User Manual

TROUBLESHOOTING 13
Troubleshooting
Generally speaking, there are very few things that will keep today’s modern
gas engines from starting. To that end, make sure you’re using good quality
“fresh” fuel, you have a fully charged ignition battery, and good spark plugs
installed. Should the engine fail to start after these items are verified, refer to
the troubleshooting chart below.
SYMPTOM CAUSE CORRECTIVE ACTION
Engine fails to Low voltage on Replace/recharge the
start ignition battery ignition battery
Bad spark plug(s) Inspect/replace bad spark plug
Insufficient priming Repeat priming procedure
“Flooded” due to Disconnect ignition battery,
excessive priming remove the spark plugs, and
rotate the propeller several
times to “clear” the cylinder
Engine fires but Over-primed Disconnect ignition battery and
does not run rotate propeller several times to
“clear” cylinder
Engine starts but Mixture too rich Close high-speed needle valve
slows down and
1
/4 turn and start again. Repeat
then stops until engine is running smoothly
Engine starts, Mixture too lean Open high-speed needle valve
speeds up, and
1
/4 turn and start again. Repeat
then quits until engine is running smoothly
Rough idle Plug Change plug type
In the event that none of the above procedures results in the engine running
properly, contact our service department for suggestions:
Horizon Service Center
4105 Fieldstone Road
Champaign, Illinois 61822
877-504-0233 (Mon–Fri 8:00–5:00 CST)