13
TROUBLE SHOOTING GUIDE
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
Engine won’t start
No spark
Ensure the spark plug is clean.
Replace the spark plug if upon
inspection the electrodes are burned
or worn. Check the spark plug gap
(Fig.23) with a feeler gage. Check for
spark by using a Spark Tester.
No fuel
Pump primer bulb, if no fuel flows
then pipes blocked. Have serviced. If
primer bulb fills then engine may be
flooded
Flooded engine
Remove spark plug, turn engine
upside down, set choke to run, pull
starter cord 10 times, clean spark
plug and refit.
Check fuel/oil mix
Drain and use fresh and correct fuel
mix
Engine will not rev
Blocked air-filter
Remove air-filter, clean & refit
Blocked exhaust spark
arrestor
Remove spark arrestor, clean & refit
Carburettor needs
tuning
Have serviced
Engine Smokes and
will not rev
Incorrect fuel mixture
too much oil
Drain and use fresh and correct fuel
mix (Oil/Fuel mix ratio 1:25)
Dirty air filter or fuel
filter
Incorrect oil used
Clean as per instructions
Use Lawn Star High performance 2-
stroke engine oil (90-20000)
Oil leaks out of
exhaust muffler
Cutting blades
jammed
Incorrect fuel mixture
too much oil
Cutting blades dirty
Cutting blades
damaged
Drain and use fresh and correct fuel
mix (Oil/Fuel mix ratio 1:25)
Clean and oil
Have serviced
