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30 

. LOW GASOLINE ENGINE POWER OUTPUT 

TROUBLE 

CAUSE 

REMEDY 

 
 
When 

turning 

throttle 

greater, 

speed 

increase 

responds  slowly  or  speed  is 
decreased even engine stops 

Ignition   

Incorrect ignition time 

Readjust 

ignition 

advance angle 

 
Fuel 

supply 

system 

Air  in  fuel  line  of  fuel  line 
clogged. 

Exhaust air or dredge 
fuel line 

Main jet is not adjusted 
Properly. 

Readjust 

In  carburetor,  needle  valve 
hole and main jet clogged 

Clean  and  blow  to 
get through 

Fuel cock is clogged up 

Clean, replace 
Damage part. 

Too  much  carbon  fouling  in 
combusting chamber 

Clear away 

Air cleaner is clogged up. 

Clean filter element 

 

 

 

 

 

Summary of Contents for 62027

Page 1: ...OWNER S MANUAL GENERAL GASOLINE ENGINE 62027 62029 ...

Page 2: ...ine surface and manufacturing accuracy obviously Applying auto press reducing system and centrifugal fly hammer regulating system assure that assemblies equipped with the engine function smoothly and reliably as well as the engine start easily Besides the introduction of the lubricant film sensing protection system prevents accidental damage of the engine for poor lubrication The manual gives info...

Page 3: ...ath 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 or death of personnel if not strictly observed NOTE A note is used to give helpful information This manual book is the part of engine it must be along with the engine ...

Page 4: ...il in the reduction gearbox only for equipped model 8 III Air cleaner 9 IV Fuel 9 Starting of the Engine 11 Operation 13 Engine Oil Alarm 14 Breaker electric start type 14 Operating on Highlands 15 Stop 16 Exhaust Control System 17 Maintenance 19 I Maintenance schedule 19 II Maintenance method 20 ...

Page 5: ...of the air cleaner 21 3 Washing of Deposit Cup 22 4 Maintenance of the spark plug 22 5 Maintenance of the Spark Plug Option 24 6 Adjustment of Carburetor Idling 25 Transport and Storage 26 Troubleshooting 36 Specifications 37 Electric Diagram 39 ...

Page 6: ...d pets to avoid accidents 3 Operator on the engine has been specially trained 4 Refuel in a well ventilated area with the engine stopped and in places refueling or storing gasoline no smoking and any flames or sparks 5 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 6 Locate the engine on a level wo...

Page 7: ...6 PARTS DESCRIPTION ...

Page 8: ...n which may shorten the engine s service life Check the engine with it stopped on a level ground Engine oil recommended SAE10W 30 As viscosity varies with regions and temperatures so the Lubricant has to be selected in accordance with our recommendation Pic 1 Pic 1 Inspect step 1 Remove the dipstick and clean it Pic 2 2 Reinsert the dipstick into the oil filler without Screwing in and check oil le...

Page 9: ... only for the model equipped with it 1 2 Reduction gearbox with an auto centrifugal clutch 1 Remove the dipstick and clean it Pic 3 Pic 4 2 Reinsert the dipstick without screwing it in and then take out it and check oil level 3 If the oil level is too low and recommended engine oil until it arrives the upper level mark Brand of the oil is the same as that of engine oil Oil capacity 0 50 liters Pic...

Page 10: ...ve under certain conditions 2 Refueling in a well ventilation area with the engine stopped Do mot smoke and allow flames or sparks In the area where gasoline is stored or where the fuel tank is refueled 3 Do not overfill the tank there should be no fuel in the filler neck After refueling make sure the fuel tank cap is set back securely 4 Be careful not to spill fuel when refueling Spilled fuel or ...

Page 11: ...free of dirt and water CAUTION Handle fuel with care because it can damage plastic and painted surfaces It is not in our guarantee range of damage by fuel spilling It is normal when you hear occasionally light spark knock or pinking with the engine running under heavy load Should spark knock or pinking be heard at a speed under normal load change brand of gasoline If such phenomenon still happens ...

Page 12: ...NG OF THE ENGINE 1 Push the fuel switch to ON Pic 6 2 Push the chock lever to OFF Pic 7 Pic 6 Pic 7 NOTE If the engine is hot closing the choke is unnecessary 3 Move left the throttle lever a little Pic 8 Pic 8 ...

Page 13: ...ing anti action and then make a rapid pull Pic 10 Pic 9 Pic 10 CAUTION Releasing the handle suddenly may make it hitting the engine Release the handle slowly conforming to its recoiling force 2 Electric starter Push the engine switch to START and remain there until the engine Start Pic 11 Pic 11 Engine switch Starter Engine switch ...

Page 14: ... Try once more 10 second later after last attempt failures Once the engine starts reset the engine switch to ON OPERATION 1 Preheat the engine and push back the 2 Set the throttle lever in proper position to ensure choke lever to ON Pic 12 the engine runs at required velocity Pic 13 Pic 12 Pic 13 ...

Page 15: ...s too low the engine oil alarm will stall the engine automatically to make it free of damage while the engine switch is still at ON CAUTION If the engine still fails to work check the engine oil level first before go to other check items Breaker Electric start Breaker is used to protect the battery charging circuit It will be disconnection when short circuit or battery polarity connects in wrong d...

Page 16: ... then adjust the idly screw If always using on highlands with a height above sea level of 1830 meters ask your dealer for doing the job The engine power will decrease by about 3 5 with every 305 meters up in height even the proper main jet is used The output would be much lower if not adjust the jet CAUTION The engine equipped with the main jet applicable to highlands may be damaged seriously in a...

Page 17: ...gine switch to OFF to stall the engine Stop it in normal in the following sequence 1 Push right the throttle valve lever to the bottom Pic 15 2 Push the engine switch to OFF Pic 16 Pic 15 Pic 16 3 Set the fuel switch to OFF Pic 17 Pic 17 ...

Page 18: ...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 more frequents maintenance will be necessary II REPLACEMENT OF PARTS We recommend that you should choose such parts which are manufactured by our Co ...

Page 19: ...ning or outside the set parameters Ⅳ PROBLEMS AFFECTING EXHAUST EMISSIOS 1 Difficult starting or difficult stopping 2 Unstable idling 3 Give off black smoke or consume too much fuel 4 Poor ignition sparks or sparks returned 5 Ignition is too advanced Once you find any of above problems contact your dealer for help ...

Page 20: ...onth or 50 Hrs Every 6 month or 100 Hrs Every 1 years or 300 Hrs Engine oil Check oil level Replace Reduction Gear oil Oil level check Replace Air cleaner Check Clean Replace clean Deposit cup Clean Spark plug Clean adjust Replace Spark eliminator Clean Idling Check adjust Valve clearance Check adjust Fuel tank Fuel filter Clean Fuel supply line Check Every two years do a replacement if necessary ...

Page 21: ...A still hot engine is helpful to drain out the engine oil in the crankcase rapidly and entirely Pic 18 1 Turn off the oil filler cap and drain plug to drain engine oil thoroughly Reinstall the drain plug and screw in securely 2 Fill the specified engine oil to the upper lever mark 3 Reinstall the oil filler cap Engine oil capacity of the crankcase is 0 6 liters Engine oil capacity of the 1 2 reduc...

Page 22: ... the air cleaner core in gasoline or low flash point detergents or explosion may happen CAUTION Never run the engine without an air cleaner or air with dirt and dust may enter the engine so speed the engine s wear 1 Turn off the air cleaner s cap and then separate the filter to check the air clearer filter weather worn out or broken If there is something wrong with it please replace it 2 Clean wit...

Page 23: ...h point cleansing solvents and then dry them up at last carry out reinstallation Set the fuel switch to ON and check for leaks Pic 19 Pic 19 WARNING Gasoline is extremely flammable and explosive in certain conditions Keep cigarette sparks and open flames away After reinstalling the deposit cup check it for leakage and make sure the area around the engine is dry enough 4 Spark Plug Spark plug type ...

Page 24: ...ed replace the spark plug instead 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 Pic 21 4 Check if the spark plug gasket is in good conditions or replace with a new one 5 Screw on the spark plug to the bottom first by hand and then tighten it up by a spark plug wrench Pic 22 If a new spark plug is used...

Page 25: ...iced at least once every 100 hour s operation so as to keep it in a sound condition WARNING Pic 23 The muffler is very hot during running the engine and even a long Time after stopping Never touch it or you may get burns Service After the engine cools down a Unscrew two nuts M4 and remove the exhaust elbow from the engine body b Turn off foure screws M5 from the muffler guard and take out the latt...

Page 26: ...eful not to damage the mesh of the spark eliminator Never use a damaged spark eliminator 6 Adjustment of Carburetor Idling Pic 24 a Start and preheat the engine until arriving at its normal working temperature b Obtain standard idling by adjusting the throttle fixing screw under the engine runs at a low speed Pic 25 Standard idling 1500 100rpm Pic 25 Pic 26 ...

Page 27: ...open flames and sparks away from operating site 1 Replace the engine oil Pic 26 2 Disconnect the spark plug Fill a spoon of fresh engine oil from the spark plug mount hole into the cylinder Rotate the engine to distribute engine oil evenly followed by fitting the spark plug to original position 3 Pull the starting rope slowly until feel a slight anti action and then keep pulling so as to align the...

Page 28: ...Improper or clogged main jet Readjust or clean blow to get through Needle valve is closed improperly or start hole is clogged Dismantle needle valve and repair clean blow to get through Floater is damaged or sticking Repair floater 1 Something wrong with the fuel system Normal cylinder compression Normal spared Fuel flows easily and smoothly Fuel is filthy or deteriorated Replace There is filthy o...

Page 29: ...ressure coil spark Normal cylinder compression Normal fuel supply Normal spark plug High pressure coil is damaged Replace Ignition coil damaged Replace 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 for away from the ...

Page 30: ...rbon fouling Piston ring is broken Replace Spark plug is not installed tighten or without a gasket Tighten with a gasket in Air leakage between cylinder block and cylinder Check cylinder gasket and the flatness of the surface by which cylinder black on tacting with cylinder head tighten cylinder bolts in the order to stipulated torque Air leakage in valve Check valve clearance and tightness repair...

Page 31: ...djust ignition advance angle Fuel supply system Air in fuel line of fuel line clogged Exhaust air or dredge fuel line Main jet is not adjusted Properly Readjust In carburetor needle valve hole and main jet clogged Clean and blow to get through Fuel cock is clogged up Clean replace Damage part Too much carbon fouling in combusting chamber Clear away Air cleaner is clogged up Clean filter element ...

Page 32: ... it Poor compression Piston or cylinder or piston ring is worn Replace it with a new one Air leakage from the surface by which cylinder block contacting with cylinder head Replace cylinder gasket Too big or too small valve clearance Adjust it Valve tightness is poor Repair ...

Page 33: ...or crankshaft main shaft is worn Replace roller bearing TROUBLE CAUSE REMEDY Abnormal combustion Engine is too hot Shoot trouble Too much carbon fouling 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 floater room Clean Improper spark plug electrodes Clearance Adjust Inco...

Page 34: ...te it TROUBLE CAUSE REMEDY When running 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 and remove the dropped object Hi voltage wire is dripped out Connect it Engine oil in the crankcase is insufficient Add engine oil until it arrives the upper level Do Do Ignition coil is struck th...

Page 35: ...34 Parking wire is located on the engine body Find out meeting and insulate The other Cylinder is pulled considerably valve falls off Repair or replace damaged parts ...

Page 36: ...der piston or piston ring is worn Resulting in air flow between cylinder and crankcase Replace tie rod Tie rod deformation makes piston and Cylinder bushing side wear Replace tie worn part Improper adjustment of engine speed produces excessive rotational speed Readjust engine speed to proper value by speed regulator Bearing of crankshaft is burn out Replace main bearing NOTE The gasoline engine sh...

Page 37: ...s broken Replace There is metal beaten noise in abnormal combustion Too much carbon deposit in combusting chamber Clear away carbon deposit Too small electrodes clearance of spark plug Adjust electrodes clearance properly Engine is flooded with fuel Check relative parts such as carburetor Improper fuel brand Replace fuel Engine is excessively hot Shoot trouble TROUBLE CAUSE REMEDY The other Improp...

Page 38: ...der tilt 25 Displacement cm3 212 Bore stroke mm 70 55 Max Power in theory kW r min 5 5 7 5PS 3600 Power recommended KW r min 4 5 6 0PS 3600 Max Torque N m r min 11 5 3000 Fuel consumes g kWh 395g kwh Cooling system Force air cooled Ignition system Non transistorized ignition TDI Spark plug type F6TC BPR6ES NGK Out direction of power shaft Counterclockwise ...

Page 39: ...e therefore they are subject to change without notice Data in are suitable for engine which is equipped with reducer Ⅱ TIMING OF DISTRIBUTION Intake valve opening BTDC10 Intake valve closing ABDC20 Exhaust valve opening BBDC30 Exhaust valve closing ATDC10 Ⅲ TIGHTENING TORQUE OF IMPORTANT BOLTS S N Item Torque Value N m 1 Cylinder head bolt 34 2 Flywheel bolt 118 3 Crankcase cover bolt 24 4 Connect...

Page 40: ...39 Electric Diagram electric start Except Electric Start Model Different Model have different electric diagram ...

Page 41: ...40 ...

Page 42: ...41 K 1583 ...

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