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Troubleshooting
Problem Cause Remedy
1. Tines don’t turn when throttle – Engine is not seated properly on the gear housing. – Re-install engine following the instructions
is depressed
2. Engine fails to start – “
o/i” switch is in “o” position. – Move switch to “i”.
– No fuel in tank. – Fill Tank.
– Fuel lter clogged. – Replace lter.
– Fuel line clogged. – Clean fuel line.
– Spark plug shorted or fouled. – Install new spark plug.
– Spark plug is broken – Replace spark plug.
(cracked porcelain or electrodes broken)
– Ignition lead wire shorted, – Replace lead wire or attach to spark plug.
broken or disconnected from spark plug.
– Ignition inoperative – Contact your Mantis Service Department.
– Diaphragm clogged – Replace diaphragm
3. Engine hard to start – Water in petrol. – Drain entire system and rell with fresh fuel.
– Engine under or over choked. – If ooded by over choking, proceed according to
instructions in operation section. If under choked,
move choke lever to closed position and crank two
or three times.
– Gasket leaks (carburettor or cylinder base gasket). – Replace gaskets.
– Weak spark at spark plug. – Contact your Mantis Service Department.
4. Engine misses – Dirt in fuel line or carburettor. – Remove and clean.
– Spark plug fouled, broken or incorrect gap setting. – Clean or replace spark plug – set gap to
(.024-.028 in.) 0.6-0.7 mm
– Weak or intermittent spark at spark plug. – Contact your Mantis Service Dept.
5. Engine lacks power – Air lter clogged. – Clean or replace air lter.
– Mufer clogged. – Clean carbon from mufer.
– Spark Arrestor Clogged. – Clean Spark Arrestor
– Poor compression. – Contact your Mantis Service Department.
6. Engine overheats – Air ow obstructed – Clean ywheel cylinder ns and screen.
7. Engine noisy or knocking – Spark plug in incorrect heat range. – Replace with plugs specied for engine.
– Bearings, piston ring or cylinder walls are worn. – Contact your Mantis Service Department.
8. Engine stalls under load – Engine overheats. – Remove dust and dirt from between ns
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