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LIFAN Power USA 2V77F, Manual

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LIFAN Power USA 2V77F Manual Download Page 36

 

36 

WARNING: 

●

 

When testing the spark plug, never hold the high- voltage wire of the spark plug with wet hand. 

●

 

Make sure there is no spilled fuel outside the engine and that the spark plug isn’t dipped with fuel. 

●

 

To prevent fire, keep sparks far away from the spark plug mount hole. 

Ⅱ

. Low gasoline engine power output 

TROUBLE 

CAUSE 

REMEDY 

When turning 
throttle greater, 
speed increase 
responds 
slowly or speed 
is decreased 
even engine 
stops running. 

Ignition 
system 

Incorrect ignition time. 

Readjust 

ignition 

advance 

angle 

Fuel 
supply 
system 

Air in fuel line or fuel line clogged. 

Exhaust air or dredge fuel line 

Main oil flow hole is not adjusted properly. 

Readjust 

In  carburetor,  needle  valve  hole  and  main  oil  flow 
hole clogged. 

Clean and blow to get through 

Fuel cock is clogged up. 

Clean, replace damaged part 

Too much carbon deposit in combusting chamber. 

Clear away 

Too much car bon fouling in muffler and exhaust pipe.  Clear away 

Air cleaner is clogged up. 

Clean air cleaner filter elemei   

Intake pipe is leaking. 

Repair or replace 

Poor 
compres
sion 

Piston or cylinder or piston ring is worn. 

Replace the worn   

Air leakage from the surface by which cylinder block 
contacting with cylinder head. 

Replace cylinder gasket 

Too big or too small valve clearance. 

Readjust   

Valve tightness is poor. 

Repair   

Summary of Contents for 2V77F

Page 1: ...1 ...

Page 2: ...m avoiding the suddenly damage caused by bad lubrication The manual gives information about the operation and maintenance of gasoline engine 2V77F and 2V77F A 2V77F is started by electricity while 2V77F A is started by electricity or manual Please read it carefully before operating To extend the service life users should strictly follow the stipulations stated in the manual to carry out operating ...

Page 3: ...may result in injury to or death of personnel if not strictly observed CAUTION A caution is used to alert the user to fact that hazardous operation and maintenance procedures may result in injury to personnel or destruction of equipment if not strictly observed NOTE Give helpful information This manual should be considered as a permanent part of the unit and should remain with the unit when resold...

Page 4: ...TION 10 PRE OPERATE INSPECTION 12 Ⅰ Engine oil 12 Ⅱ Air cleaner 13 Ⅲ Fuel and fuel tank 14 STARTING THE ENGINE 15 RUNNING THE ENGINE 17 Ⅰ Engine oil alarm 17 Ⅱ Breaker 18 STOP 19 EXHAUST CONTROL SYSTEM 20 MAINTENANCE 22 Ⅰ Maintenance schedule 22 Ⅱ Maintenance method 23 TRANSPORT STORAGE AND REMOVAL FROM STORAGE 32 TROUBLESHOOTING 34 ...

Page 5: ...ngine cannot run smoothly 37 Ⅳ Stop suddenly when running 38 Ⅴ Gasoline engine is excessively hot 39 Ⅵ There exists abnormal noise when engine running 40 SPECIFICATIONS 41 Ⅰ Main specification 41 Ⅱ Torque of important bolts 42 Ⅲ Fitting clearance and wear limit 43 ELECTRIC DIAGRAM 44 ...

Page 6: ...f the engine has been specially trained 6 Refuel in a well ventilated area with the engine stopped and in places refueling or storing gasoline no smoking and any flames or sparks 7 Refuel the fuel tank not too full so as to avoid fuel s spilling out If there is spilled fuel around be sure to clean it thoroughly before starting 8 Locate the engine on a level working platform to avoid fuel s spillin...

Page 7: ...7 PARTS DESCRIPTION Fig 1 ...

Page 8: ...he battery may give off explosive gas keep sparks flames and cigarettes away Charge or use it in an area with good ventilation The battery contains sulfuric acid electrolyte Contact with skin or eyes may cause severe burns Wear protective clothing and a face shield If electrolyte gets in your skin flush with water if gets in your eyes flush with water for at least 15 minutes and call a physician a...

Page 9: ...ife will be shortened Do not add distilled water over electrolyte upper level mark or electrolyte will spill out to corrupt the engine parts If so be sure to wash them away with water Make sure not to connect the battery leads in reverse order or short circuit or breaker s cutting may occur ...

Page 10: ...TION Throttle and choke levers are designed with holes for optional cable accessories 1 The diagram shows the installation method of single strand cable and woven cable a Remote controlled choke valve and Remote controlled throttle valve Fig 3 ...

Page 11: ...trolled throttle valve and Manually controlled choke valve c Manually controlled throttle valve and Manually controlled choke valve 2 Put the levers of both the choke and throttle on the controlled pedestal Fig 4 Fig 5 ...

Page 12: ...ne when it on a level ground Recommended engine oil SAE10W 30 As viscosity varies with regions and temperatures so the lubricant has to be selected in accordance with our recommendation CAUTION Use cleanser free oil or two stroke engine oil will shorten the machine s life Check steps 1 Ensure that the engine is stops on a level ground 2 Remove the dipstick Fig 7 and clean it 3 Reinsert the dipstic...

Page 13: ...nstall oil plug and dipstick CAUTION 1 Run with insufficient engine oil may severe damage the engine 2 Please stop the engine and check it on ground level Ⅱ Air cleaner Dismantle the air cleaner cover Fig 8 and check its filter element make sure it clean and intact Otherwise clean or replace it ...

Page 14: ...r housing Ⅲ Fuel and fuel tank The engine must apply unleaded gasoline with an octane number over 86 Using unleaded gasoline will decrease the possibility of producing carbon deposit and will prolong the engine s service life Never apply used or polluted gasoline or a mixture of gasoline with engine oil Make sure the fuel is free of dirt and water ...

Page 15: ...er to CLOSE Fig 10 3 Push the throttle to FAST slowly 4 Start the engine as follows a Hand operated kick starter Pull slightly the starting rope handle up until feeling anti action and then make a rapid pull CAUTION Releasing the handle suddenly may make it hitting the engine Release the handle slowly conforming with its recoiling force Fig 9 Fig 11 Fig 10 Fig 12 ...

Page 16: ...h to START and keep 5 seconds to make it start CAUTION Use the engine switch not than 5 minutes each time to avoid damage of the engine Try again 10 seconds later after last attempt failures Once engine starts push the engine switch to ON Fig 13 ...

Page 17: ...o ensure the engine runs at required velocity Ⅰ Engine oil alarm The engine oil alarm is designed to function when the engine oil in the crankcase is insufficient Lack of engine oil may damage the engine Once oil level in the crankcase is too low the engine oil alarm will stop the engine automatically to make it free of damage while the engine switch is still at ON Fig 14 Fig 15 ...

Page 18: ...ively too big so the engine performance may be impaired while the fuel consumption may increase besides too big mixture ratio will pollute the spark plug and result in starting the engine difficultly This problem can be solved by amending the carburetor technological status If always using on highlands with at 1800 meters above sea level ask your dealer for help However the engine power will decre...

Page 19: ...lly stop it in the following steps 1 Push the throttle lever to SLOW slowly Fig 16 2 Push the engine switch to OFF Fig 17 3 Set the fuel cock to OFF Fig 18 Option CAUTION Never sudden stopping at high speed with heavy load is otherwise it will damage the engine Fig 16 图 17 Fig 18 ...

Page 20: ... Maintenance Maintain the engine periodically in accordance with the maintenance schedule in the manual The maintenance schedule is made out on the base of normal use in normal conditions if using under heavy load dusty or wet circumstances or in high temperature service of the engine should be done more often 2 Replacement of parts We recommend that you should choose the parts which are manufactu...

Page 21: ... to result in the engines running beyond the set parameters 4 Problems affecting exhaust emissions 1 Starting or stopping difficult 2 Unstable idling 3 Give off back smoke or consume too much fuel 4 Under the condition of load poor ignition sparks or sparks returned 5 Ignite too early Once you find any of above problem contact your dealer for help ...

Page 22: ...h time First month or 20 hrs Each season or 50 hrs Every 6 month or 100 hrs Each year or 300 hrs Engine oil Oil level check Replace Air cleaner Check Clean Replace Spark plug Clean adjust Replace Spark eliminator Clean Idling Check adjust Valve clearance Check adjust Oil filter Replace 或 200 hrs fuel filter Clean Fuel supply line Check Every two years do a replacement if necessary Frequency Item ...

Page 23: ...lly trained and is well equipped with tools Ⅱ Maintenance method 1 Replacement of engine oil checking method please refer to P 11 Let the oil to flow out of gasoline engine when it under the hot condition and make sure that the flow is fast and complete 1 Turn off the oil filler cap Fig 19 and drain plug Fig 20 to drain engine oil thoroughly Reinstall the drain plug and screw securely 2 Fill the s...

Page 24: ... onto the ground For the sake of environmental protection we suggest you throw the discarded engine oil into a closed container and bring to local recycling station 2 Replacement of oil filter 1 Exhaust engine oil 2 Use the spanner to disassembly the oil filter to exhaust the remained oil 3 Clean the oil filter housing Fig 19 Fig 20 ...

Page 25: ...filter should be fixed by the tensional spanner which followed by specified angle or torque Torsional angle 7 4r Torque 22N m 3 Maintenance of air cleaner A dirty air cleaner will limit the air into the carburetor To keep the carburetor in good working conditions please Maintenance the air cleaner periodically If operating the engine in extremely dusty area the job should be done more often Fig 21...

Page 26: ...Never run the engine without an air cleaner or dirt and dust may enter the engine so speed the engine s wear 1 Loosen the four iron hinges dismantle the air cleaner cover Fig 22 and check carefully if the two filter element are damaged if the are please change a new 2 If you want to use them again please clean the filter element Fig 22 ...

Page 27: ...30 psi Never clean with a brush as brushing may force the dust into the core fiber If the core is extremely filthy replace with a new one 3 Clean the dust in the air cleaner cover avoid it enter the air intake of the carburetor 4 Reinstall the filter element and air cleaner housing and fix the iron hinges 4 The maintenance of spark plug Spark plug type BPR6ES NGK or NHSP LD F7RTC CAUTION Never use...

Page 28: ...ould be rejected If this spark plug will be used again use steel brush to clean it 3 Measure the spark plug clearance with a feeler The clearance should be 0 7 0 8mm If adjustment is necessary bend the side electrode carefully Fig 24 4 Please check if the spark plug mat is in good condition screw it by hand 5 When the spark plug is in place revolve it by spark plug wrench and impact gasket Fig 25 ...

Page 29: ... the engine Use the recommended spark plug or the equivalent Incorrect heat range of the spark plug may damage the engine 5 Spark eliminator option The spark eliminator should be serviced at least once every 100 hour s operation so as to keep it in a sound condition WARNING The muffler is very hot during running the engine and even a long time after stopping Never touch it or you may get burned Se...

Page 30: ... away carbon deposit from the spark eliminator mesh with a brush CAUTION Be careful and do not damage of the spark eliminator mesh NOTE Sparkle eliminator can never be damaged otherwise please use a new one 3 Install sparkle eliminator and muffler in term of the order of disassembly Fig 26 ...

Page 31: ...cial bolt from the cover of switch box and remove the cover Fig 27 2 Pull out broken fuse from pedestal by hand and the insert new fuse NOTE Don t use the fuse different form rate specification Or it will make the circuitry seriously mangled or cause a fire Before checking or changing a fuse sever ignition switch and pull out the key in order to prevent short circuit Fig 27 ...

Page 32: ... hard starting maintain procedure suggestion Within one month Non One two months Drain out original fuel of the fuel tank and refuel Two month one year Drain out original fuel of the fuel tank and refuel Drain out fuel in the carburetor Empty the deposit cup Above one year Drain out original fuel of the fuel tank and refuel Drain out fuel in the carburetor Empty the deposit cup Move the engine fro...

Page 33: ... engine oil 4 Disconnect the spark plug Fill about a spoon of fresh engine oil from the spark plug mount hole onto the cylinder Crank the engine up to distribute engine oil evenly Reinstall the spark plug 5 Electric start type disconnect the battery and store in dry and cool area Charge one time every month 6 Cover the engine to keep dust away Fig 28 ...

Page 34: ...ough fuel in fuel tank or fuel cock is closed Fill fuel open fuel cock Air vent in the fuel filler cap is clogged Dredge air vent Fuel cock is clogged Clean first and then dredge Improper or clogged main oil flow hole Readjust or clean blow to get through Needle valve is not closed properly or start hole is clogged Dismantle needle valve and repair clean blow to get through Float is damaged or sti...

Page 35: ...orma l compress ion of cylinder normal fuel supply system Normal ignition system Piston ring is worn to or even over its wear limit Replace Piston ring is broken Replace Piston ring is sticking Clear up carbon fouling Spark plug is not installed tighten or without a gasket Tighten with a gasket in Air leakage between cylinder block and cylinder head Check cylinder gasket and the flatness of the su...

Page 36: ...uel line or fuel line clogged Exhaust air or dredge fuel line Main oil flow hole is not adjusted properly Readjust In carburetor needle valve hole and main oil flow hole clogged Clean and blow to get through Fuel cock is clogged up Clean replace damaged part Too much carbon deposit in combusting chamber Clear away Too much car bon fouling in muffler and exhaust pipe Clear away Air cleaner is clogg...

Page 37: ...bearing for crankshaft main shaft is worn Replace roller bearing Abnormal combustion Engine is too hot Shoot trouble Too much carbon deposit in combustion chamber Clear away Improper gasoline brand or low gasoline quality Replace with qualified gasoline Engine cannot start because of spark lacking There is water in float chamber Clean Improper spark plug electrodes clearance Adjust Incorrect ignit...

Page 38: ...liminate it Ignition system Spark plug is struck through or short circuited by carbon deposit Replace spark plug Side electrode of spark plug is dropped out Replace spark plug High pressure wire is dropped out Weld on Ignition coil is struck through to be short circuited Replace ignition coil Parking wire is located on engine body Find out meeting and insulate The other Cylinder is pulled damage v...

Page 39: ...ion makes piston and cylinder bushing side wear Replace tie rod Cylinder or piston or piston ring is worn resulting in air flow between cylinder and crankcase Replace the worn Improper adjustment of engine speed produces excessive rotational speed Readjust engine speed to proper valve by speed regulator Crankshaft main bearing is burnt out Replace main bearing NOTE the gasoline should run under cr...

Page 40: ...There is metal beaten noise in abnormal combustion Too much carbon deposit in combusting chamber Clear away carbon deposit Too small electrode clearance of spark plug Adjust electrode clearance properly Engine is flooded with fuel Check relative parts such as carburetor Improper fuel brand Replace fuel Engine is excessively hot Find a cause and eliminate it The other Improper valve clearance Readj...

Page 41: ...7PS 3600rpm Recommend power using 12kW 16 3PS 3600rpm 12 5kW 16 3PS 3600rpm Max torque 40N m 2 500rpm 42N m 2 500rpm Ignition system Non contract transistorized ignition TCI Start Model Electric Electric Manual Electric Air cleaner Semi dry or oil bath type Lubricating model Pressure sputtering Fuel consumption 370g kw h Oil capacity 1 4L Dimensions L W H 455mm 400mm 450 mm 455mm 460 mm 450 mm 455...

Page 42: ... Measure according to ISO 8528 10 EN ISO 3744 European Directive 2000 14 EC and the noise was tested Max sound pressure level at rated torque was max 98dB A Sound Power Level 110dB A Ⅱ Torque of important bolts Item Specifications Torque valve N m kg m Tie rod bolt M8 1 25 special 14 1 4 Cylinder head bolt M8 1 25 34 3 5 Flywheel nut M20 1 5 special 113 11 5 Lock nut of rocker arm shaft M6 0 75 10...

Page 43: ... scraper ring 2 4 2 3 10 Piston ring gap 0 2 0 4 1 0 11 Scraper ring gap 0 2 0 7 1 0 12 Inner dia of tie rod big end 40 041 40 09 13 Inner dia of tie rod small end 18 017 18 07 14 Oil clearance of tie rod big end 0 040 0 066 0 12 15 Side clearance of tie rod big end 0 1 0 7 1 0 16 Dia of crankshaft 37 959 37 91 17 Clearance of intake valve 0 15 0 02 18 Clearance of exhaust valve 0 20 0 02 19 Dia o...

Page 44: ...44 ELECTRIC DIAGRAM ...

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