2003 Polaris Scrambler 50-90 Sportsman 90 Predator 90 Service Manual, Page 54Get this manual

2003 Polaris Scrambler 50-90 Sportsman 90 Predator 90 Service Manual, Page 54

ENGINE Spark plug fouled Cylinder, piston, ring, or reed wear or damage (check compression) CVT not operating properly Restricted exhaust muffler Carburetor slide sticking or damaged Dirty carburetor

Excessive Smoke and Carbon Buildup
Excessive piston-to-cylinder clearance Worn rings, piston, or cylinder Restricted breather Air filter dirty or contaminated Oil pump misadjusted or faulty

Piston FailureScoring
Lack of lubrication Dirt entering engine through cracks in air filter or ducts Engine oil dirty or contaminated

Low Compression
Cylinder head gasket leak Cylinder or piston worn Piston rings worn, leaking, broken, or sticking Reeds broken or bent

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