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CHAPTER FIVE:
ENGINE MAIN TROUBLES AND REMEDIES
TROUBLES
CAUSE
REMEDY
REMARKS
a. Starter
does not
work
·Battery pole connecting loosen or
electric insufficient
·Electric circuit breakaway
·Starter damaged
Tighten or charge
Repair
Check or Repair
b. Spark
plug does
not firing
or Firing
Weakness
·Ignition coil damaged
·Spark plug burned out or isolator
damaged
·Spark plug carbon deposit or wrong
gap
·High voltage cable damaged or wrong
gap
·Low voltage circuit damaged or poor
connecting
·Capacitor damaged
·Distributor cover or firing head
damaged
·Wrong ignition
Replace
Replace
Clean Carbon deposit or adjust gap
Replace cable or tighten connecter
Replace or tighten
Replace
Replace
Adjust
c. Fuel
supply
system
problems
·Fuel pump does not work
·Fuel pipeline blocked or damaged
·Carburetor blocked , fuel pressure in the
float chamber is too low or wrong
adjustment
·Mixture too rich or too poor
Repair or replace
Repair or replace
Clean or readjust
Adjust chock valve and fuel valve
1. Engine
starting
difficulty
d. Cylinder
Compressi
on pressure
insufficient
·Cylinder gasket damaged
·Wrong valve clearance
·Leakage through valve and valve seat
·leakage through intake manifold
·Piston ring or cylinder over worn
Replace
Readjust
Repair
Repair
Replace
2. Lack of power
·Cylinder compression pressure
insufficient
·Fuel supply insufficient
·Spark plug firing weakness
·Wrong adjustment of fuel valve and
carburetor
·Exhaust blocked
Done as item 1-d
Done as item 1-c
Done as item 1-b
Readjust
Check exhaust system and clear
carbon deposit
3.Over heat
·Fn belt loosen or water pump
damaged
·Insufficient of cooling Liquid or
Adjust belt or replace water pump
Replenish cooling Liquid or
