RG25DH Operation • Service • Maintenance • Parts Manual
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41
Troubleshooting
Four Cycle Troubleshooting - continued
IGNITION SYSTEM
Engine Will
Not Start
Check for Spark
Spark No Spark
Check flywheel for
correct key, damaged
or sheared key
Replace spark plug
Set proper air gap on
external coil
Isolate engine from all
equipment (disconnect
wiring harness), repeat
test
Set proper point gap,
check condensor and
timing
Spark No Spark
Equipment problem,
check switches, wiring and
equipment controls
Engine problem, check
for shorts or grounds
in wiring
Test coil for
intermittent or weak
spark
Parasitic load too high Test ignition module
To reduce the risk of serious injury or death from fires and/or explosions, NEVER use flammable
solvents (e.g., gasoline) to clean serviceable parts. Use a water-based, non-flammable solvent
Degreaser Cleaner.
NEVER use compressed air to clean debris from yourself or your clothing. When using compressed
air to clean or dry serviceable parts:
• Wear appropriate eye protection.
• Use only approved air blow nozzles.
• Air pressure must not exceed 30psi (206kPa).
• Shield yourself and bystanders from flying debris.
CAUTION
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