2001 Polaris SLH, Virage PWC Factory Service Manual, Page 34Get this manual
Maintenance Engine Engine Mounts
Check tightness of all engine mounts including bolts that secure mounting plate to engineInspect rubber mounts for cracksTighten or replace if necessaryAlways replace engine mounts when engine is removed for service
Compression Test
A compression test is good indicator of engine condition For accurate readings, use high quality gauge and make sure the battery is in good condition and fully charged
Compression Gauge PN 2870852
WARNING
The spark plug high tension leads must be securely grounded to the engine block to prevent spark which may ignite fuel or fumes, causing fire or explosion Some models are manufactured with grounding posts mounted to the pop-off valvethermostat housing Attach spark plug wires to grounding posts whenever possible123Remove all spark plug high tension leads and connect securely to ground on engine blockRemove all spark plugs and install compression gauge in cylinder to be tested Using the starter motor, turn engine over with throttle wide open until maximum reading is obtained (approximately 3-5 seconds)Record reading Repeat for the other cylinders and compare to each other cylinderAll readings must be within of each otherCompression (Open Throttle at Sea Level) Standard -120-150 Ibssqin 8.40-10.5 kgsqcm Service LimitGreater than variance between cylinders