3.44
ENGINE
• Incorrect float level setting
• Carburetor inlet needle and seat worn
• CVT system calibrated incorrectly or components
worn or mis-adjusted
• Fuel quality poor (old)
• Restricted exhaust
• Restricted crankcase breather system
• Weak ignition (loose coil ground, faulty coil, stator,
engine to chassis ground, or ETC switch)
• Improperly assembled air intake system
ENGINE Troubleshooting
Engine Turns Over But Fails to Start
• No fuel
• Dirt in fuel line or filter
• Fuel will not pass through fuel valve
• Fuel pump inoperative/restricted
• Fuel tank vent plugged
• Carburetor starter circuit restricted
• Engine flooded
• Low compression (high cylinder leakage)
• No spark (Spark plug fouled)
Engine Does Not Turn Over
• Dead battery
• Starter motor does not turn
• Engine seized, rusted, or mechanical failure
Engine Runs But Will Not Idle
• Idle speed set too low
• Faulty ETC system
• Restricted carburetor pilot system
• Carburetor misadjusted
• Choke not adjusted properly or sticking plunger
• Low compression
• Crankcase breather restricted
• Air filter restriction
Engine Idles But Will Not Rev Up
• Spark plug fouled/weak spark
• Broken throttle cable
• Obstruction in air intake
• Air box removed (reinstall all intake components)
• Incorrect or restricted carburetor jetting
• ETC switch limiting speed
• Reverse speed limiter limiting speed
• Carburetor vacuum slide sticking/diaphragm
damaged
• Incorrect ignition timing
• Restricted exhaust system
• Camshaft lobes worn
• Flywheel key sheared
Engine Has Low Power
• Spark plug fouled
• Cylinder, piston, ring, or valve wear or damage
(check compression)
• CVT not operating properly
• Restricted exhaust muffler
• Dirty carburetor
• Cam lobe worn
Piston Failure - Scoring
• Lack of lubrication
• Dirt entering engine through cracks in air filter or
ducts
• Engine oil dirty or contaminated
Excessive Smoke and Carbon Buildup
• Oil level too high
• Excessive piston-to-cylinder clearance
• Worn rings, piston, or cylinder
• Worn valves, guides or seals
• Restricted crankcase vent
• Air filter dirty or contaminated
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