2005 Kawasaki KAF400 Mule 600 and Mule 610 4x4 Service Manual, Page 383Get this manual
17-2 APPENDIX Troubleshooting Guide
Piston ring bad (worn, weak, broken, or sticking) Piston ringgroove clearance excessive Cylinder head gasket damaged Cylinder head warped Valve spring broken or weak Valve not seating properly (valve bent, worn, or carbon accumulation on the seating surface) Poor Running at Low Speed: Spark weak: Spark plug dirty, broken, or maladjusted Spark plug cap or high tension wiring trouble Spark plug cap shorted or not in good contact Spark plug incorrect Ignition coil trouble Fuelair mixture incorrect: Air cleaner clogged, poorly sealed, or missing Choke valve stuck closed Fuel level too high or too low Fuel tank air vent obstructed Fuel pump trouble Governor link mechanism malfunctioning Compression low: Spark plug loose Cylinder head not sufficiently tightened down No valve clearance Cylinder, piston worn Piston ring bad (worn, weak, broken, or sticking) Piston ringgroove clearance excessive Cylinder head warped Cylinder head gasket damaged Valve spring broken or weak Valve not seating properly (valve bent, worn, or carbon accumulation on the seating surface) Other: Engine oil viscosity too high Front final gear case oil viscosity to high (KAF400-AC) Drive train trouble Brake dragging Poor Running or No Power at High Speed: Firing incorrect: Spark plug dirty, broken, or maladjusted Spark plug cap shorted or not in good contact Spark plug incorrect Ignition coil trouble Fuelair mixture incorrect: Choke valve stuck close Main jet clogged or wrong size