Zenoah EHT752S, EHT602D User Manual

Page 1
eHT752S / eHT602D
OWNER’S MANUAL
HEDGE TRIMMER
G
G B
B
eHT752S
eHT602D
GB-1
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eHT752S / eHT602D
EXPLANATION OF SYMBOLS AND SAFETY WARNINGS
eHT752S
WARNING!!!
RISK OF DAMAGING HEARING
Wear head, eye and ear protection.
eHT602D
WARNING!!!
RISK OF DAMAGING HEARING
Wear head, eye and ear protection.
MODEL
eHT752S eHT602D
SOUND LEVEL VIBRATION LEVEL
ISO 10884
LwA
measured
21.7 cm
21.7 cm
APPROVAL NUMBER OF CE EXHAUST EMISSION REGULATION
3
104.5 dB(A)
3
107.2 dB(A)
e13*97/68SH2G3*2002/88*0109*02
guaranteed
106 dB(A) 110 dB(A)
ISO 7916
racing
5.7 m/s
7.8 m/s
2
2
GB-2
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EC DECLARATION OF CONFORMITY
We, Husqvarna Zenoah Co., Ltd.
1-9, Minamidai, Kawagoe, Saitama, Japan
declare in sole responsibility that the following products referred to in this declaration conform with
DIRECTIVE 89/336/EEC, 98/37/EC
2000/14/EC Internal control production.
The products referred to are:
DESIGNATION : HEDGE TRIMMER
MODELS : eHT752S eHT602D
SERIAL NUMBERS : 50100001 and up
The company named above will keep on file the following technical docu­mentation for any inspection purpose.
• Operation instructions
• Plans and Drawings
• Description of measures designed to ensure conformity
• Other technical documentation : Specification sheet Inspection standard
eHT752S / eHT602D
G B
Saitama, Japan 1st December 2007
Masahiko GOUDA General Manager, Quality Assurance Department
SAFETY FIRST
Instructions contained in warnings within this manual marked with a 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.
WARNINGS IN THE MANUAL
This mark indicates instructions, which must be followed in or­der to prevent accidents, which could lead to serious bodily in­jury or death.
This mark indicates instructions, which must be followed, or it leads to mechanical failure, breakdown, or damage.
This mark indicates hints or directions useful in the use of the product.
symbol concern critical points which must be taken
WARNING
IMPORTANT
NOTE
Contents
1. Parts location .................................................. 4
2. Specifications ................................................. 4
3. Warning labels on the machine ...................... 5
4. Symbols on the machine ................................ 5
5. For safe operation ........................................... 6
6. Fuel ................................................................. 9
7. Operation ...................................................... 10
8. Maintenance ................................................. 12
9. Storage ......................................................... 15
10. Disposal ........................................................ 15
11. Troubleshooting guide .................................. 16
GB-3
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eHT752S / eHT602D
1. Parts location
1. Right handle
2. Fuel tank
3. Starter
4. Left handle
5. Throttle lever
6. Ignition switch
7. Throttle Cable
8. Muffler
9. Blade
10. Front handle
11. Rear handle
12. Plate receive
eHT602D
eHT752S
2. Specification
Model ........................................................................................... eHT752S / eHT602D
Type ................................................................................................ double-action type
eHT752S / eHT602D .................................................. Single blade / Double blade
Blade length (from the tip of Gear Case)
eHT752S / eHT602D ......................................................................... 670 / 530 mm
Engine
Model ............................................................................................. Zenoah G20LH
Displacement ........................................................................................... 21.7 cm
Carburetor .................................................................................... Diaphragm type
Ignition system ..................................................... I.C.controlled flywheel magneto
Spark plug ...................................................... Champion RCJ6Y or NGK BPMR7A
Fuel ............................................................................. mixture (Gasoline 50 : Oil 1)
(when using ZENOAH genuine oil)
Fuel tank capacity ................................................................................................. 0.4 L
Starter ...................................................................................................... Recoil starter
Clutch .................................................................................................. Centrifugal type
Reduction ratio
eHT752S / eHT602D .............................................................................. 4.78 / 4.78
Dry weight
eHT752S / eHT602D ......................................................................... 4.67 / 4.59 kg
Specifications are subject to change without notice.
3
GB-4
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3. Warning labels on the machine
If warning label peels off or becomes soiled and
(1)Read owner's manual before operat-
(1)
ing this machine.
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).
eHT752S / eHT602D
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(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 eas-
ily cause cuts.
4. Symbols on the machine
Never modify your machine. We won’t warrant the machine, if you use the remodeled hedge trimmer or if you don’t ob­serve
the proper usage written in the manual.
For safe operation and maintenance, symbols are carved in relief on the machine. According to these indications, please be careful not to make a mistake.
The port to refuel the “MIX GASOLINE” Position: FUEL TANK CAP
The direction to close the choke Position: AIR CLEANER COVER
The direction to open the choke Position: AIR CLEANER COVER
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eHT752S / eHT602D
5. For safe operation
GB-6
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.
(1) Helmet (2) Ear protectors (3) Protection goggles or face
protector (4) Thick work gloves (5) Non-slip-sole work boots
2. And you should carry with you. (1) Attached tools (2) Properly reserved fuel (3) Spare blade (4) Things to notify your working
area (rope, warning signs)
(5) Whistle (for collaboration or
emergency)
(6) Hatchet or saw (for removal of
obstacles)
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, a. when the ground is slippery
or when you can’t maintain a steady posture.
b. 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.
c. During rain, during 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.
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5. For safe operation
eHT752S / eHT602D
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 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 any 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 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 begins to move as soon as the engine is started by putting the throttle into the start position. 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 part nor the throttle come into contact with any obstacle when the engine starts.
WARNING
• Never place the throttle into the high-speed position when start­ing the engine.
• Never start the engine at the cut­ting attachment side.
3. After starting the engine, check
to make sure that the cutting at­tachment stops moving when the throttle is moved fully back to its original position. If it continues to move even after the throttle has been moved fully back, turn off the engine and take the unit to your authorized ZENOAH 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 vi-
brate, 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 moving cutting attachment and hot surfaces. Never touch the muffler, spark plug,
5.
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.
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eHT752S / eHT602D
5. For safe operation
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 be sure to use
only ZENOAH products or products which have been cer­tified by ZENOAH for use with the ZENOAH product.
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 ZENOAH authorized servicing dealer for assistance.
5. Do not use any accessory or at­tachment other than those bear­ing the ZENOAH mark 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 of the ZENOAH prod­uct 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 to cool down. Take a careful look around to make sure that there are no sparks or open flames any­where nearby before refueling.
4. Wipe spilled 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 not 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 so, fuel might leak from the tank dur­ing transport.
GB-8
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6. Fuel
eHT752S / eHT602D
FUEL
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 3 m (10 ft) away from the fueling point before starting the engine.
• The Zenoah engines are lubricated by oil specially formulated for air-cooled 2-cycle gasoline engine use. If Zenoah oil is not available, use an anti-oxidant added quality oil expressly labeled for air-cooled 2-cycle engine use (JASO FC GRADE OIL or ISO EGC GRADE).
• Do not use BIA or TCW (2-stroke water-cooling type) mixed oil.
RECOMMENDED MIXING RATIO
GASOLINE 50 : OIL 1
(when using ZENOAH genuine oil)
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.
• These engines are certified to operate on unleaded gasoline.
• Make sure to use gasoline with a minimum octane number of 89RON (USA/Canada: 87AL).
• If you use a gasoline of a lower octane value than prescribed, there is a danger that the engine tem­perature may rise and an engine problem such as piston seizing may consequently occur.
• Unleaded gasoline is recommended to reduce the contamination of the air for the sake of your health and the environment.
• Poor quality gasolines or oils may damage sealing rings, fuel lines or fuel tank of the engine.
HOW TO MIX FUEL
• Pay attention to agitation.
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 for the engine to last long. Be careful that, if the agitation is insufficient, there is an increased danger of early piston seizing due to ab­normally lean mixture.
5. Put a clear indication on the outside of the container to avoid mixing up with gasoline or other contain­ers.
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 dustless place.
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.
1. Select 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. GASOHOL – It can cause deterioration of rubber and/
2. 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 sticking.
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, activate the engine and empty the carburetor of the composite fuel.
6. In the case of scrapping the used mixed oil con­tainer, scrap it only at an authorized repository site.
• 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, etc. described therein, it may not be covered by the warranty.
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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.
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eHT752S / eHT602D
7. Operation
STARTING ENGINE
WARNING
The cutting head will start moving upon the engine starts.
1. Feed fuel into the fuel tank and tighten the cap se-
curely.
2. Rest the unit on a flat, firm place. Keep the cutting
head off the ground and clear of surrounding objects as it will start moving upon starting of the engine.
3. Push the primer several times until overflown fuel flows
out in the clear tube.
(a) Primer (b) Clear tube
4. When the engine is cool, move the choke lever to the
closed position.
6. While holding the unit firmly, pull out the starter rope quickly until engine fires.
IMPORTANT
•Avoid pulling the rope to its end or returning it by re­leasing the knob. Such actions can cause starter fail­ures.
7. Move the choke lever downward to open the choke. and restart engine.
8. Allow the engine to warm up for a several minutes before starting opertion.
NOTE
1. When restarting the engine immediately after stop­ping it, leave the choke open.
2. Overchoking can make the engine hard to start due to excess fuel. When the engine failed to start after several attempts, open the choke and repeat pulling the rope, or remove the spark plug and dry it.
(a) Choke lever (b) Open (c) Close
5. Set the ignition switch to the “RUN” position.
(c)
(d) (c)
b
a
(a) Throttle lever (b) Ignition switch (c) RUN (d) STOP
GB-10
a
d
b
STOPPING ENGINE
1. Release the throttle lever and run the engine for half a minute.
2. Shift 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.
Page 11
7. Operation
CUTTING WORK
WARNING
eHT752S / eHT602D
Weather conditions and altitude may effect
carburation.
Do not allow anyone to stay close to the hedge-
trimmer while working or while adjusting the car­buretor.
HOW TO USE : HANDLE (eHT602D)
To reduce fatigue when trimming hedges, the handle
can be swivelled through 90° to the left or right.
Do not press the throttle during this operation!
Proceed as follows:
1. Free the handle by pressing the locking lever.
2. Turn the handle until the locking lever clicks into place.
3. When the handle is locked in its new position, you can apply the throttle again.
(1) handle (2) locking lever
You can swivel the handle even with the engine
idling because the hedge-trimmer is equipped with a blade brake that maintains the blades at a standstill.
HEDGE TRIMMING TECHNIQUES
Trim sides of a hedge first, and then the top.
Vertical cut:
•With the single-sided blade hedge-trimmer, model eHT752S always cut from the bottom up.
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Horizontal cut:
• In order to get the best cutting results, slightly tilt the blade (5÷10°) towards the cutting direction.
Cut slowly, specially 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.
• Use only as much throttle as is needed to do the job. Excessive engine speed is unnecessary.
• Avoid cutting thick branches, for which will damage the blades and shorten the life of drive systems.
• Tilting the trimmer 5 to 10° to the cutting object will make the job easy and bring a good result.
• Always keep your body to the carburetor side of your trimmer, never on the muffler side.
• When a new machine 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. Just wipe it off with the engine stopped for next use.
• Always remember that the TIP of the line does cut­ting. You will achieve better results by not crowding the line into the cutting area. Allow the unit to trim at its own pace.
•With the 2-sided blade model eHT602D use an arc­ing cut from the bottom upwards, then downwards to use both sides of the blades.
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eHT752S / eHT602D
8. Maintenance
Every Every Every
System/components Procedure
fuel leaks, fuel spillage wipe out fuel tank, air filter, fuel filter inspect/clean ✔✔ replace, if necessary
idle adjusting screw
spark plug
ENGINE
cylinder fins, intake air cooling vent muffler, spark arrester, cylinder exhaust port throttle lever, ignition switch check operation
cutting parts
gear case grease
TRIMMER
screws/nuts/bolts tighten/replace ✔✔not adjusting screws debris guard make sure to attach
see adjusting replace carburetor idling speed if necessary clean and readjust GAP: 0.6 ~ 0.7 mm plug gap replace, if necessary clean clean
replace if something’s wrong
Before
use
25 50 100
hours hours hours
after after after
Note
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.
BLADE
• Check the blade and the fasteners for looseness, cracking, or bending.
• Check the cutting edges and reform with a flat file.
Point :
1. Keep the end corner sharp.
2. Round the root of the edge.
3. Do not use water when using a grinder.
You need not to adjust the gap between upper blade
and lower blade as this product is designed to have optimal gap when it is properly set up.
IMPORTANT
When mounting the blade, make sure to fasten the spacer, washer and bolt, then fasten the nut.
SHARPENING
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.
GB-12
(1) Bolt (2) Plate (3) Spacer (4) Nut
Page 13
8. Maintenance
eHT752S / eHT602D
SAFETY LOCK
WARNING
Stop operation when the safety lock is de-
fective.
• Safety lock is the device not to accelerate the throttle lever without intention. While pushing the safety lock, you can accelerate the throttle lever.
(1) Safety lock
1. Check if the throttle lever does not move when you do not push the safety lock.
2. Check if the throttle lever moves when you grasp or release it while pushing the safety lock.
3. Check if the safety lock returns to its original position when you release your hand from safety lock.
• If you find any defects at the checks above, contact your nearest servicing dealer for repair.
ANTI-VIBRATION SYSTEM
WARNING
The deformed or damaged anti-vibration system may
cause of the breakages like getting rickety or falling off of engine and/or blade .
• [eHT752S] Check periodically if the rubber cushions are not deformed or damaged.
• [eHT602D] Check periodically if the springs are not deformed or damaged.
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.
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FUEL FILTER
• When the engine runs short of fuel supply, check the fuel cap and the fuel filter for blockage.
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eHT752S / eHT602D
8. Maintenance
WAY OF THE COOLING AIR
• This engine is air-cooled. Dust clogging between the inlet port of the cooling air and cylinder fins will cause overheating of the engine. Periodically check and clean the cylinder fins after removing the air cleaner and the cylinder cover.
SPARK PLUG
• Starting failure and misfiring 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 specified by ZENOAH.
0.6~0.7 mm
REPLACEMENT PLUG IS A CHAMPION RCJ6Y or
NGK BPMR7A.
IMPORTANT
ADJUSTING CARBURETOR
The carburetor has been adjusted at the factory. Should your unit need readjustment due to the changes in alti-
tude or operating conditions, please let your skillful dealer make the adjustment. A wrong adjustment may cause damage to your unit.
(1) Idle adjusting screw (2) Up (3) Down (4) Fuel adjusting screw (Opening 1 ± 1/4) (5) Decrease (6) Increase
THROTTLE WIRE PLAY
Throttle wire play should be 1~2 mm. After completely returning the throttle lever, take the throttle wire at the carburetor end in your fingers and give a light tug. If the play is too great or too small, readjust the position of the wire retaining nut. Loosen the lock nut and turn the wire retaining nut clockwise (screw in) to increase the play and counter-clockwise (unscrew) to reduce it. After ad­justing, please fasten the wire retaining nut by tighten­ing the lock nut.
Note that using any spark plug other than those des-
ignated 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: 14.7 –21.5 N·m
GEAR CASE
• Supply multi-purpose grease at every 50 hours of use.
1. Use a grease pump.
2. Feed grease until it comes out of the base of blades.
(a) Grease nipple: A type
GB-14
a. lock nut b. wire retaining nut c. wire sleeve
Page 15
8. Maintenance
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.
eHT752S / eHT602D
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9. 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 start-
ing 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 indoors in a dry place, dust free
place, out of the reach of children, preferably not in direct contact with the floor and away from heat sources.
10. Disposal
When disposing your machine, fuel or oil for the machine, be sure to allow your local regulations.
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eHT752S / eHT602D
11. Troubleshooting guide
Case 1. Starting failure
CHECK PROBABLE CAUSES ACTION
fuel tank → incorrect fuel drain it and use correct fuel fuel filter fuel filter is clogged clean carburetor adjustment screw out of normal range adjust to normal range sparking (no spark) → spark plug is fouled/wet → clean/dry
plug gap is incorrect correct (GAP: 0.6 ~ 0.7 mm)
spark plug → disconnected → retighten
Case 2. Engine starts but does not keep running/hard re-starting
CHECK PROBABLE CAUSES ACTION
fuel tank → incorrect fuel or staled fuel → drain it and use 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 ZENOAH service shop in your area.
Limited warranty
Should any failure occur on the product under normal operating conditions within the applicable warranty pe­riod, the failed part will be replaced or repaired free of charge by a ZENOAH authorized dealer.
WARRANTY PERIOD: 1 year (6 months if used profes­sionally, and 30 days if used for rental purpose) from the date of initial purchase.
THE PURCHASER SHALL BEAR COSTS OF TRANS­PORTING THE UNIT TO AND FROM THE ZENOAH DEALER.
THE PURCHASER 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 THE ZENOAH DEALER.
THE PURCHASER OR OWNER IS RESPONSIBLE FOR THE PERFORMANCE OF THE REQUIRED MAINTE­NANCE AS DEFINED BY THE MANUFACTURER IN THE OWNER/OPERATOR MANUAL.
WARRANTY MAINTENANCE OR REPAIRS, AND SHALL NOT REDUCE THE WARRANTY OBLIGATION OF THE COMPANY.
THE COMPANY IS LIABLE FOR DAMAGES TO OTHER ENGINE COMPONENTS CAUSED BY THE FAILURE OF A WARRANTED PART STILL UNDER WARRANTY.
THE WARRANTY DOES NOT APPLY TO THOSE UNITS WHICH HAVE BEEN DAMAGED BY NEGLIGENCE OF INSTRUCTION LISTED IN THE OWNER/OPERATOR MANUAL FOR PROPER USE AND MAINTENANCE OF THE UNITS ACCIDENT MISHANDLING, ALTERATION, ABUSE, IMPROPER LUBRICATION, USE OF ANY PARTS OR ACCESSORIES OTHER THAN THOSE SPECIFIED BY THE COMPANY, OR OTHER CAUSES BEYOND THE COMPANY’S CONTROL.
THIS WARRANTY DOES NOT COVER THOSE PARTS REPLACED BY NORMAL WEAR OR HARMLESS CHANGES IN THEIR APPEARANCE.
THERE ARE NO OTHER EXPRESS WARRANTIES.
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 THE WARRANTY PERIOD. ANY WARRANTED PART WHICH IS SCHEDULED FOR REPLACEMENT AS REQUIRED MAINTENANCE SHALL BE WARRANTED FOR THE PE­RIOD OF TIME UP TO THE FIRST SCHEDULED REPLACEMENT POINT FOR THE PART.
ANY REPLACEMENT PART THAT IS EQUIVALENT IN PERFORMANCE AND DURABILITY MAY BE USED IN NON­GB-16
IMPLIED WARRANTIES INCLUDING THOSE OF MER­CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO TWO (2) YEARS OF HOME USE [ONE (1) YEAR FOR ANY OTHER USE] FROM THE ORIGINAL DELIVERY DATE.
LIABILITIES FOR INCIDENTAL OR CONSEQUENTIAL DAMAGE UNDER ANY AND ALL WARRANTIES ARE EXCLUDED.
IF YOU NEED TO OBTAIN MORE INFORMATION, PLEASE CALL YOUR NEAREST SERVICE CENTER, OR CHECK PLEASE ZENOAH WEB SITE http://www.zenoah.net
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