Onan MJA Series Service Manual page 13

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11 TROUB LE -SHOOTING CHAR T
TROUBLE-SHOOTING CHART 1, THE ENGINE
TROUBLE
Engine will not
crank
I
Engine cranks
too slowly
Engine cranks but
won't start
Water in fuel. Replace fuel.
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­
REMEDY
POSSIBLE CAUSE
Battery discharged. See Trouble-Shooting
Chart 7.
Control circuit defective .
See Sect 6.
Internal seizure. Disassemble engine
and repair.
Engine oil too heavy for See Sect 3.5.1 for oil
operation in low temper- recommendations.
ature .
Defective connections be- See Sect 3.6.2.
tween battery and starter.
!
REVOLVING ARMATURE
GENERA TOR (Exciter
Cranked)
Poor brush contact on See Sect 5.
generator.
SEPARATE STARTING
MOTOR MODELS
Starting motor de- See Trouble -Shooting
fective. Chart 7.
Oil in crankcase too
See Sect 3.5.1 for oil
heavy for low temper- recommendations.
ature.
Discharged battery.
See Trouble-Shooting
Chart 7.
Corroded battery con-
See Sect 3.6.2.
nectj Jns or defective
battery cable.
Fuel system faulty.
No fuel in tank. Refill tank.
Clean filter Sect 3.2.2 Filter screen clogged.