Onan MJA Series Service Manual page 56

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TROUBLE-SHOOTING CHART 4, • IGNITION SYSTEM
TROUBLE
POSSIBLE CAUSE
REMEDY
No spark
No voltage to ignition
Check control system
system.
Sect 6.
Defective breaker points.
I
Inspect points for dirt,
burning, pitting. Check
clearance.
Defective high tension
I
Replace.
leads.
Defective spark plugs. Replace.
High resistance in Replace.
primary leads.
Defective. ignition coil. Replace.
Weak, Yellow
Dirty, burned or pitted Clean or replace the
Spark - usually breaker pOints. points.
causinghatd
starting
Defective ignition con­ Test and replace if
denser. defective
High resistance in Clean aU connections
primary circuit.
and inspect the wiring.
Defective spark plugs.
Replace.
Weak ignition coil. Replace.
Excessively
I
High voltage.
Be sure correct voltage
Burned or Pitted
batteries are used.
Ignition Points
Dirty or oily points. Keep points clean ata11
times - don't over oil
cam and pivot.
Breaker gap too small
<
Adjust.
Defective ignition con­ Check the condenser on
denser.
a commercial tester.
Using the wrong i'gnition Use only the condenser
condenser. specified.
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