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Phenomenon
Possible causes
Remedy
1. Low engine
speed at
starting
1) Battery discharged
Charge battery
2) Poor connection between battery and starter motor
Clean or repair
3) Poor connection between battery and ground
Clean or repair
4) Electric starter faulty
Repair or replace
5) Improper engine oil
Replace with recommended
engine oil
2. Ignition
system
malfunction
Spark plug
* Improper spark plug gap
* No insulation
* Carbon deposits
Adjust
Replace
Clean
Ignition coil
* No insulation or discontinuity
* Poor connection or discontinuity of ignition code
Replace
Repair or replace
Improper air gap between ignition coil and flywheel
Adjust
3. Fuel system
malfunction
1) No fuel in fuel tank
Refill
2) Fuel pump clogged
Clean
3) Fuel hose clogged or pinched
Clean or replace
4) Air mixing into fuel lines
Check and adjust connecting portion
5) Improper gasoline or water infiltration
Replace
6) Carburetor
* Overflow
* Clogged or damaged
* Improper operation of throttle valve
Adjust
Disassembly and clean
Check and adjust
7) Poor connection of fuel cut valve wiring
Check and repair
4. Engine core
components
malfunction
1) Insufficient tightening of cylinder head bolts
Check and retighten
2) Wear of piston, piston ring and/or cylinder
Repair or replace
3) Improper contact of valve and seat
Repair
4) Valve seizure
Repair
5) Improper valve clearance
Adjust
6) Intake manifold gasket leakage
Retighten intake manifold bolts or
replace gasket
7) Carburetor gasket leakage
Retighten carburetor bolts or replace
gasket
8) Insufficient tightening of spark plug
Retighten
9-2 STARTING DIFFICULTIES
Содержание EH63
Страница 1: ...SERVICE MANUAL EH63 64 65 and EH72 ENGINES Models PUB ES2158 Rev 08 09 ...
Страница 84: ......
Страница 85: ...PRINTED IN THE USA ...