Polaris Virage TX 2000 Service Manual page 59

MAINTENANCE/TUNE UP
Troubleshooting
Piston Damage
Symptoms: Hole in piston.
• Water in carburetors or fuel
• Lean fuel mixture (see lean condition troubleshooting)
• Detonation from incorrect ignition timing, poor quality fuel, modified cylinder heads, excessive
carbon buildup, etc.
• Incorrect spark plug
• Overheated engine
• Flywheel key sheared, key way damaged, flywheel damage
• Crankshaft out of index
Symptoms: Eroded piston (exhaust edge of crown) or scuffed piston.
• Lean fuel mixture (see lean condition troubleshooting)
• Detonation from incorrect ignition timing, poor quality fuel, modified cylinder heads, excessive
carbon buildup, etc.
• Engine overheating (inspect cooling system)
• Crankshaft out of index (see engine section)
• Flywheel key sheared
Symptoms: Seized or scuffed piston.
• Water in oil
• Oil pump failure
• Oil tank vent problem restricted, check valve in backward
• Pinched or restricted lines
• Lean fuel mixture (see carburetion)
• Poor quality fuel
• Water in fuel
• Engine overheating
Symptoms: Cracked piston crown.
• Hydrolocked engine (water or fuel)
• Foreign material in engine
Symptoms: Cracked/broken piston skirt.
• Excessive piston to cylinder clearance
• Foreign material in engine
• Sharp ports
• Modified engine
• Hydrolocked engine (water or fuel)
3/00 2.42 Polaris Sales Inc.