1999 Polaris SLH, SLTH, SLX, SLTX, PRO785 Factory Service Manual, Page 64Get this manual

1999 Polaris SLH, SLTH, SLX, SLTX, PRO785 Factory Service Manual, Page 64

MAINTENANCErrUNE UP Troubleshooting Rich Fuel Mixture Symptoms: Fouled spark plugs; black sooty exhaust; rough idle, idle
fuel mixture Poor quality, low octane gasoline Incorrect ignition timing Spark plug heat range too high Weak spark Incorrect
fuel or fuel mixture Water in fuel system or oil tank Fuel filter restricted Jet intake clogged Cooling system clogged Symptoms:
Engine power loss III ::::I III III III ::::I III Symptoms: Engine noise Detonation (see causes for holed or eroded pistons,
this section) Excessive piston clearance Exhaust leak, loose exhaust pipe or muffler (water box) Engine mounts or mount plate
loose or rubber mounts broken Drive coupler splines dry Driveshaft runout excessive Driveshaft end play incorrect; rubber
dampers worn or miss ing Broken ring or ring land Oil pump bushing end play excessive Ignition timing incorrect Piston pin