Troubleshooting - Mantis Tiller Owner's Manual

Troubleshooting

Problem
1. Tines don't turn when throttle
is depressed
2. Engine fails to start
3. Engine hard to start
4. Engine misses
5. Engine lacks power
6. Engine overheats
7. Engine noisy or knocking
8. Engine stalls under load
18
Cause
– Engine is not seated properly on the gear housing.
o/ o
– " I " switch is in " " position.
– No fuel in tank.
– Fuel filter clogged.
– Fuel line clogged.
– Spark plug shorted or fouled.
– Spark plug is broken
(cracked porcelain or electrodes broken)
– Ignition lead wire shorted,
broken or disconnected from spark plug.
– Ignition inoperative
– Diaphragm clogged
– Water in petrol or stale fuel mixture.
– Too much oil in fuel mixture.
– Engine under or over choked.
– carburettor out of adjustment.
– Gasket leaks (carburettor or cylinder base gasket).
– Weak spark at spark plug.
– Dirt in fuel line or carburettor.
– carburettor improperly adjusted.
– Spark plug fouled, broken or incorrect gap setting.
– Weak or intermittent spark at spark plug.
– Air filter clogged.
– carburettor out of adjustment.
– Muffler clogged.
– Clogged exhaust ports.
– Spark Arrestor Clogged.
– Poor compression.
– Insufficient oil in fuel mixture
– Air flow obstructed
– Spark plug in incorrect heat range.
– Bearings, piston ring or cylinder walls are worn.
– carburettor adjustment too "lean".
– Engine overheats.
Remedy
– Re-install engine following the instructions
– Move switch to " I ".
– Fill Tank.
– Replace filter.
– Clean fuel line.
– Install new spark plug.
– Replace spark plug.
– Replace lead wire or attach to spark plug.
– Contact your Mantis Service Department.
– Replace diaphragm
– Drain entire system and refill with fresh fuel mixture.
– Drain and refill with correct mixture.
– If flooded 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.
– See "carburettor Adjustment"
– Replace gaskets.
– Contact your Mantis Service Department.
– Remove and clean.
– See "carburettor Adjustment".
– Clean or replace spark plug – set gap to
(.024-.028 in.) 0.6-0.7 mm
– Contact your Mantis Service Dept.
– Clean or replace air filter.
– See "carburettor Adjustment".
– Clean carbon from muffler.
– Remove muffler, rotate engine until the piston
is at top of cylinder. With a wooden scraper or
blunt tool, remove all carbon from exhaust
ports. Be careful not to scratch or damage
piston or cylinder walls. Blow out all loose
carbon with compressed air. Install muffler and
gasket.
– Clean Spark Arrestor
– Contact your Mantis Service Department.
– Mix fuel as described in starting instructions.
– Clean flywheel cylinder fins and screen.
– Replace with plugs specified for engine.
– Contact your Mantis Service Department.
– See "carburettor Adjustment".
– Remove dust and dirt from between fins