit
3. Do not wear loose clothing, jewelry, short trousers, sandals, or go barefoot. Do not wear anything which might be caught by a moving part of the unit. Secure hair so it is above shoulder length.

WORKING CIRCUMSTANCE

1. Never start the engine inside a closed room or building. Exhaust gases contain dangerous carbon monoxide.
2. Never use the product,
   • when the ground is slippery or when you can’t maintain a steady posture.
   • At night, at times of heavy fog, or at any other times when your field of vision might be limited and it would be difficult to gain a clear view of the working area.
   • During rain storms, during lightning storms, at times of strong or gale-force winds, or at any other times when weather conditions might make it unsafe to use the product.

WORKING PLAN

1. You should never use the product when under the influence of alcohol, when suffering from exhaustion or lack of sleep, when suffering from drowsiness as a result of having taken cold medicine or at any other time when a possibility exists that your judgment might be impaired or that you might not be able to operate the product properly and in a safe manner.
2. When planning your work schedule, allow plenty of time to rest. Limit the amount of time over which the product is to be used continuously to somewhere around 30 ~ 40 minutes per session, and take 10 ~ 20 minutes of rest between work sessions. Also try to keep the total amount of work performed in a single day under 2 hours or less.

WARNING

1. If you don’t observe the working time, or working manner (See “USING THE PRODUCT”), Repetitive Stress Injury
   (RSI) could occur.
   If you feel discomfort, redness and swelling of your fingers or any other part of your body, see a doctor before getting worse.

2. To avoid noise complaints, in general, operate product between 8 a.m. and 5 p.m. on weekdays and 9 a.m. to 5 p.m. on weekends.

NOTE
Check and follow the local regulations as to sound level and hours of operations for the product.
BEFORE STARTING THE ENGINE

1. The area within a perimeter of 15 m (50 ft) of the person using the product should be considered a hazardous area into which no one should enter. If necessary, yellow warning rope, warning signs should be placed around the perimeter of the area.
   When work is to be performed simultaneously by two or more persons, Care should also be taken to constantly look around or otherwise check for the presence and locations of other people working so as to maintain a distance between each person sufficient to ensure safety.

2. Check the condition of working area to avoid an y accident by hitting hidden obstacles such as stumps, stones, cans, or broken glass.
   IMPORTANT
   Remove any obstacle before beginning work.

3. Inspect the entire unit for loose fasteners and fuel leakage. Make sure that the cutting attachment is properly installed and securely fastened .

STARTING THE ENGINE

1. Keep bystanders especially children, and animals at least 15 m (50 ft) away from the operating point. If you are approached, immediately stop the engine.

2. The product is equipped with a centrifugal clutch mechanism, so the cutting attachment might begin to rotate as soon as the engine is started. When starting the engine, place the product onto the ground in a flat clear area and hold it firmly in place so as to ensure that neither the cutting p art nor the throttle come into contact with any obstacle when the engine starts.
   WA RNING
   Never p lace the throttle into the high- speed position when starting the engine. Never s tart the engine at the cutting attachment side.

3. After starting the engine, check to make sure that the cutting attachment stops rotating when the throttle is moved fully back to its original position. If it continues to rotate even after the throttle has been moved fully back, turn off the engine and take the unit to your authorized servicing dealer for repair.

USING THE PRODUCT

IMPORTANT
Cut only materials recommended by the manufacturer. And use only for tasks explained in the manual.

1. Grip the handles firmly with both hands using your whole hand. Place your feet slightly apart (slightly further apart than the width of your shoulders) so that your weight is distributed evenly across both legs, and always be sure to maintain a steady, even posture while working.
2.  Maintain the speed of the engine at the level required to perform cutting work, and never raise the speed of the engine above the level necessary.
3.  If the unit starts to shake or vibrate, turn off the engine and check the whole unit. Do not use it until the trouble has been properly corrected.
4. Keep all parts of your body away from rotating cutting attachment and hot surfaces.
5. Never touch the muffler, spark plug, or other metallic parts of the engine while the engine is in operation or immediately after shutting down the engine. Doing so could result in serious burns or electrical shock.
6. While operating the machine be always sure of a safe and secure operating position especially when using steps or a ladder.

IF SOMEONE COMES

1. Guard against hazardous situations at all times. Warn adults to keep pets and children away from the area. Be careful if you are approached. Injury may result from flying debris.
2. If someone calls out or otherwise interrupts you while working, always be sure to turn off the engine before turning around.

MAINTENANCE

1. In order to maintain your product in proper
   working order, perform the maintenance and checking operations described in the manual at regular intervals.

2. Always be sure to turn off the engine before performing any maintenance, checking procedures or working on the machine.
   WARNING
   The metallic parts reach high temperatures immediately after stopping the engine.

3. When replacing the cutting attachment or any other part, or when replacing the oil or any lubricant, always b e sure to use only ORIGINAL products which have been certified by the manufacturer.

4. In the event that any part must be replaced or any maintenance or repair work not described in this manual must be performed, please contact a representative from the store nearest authorized servicing dealer for assistance.

5. Do no t use any accessory or attachment other than those which the manufacturer recommends and recommended for the unit.

6. Under no circumstances should you ever take apart the product or alter it in any way. Doing so might result in the product becoming damaged during operation or the product becoming unable to operate properly.

HANDLING FUEL

1. The engine is designed to run on a mixed fuel, which contains highly flammable gasoline. Never store cans of fuel or refill the tank of the unit in any place where there is a boiler, stove, wood fire, electrical sparks, welding sparks, or any other source of heat or fire which might ignite the fuel.
2. Never smoke while operating the unit or refilling its fuel tank.
3. When refilling the tank, always turn off the engine and allow it t o cool down. Take a careful look around to make sure that there are no sparks or open flames anywhere nearby before refueling.
   • Refill after cooling the engine.
4. Wipe s pilled fuel completely using a dry rag if any fuel spillage occurs during refueling.
5. After refueling, screw the fuel cap back tightly onto the fuel tank and then carry the unit to a spot 3 m or more away from where it was refueled before turning on the engine.
6. Do no t inhale fuel fumes as they are toxic.

TRANSPORTATION

1. When hand-carrying the product, cover over the cutting part if necessary, lift up the product and carry it paying attention to the blade.
2. Never transport the product over rough roads over long distances by vehicle without removing all fuel from the fuel tank .
   If doing s o, fuel might leak from the tank during transport.

FUEL

WARNING
Gasoline is very flammable. Avoid smoking or bringing any flame or sparks near fuel. Make sure to stop the engine and allow it cool before refueling the unit. Select outdoor bare ground for fueling and move at least 10 ft (3 m) away from the fueling point before starting the engine.

GASOLINE REQUIREMENTS

All 2-Stroke Products are powered by Professional-Commercial Duty, Hi- Performance, Hi-RPM, Air Cooled 2-Stroke engines.
Hi-Performance 2-stroke engines produce higher HP outputs as compared to standard Home Owner Duty or Light Commercial Duty production engines offered by most manufacturers. Exhaust emission are controlled by the fundamental engine parameters and components (eq., carburation, ignition timing and port timing) without addition of any major hardware or the introduction of an inert material during combustion.

IMPORTANT
Gasoline/Oil mixture Storage Recommendations Store your gasoline or gasoline/oil mixture in a cool dry area in a tightly sealed approved container to limit the entry of moisture and additional air (oxygen). Moisture and air cause the development of varnish and gum, making the fuel stale. Stored gasoline and gasoline/oil mixture ages and loses its octane rating and volatility. Do not mix more gasoline/oil than you intend to use in 30 days, and 60 days when fuel stabilizer is added. Premium two-stroke engine oil “Contains fuel stabilizer” and will automatically extend your gasoline/oil mixture life up to 60 days.

HOW TO MIX FUEL

RECOMMENDED MIXING RATIO GASOLINE 25 : OIL 1
Mix a regular gasoline(leaded or unleaded, Alcohol-free) and a quality-proven motor Oil for air cooled 2 cycle engines.

25:1 MIXING CHART

WARNING

Pay attention to agitation

1. Measure out the quantities of gasoline and oil to be mixed.
2. Put some of the gasoline into a clean, approved fuel container.
3.  Pour in all of the oil and agitate well for 10seconds.
4. Pour in the rest of gasoline and agitate again for at least one minute. As some oils may be difficult to agitate depending on oil ingredients, sufficient agitation is necessary. Be careful that, if the agitation is insufficient, there is an increased danger of early piston seizure due to abnormally lean mixture.
5. Place a clear indication on the outside of the container to avoid mixing up with gasoline or other containers that dont contain oil.
6. Indicate the contents on outside of container for easy identification.

FUELING THE UNIT

1. Untwist and remove the fuel cap. Rest the cap on a clean surface.
2. Put fuel into the fuel tank to 80% of the full capacity.
3. Fasten the fuel cap securely and wipe up any fuel spillage around the unit.

WARNING

1. Select flat and bare ground for fueling.
2. Move at least 10 feet (3 meters) away from the fueling point before starting the engine.
3. Stop the engine before refueling the unit. At that time, be sure to sufficiently agitate the mixed gasoline in the container.

FOR YOUR ENGINE LIFE, AVOID

1. FUEL WITH NO OIL (RAW GASOLINE) – It will cause severe damage to the internal engine parts very quickly.
2. GASOHOL – It can cause deterioration of rubber and/or plastic parts and disruption of engine lubrication.
3. OIL FOR 4-CYCLE ENGINE USE – It can cause spark plug fouling, exhaust port blocking, or piston ring seizure.
4. Mixed fuels which have been left unused for a period of one month or more may clog the carburetor and result in the engine failing to operate properly.
5. In the case of storing the product for a long period of time, clean the fuel tank after rendering it empty. Next, Start the engine and run the carburetor dry residual fuel.
6. In the case of scrapping the used mixed oil container, scrap it only at an authorized depository site.

NOTE
As for details of quality assurance, read the description in the section Limited Warranty carefully. Moreover, normal wear and change in product with no functional influence are not covered by the warranty. Also, be careful that, if the usage in the instruction manual is not observed as to the mixed gasoline, type of oil or fuel to be used. Described therein, it may not be covered by the warranty.

Operation

STARTING ENGINE

WARNING
Keep the blades clear of the surrounding as they will start moving upon starting of the engine.

1. When first starting up after putting fuel into the machine, push the priming pump until fuel runs out in the clear tube. Then close the choke. Choking may not be necessary when re-starting right after stopping the engine. (OP1)

   • Primer pump
   • Choke lever
   • CLOSE
   • OPEN

2. Pull the throttle lever and push the lock button to set the lever in the START position. (OP2)

   • Throttle lever
   • Lock button

3. Slide the ignition switch to the engine side to set it in the ON position. (OP3)

4. Rest the unit on a firm place. Pull the starter knob quickly. (OP4)
   NOTE Avoid pulling the rope to its end or returning it by releasing the knob. Such actions can cause starter failures.

5. When the engine has started, gradually open the choke.

6. Allow the engine to warm up for a half minute before starting operation.
   NOTE If the engine won’t start after several attempts, open the choke and repeat pulling the rope or remove the spark plug and dry it.

STOPPING ENGINE

1. Release the throttle lever and run the engine at idling speed for a half minute.
2. Slide the ignition switch to the STOP Position.

IMPORTANT Except for an emergency, avoid stopping the engine while pulling the throttle lever.
NOTE If the engine won’t stop when setting the ignition switch to the stop position, close the choke lever and stop the engine.
In this case, please repair the machine at your nearest servicing dealer.

ADJUSTING IDLING SPEED

1. When the engine tends to stop frequently at idling mode, turn the idle set screw clock-wise.

NOTE

1. Idle set screw
2. When the cutting blades keep moving after releasing the throttle trigger, turn the idle set screw counter-clockwise.  Warm up the engine before adjusting the idling speed.

HOW TO USE

• This machine is designed so as to cut twigs up to 28 mm (0.3 inches) thick. Cutting too thick twigs or metal wires can not only break the blade teeth but also give damage to the drive mechanism.

• When trimming leaves and thin twigs, guide the blades as drawing a half circle on the surface, and you will get a better finish.
  Running the engine at high speed with the blades Jammed up can shorten the life of clutch parts. When the blades have been jammed by thick twigs, stop operation at once and draw your unit off the objects after stopping the engine. When clipping comparatively thick twigs, move your unit slowly back and forth like a saw, and they can be cut to a fine finish.

• When a new unit is first operated, in the first few minutes grease may come out of the gear case. But, since this is excess grease, there is no cause for alarm. For next use just wipe it off with the engine stopped.

HEDGE TRIMMING TECHNIQUES

Trim sides of a hedge first, and then the Top

Vertical cut:

• With the 2-sided blade model use an arcing cut from the bottom upwards, then downwards to use both sides of the blades (OP7).

Horizontal cut:

• In order to get the best cutting results, slightly tilt the blade (5°–10°) towards the cutting direction (OP8). Cut slowly, especially with thick hedges.

WARNING
Always follow the safety precautions.
The hedge-trimmer must only be used to trim hedges or small bushes. It is forbidden to cut other types of material. Do not use the hedge-trimmer as a lever to lift, move or break objects, nor lock it on fixed supports. It is forbidden to apply tools or applications that are not the ones indicated by the manufacturer onto the hedge-trimmer’s power take-off. Do not use it for pruning trees or cutting grass.

Maintenance

Maintenance, replacement, or repair of the emission control device and systems may be performed by any non-road engine repair establishment or individual.

MAINTENANCE CHART

| System/components| Procedure| Before use| Every
25
Hours after| Every
50
Hours after| Every100 Hours after| Note
---|---|---|---|---|---|---|---
Engine| fuel leaks, fuel spillage| wipe out| | | | |
fuel tank, air filter, fuel filter| inspect/clean| | | | | replace, if necessary
idle adjusting screw| see adjusting idling speed| | | | | replace carburetor
if
necessary
spark plug| clean and readjust plug gap| | | | | GAP : 0.65 mm
replace, if necessary
cylinder fins, intake air cooling vent| clean| | | | |
muffler, spark arrest r, cylinder exhaust port| clean| | | | |
Trimmer| throttle lever, ignition switch| Check operation| | | | |
cutting parts| replace if
something’s wr  g| | | | |
gear case| grease| | | | |
screws/nuts/bolts| tighten/replace| | | | | not adjusting screws
debris guard| make sure to attach| | | | |

WARNING
Make sure that the engine has stopped and is cool before performing any service to the machine. Contact with moving cutting head or hot muffler may result in a personal injury.

AIR FILTER

• The air filter, if clogged, will reduce the engine performance. Check and clean the filter element in warm, soapy water as required. Dry completely before installing. If the element is broken or shrunk, replace with a new one. (MA1)

FUEL FILTER

When the engine runs short of fuel supply, check the fuel cap and the fuel filter for blockage. (MA2)

SPARK PLUG

• Starting failure and mis-firing are often caused by a fouled spark plug. Clean the spark plug and check that the plug gap is in the correct range. For a replacement plug, use the correct type

REPLACEMENT PLUG IS LD L8RTF

IMPORTANT

• Note that using any spark plug other than those designated may result in the engine failing to operate properly or in the engine becoming overheated and damaged.
• To install the spark plug, first turn the plug until it is finger tight, then tighten it a quarter turn more with a socket wrench.
  • TIGHTENING TORQUE:
  • 87~121 in-lbs
  • (9.8~13.7 N.m.)

MUFFLER

IMPORTANT

• Inspect periodically, the muffler for loose fasteners, any damage or corrosion. If any sign of exhaust leakage is found, stop using the machine and have it repaired immediately.
• Note that failing to do so may result in the engine catching on fire.

Maintenance SPARK ARRESTER (MA4)

• The muffler is equipped with a spark arrester to prevent red hot carbon from flying out of the exhaust outlet.
  Periodically inspect and clean as necessary with a wire brush.
  In the State of California it is required by law (Section 4442 of the California Public Resources Code) to equip a spark arrester when a gas powered tool is used in any forest covered, brush covered, or grass covered unimproved and.

  • Spark arrester INTAKE AIR COOLING VENT

WARNING

• Never touch the cylinder, muffler, or spark plugs with your bare hands immediately after stopping the engine. The engine can become very hot when in operation, and doing so could result in severe burns.
• Clean the cylinder fins with compressed air or a brush. (MA5)
  •  Cylinder
  • Intake air cooling vent (back) IMPORTANT
    If waste gets stuck and causes blockage around the intake air cooling vent or between the cylinder fins, it may cause the engine to overheat, and that in turn may cause mechanical failure on the part of the hedge-trimmer.

BLADES

Oil blades each gas tank filling.(MA6)

WARNING

• Make sure that the blade bolts are well tightened.

•  The blade assembly is designed to automatically compensate for any play between the blades. Sharpening (MA7)
  Always keep the file or sharpener at an
  angle of 45° to the blade, and:

• Always grind in the direction of the cutting edge;

• Note: files cut only in one direction; lift the file from the blade when returning to start a new pass;

• Remove all burr from the edge of the blade with a slip stone;

• Remove as little material as possible;

• Before refitting the sharpened blades, remove filings and then apply grease.

• Do not try to sharpen a damaged blade: change it or take it to a Service dealer.

REDUCTION GEARBOX
Refill gear housing every 25 working hours. Use greese pump. Feed greese until itcomes out of the base of blades. (MA8)
PROCEDURES TO BE PERFORMED AFTER EVERY 100 HOURS OF USE

1. Remove the muffler, insert a screwdriver into the vent, and wipe away any carbon buildup. Wipe away any carbon buildup on the muffler exhaust vent and cylinder exhaust port at the same time.
2. Tighten all screws, bolts, and fittings.
3. Check to see if any oil or grease has worked its way in between the clutch, lining and drum, and if it has wipe it away using oil-free, lead-free gasoline.

Storage

1. Oil the blade to prevent rust.
2. Empty the fuel tank and put the cap back on.
3. Remove the spark plug, pour a small amount of oil into the cylinder.
4. Rotate the crankshaft several times using the starting rope in order to distribute the oil. Put the spark plug back in.
5. Wrap the engine with a plastic sheet.
6. Store the trimmer in a dry place, preferably not in direct contact with the floor and away from heat sources.

Disposal

• When disposing your machine, fuel or oil for the machine, be sure to allow your local regulations.

Troubleshooting guide

Case 1. Starting failure

normal range
sparking (no spark)| →| spark plug is fouled/wet| →| clean/dry
| →| plug gap is incorrect| →| correct (GAP: 0.65 mm)
spark plug| →| disconnected| →| retighten

Case 2. Engine starts but does not keep running/Hard re-starting

correct fuel
carburetor adjustment screw| →| out of normal range| →| adjust to normal range
muffler,cylinder (exhaust port)| →| carbon is built-up| →| wipe away
air cleaner| →| clogged with dust| →| wash
cylinder fin, fan cover| →| clogged with dust| →| clean

When your unit seems to need further service, please consult with our service shop in your area.

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