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IO.
TROUBLESHOOTING
The following three conditions must be fulfilled for satisfactory engine start.
(1)
The cylinder filled with
a
proper fuel-air mixture.
(2)
Good compression in the cylinder.
(3)
Good
spark, properly timed, to ignite the mixture.
The engine cannot
be
started unless these three conditions
are
met.
There are
also
other factors which make engine start difficult,
e.g.,
a
heavy load
on
the engine when it
is about to start at low speed, and
a
high back pressure due to a
long
exhaust pipe.
The most common
causes
of
engine troubles are given below:
10-1
NO
ENGINE
OPERATION
Phenomenon
Remedy
Possible
causes
1)
Poor connection
of
key switch wiring
motor
Replace
2)
Wiring discontinuity between key switch and starter
Check, repair or replace
I
I
I
I
3)
Wiring discontinuity between battery and starter
motor
I
Replace
I
I
I
I
I
1.
Electric starter
does not
operate.
Check, clean or replace
5)
Poor
connection
of
battery terminal
4)
Improper battery
(low
capacity) or discharged
battery
Charge
or
replace battery
6)
Starter magnetic switch faulty
Check, clean, repair
or
replace
I
I
I
I
I
7)
Starter motor faulty
1
Repair or replace
I
I
I
1
I
I
8)
Crankshaft seizure
I
Check, repair or replace
I
I
I
I
I
I
9)
Seizure between piston
and
cylinder
I
Check, repair or replace
I
Electric starter
operates, but
engine does
2)
Poor
connection or discontinuty of ignition system
wirings
Check,
repair
or
rep,ace
not start.
Repair or replace
3)
Electric starter faulty
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