Troubleshooting - Mantis 7945 Operator's & Parts Manual

Troubleshooting

Problem
1. Tines don't turn when throttle
is depressed
2. Engine fails to start
3. Engine hard to start.
4. There is black smoke coming from exhaust • The muffler screen is clogged
5. Engine misses.
6. Engine lacks power.
7. Engine overheats.
8. Engine noisy or knocking.
9. Engine stalls under load.
Cause
• Engine is not seated properly on the gear housing.
• O/I switch is in "O" position.
• No fuel in tank.
• Fuel strainer 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
• Water in gasoline.
• Gasket leaks (carburetor or cylinder base gasket).
• Weak spark at spark plug.
• Dirt in fuel line or carburetor.
• Carburetor improperly adjusted.
• Spark plug fouled, broken or incorrect
gap setting.
• Weak or intermittent spark at spark plug.
• Air filter clogged.
• Muffler clogged.
• Spark Arrestor Clogged.
• Poor compression.
• Air flow obstructed
• Spark plug in incorrect heat range.
• Bearings, piston ring or cylinder walls are worn.
• Engine overheats.
Contact us at www.mantis.com
Remedy
• Re-install engine following the instructions on
page 18 "How to reseat the flange".
• Move switch to "I"
• Fill Tank.
• Replace Strainer.
• Clean fuel line.
• Install new spark plug.
• Replace spark plug.
• Replace lead wire or attach to spark plug.
• Contact Mantis customer service.
• Drain entire system and refill with fresh fuel.
• Contact Mantis customer service.
• Clean carbon from muffler screen following
instructions on page 18.
• Remove and clean.
• Contact Mantis customer service.
• Clean or replace spark plug - set gap to .024-.028
in. (0.6-0.7 mm)
• Contact Mantis customer service.
• Clean or replace air filter page 17.
• Clean carbon from muffler, page 18.
• Clean Spark Arrestor, page 12.
• Contact Mantis customer service.
• Clean flywheel cylinder fins and screen.
• Replace with plugs specified for engine.
• Contact Mantis customer service.
• Remove dust and dirt from between fins.
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