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10-2
STARTING
DIFFICULTIES
Phenomenon
1.
Low
engine
speed at
starting
2.
Ignition
system
malfunction
3.
Fuel system
malfunction
4.
Engine core
components
malfunction
Possible
causes
Remedy
1)
Battery discharged
Clean or repair
3)
Poor connection between battery and ground
Clean or repair
2)
Poor connection between battery and starter motor
Charge battery
4)
Electric starter faulty
I
Repair or repiace
5)
Improper engine oil
Replace
with
recommended
engine oil
-
Spark plug
*
Improper spark plug gap
Replace
No
insulation
Adjust gap
0.7
mm
to
0.8
mm
Carbon deposits
Ignition
coil
No
insulation or discontinuity
Poor connection or discontinuity of ignition code
Improper air gap between ignition coil and flywheel
1)
No
fuel in fuel tank
2)
Fuel pump clogged
3)
Fuel hose clogged or pinched
4)
Air
mixing into fuel lines
Clean
Replace
Repair or replace
Adjust
Refill
Clean
Clean or replace
Check and adjust connecting
portion
5)
Improper gasoline or water infiltration
Replace
6)
Carburetor
*
Overflow
Adjust
*
Clogged or damaged
Check and adjust
*
Improper operation of throttle valve
Disassembly and clean
7)
Poor connection
of
fuel cut valve wiring
Check and repair
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
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