14
Engine Troubleshooting
Symptom
Diagnosis
Fix
Engine
does not
fire
Ignition battery
voltage low
Charge or
replace battery
Engine
starts,
then rpm
increases
until engine
cuts out
Fuel not reaching
engine
Check for:
a) fuel in tank
b) fuel tubing
cut, blocked,
or kinked
c) carburetor
clogged
Battery wires faulty
or loose
Replace wires or
Re-connect/check
connections
Faulty spark plug
or not firing
Replace spark plug
or check for spark *
Engine flooded
Remove plug,
disconnect fuel
line, rotate prop
to remove fuel
* This can be done by removing the spark plug from the cylinder of
the engine, inserting the plug into the plug cap and contacting the
plug to the outside of the crankcase or cylinder. Have an assistant
turn the engine over while checking this and be sure to have the
spark plug fi rmly plugged into the ignition wire.
Warning:
The high
voltage from the ignition can cause bodily harm, especially when
checking for spark in this manner.
