Compression Test
2002 Polaris Freedom / Virage PWC
A compression test is a good indicator of engine condition. For accurate readings, use a 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 a spark which may ignite fuel or fumes, causing a fire or explosion. Some models are manufactured with grounding posts mounted to the pop-off valve / thermostat housing. Attach spark plug wires to grounding posts whenever possible.
- Remove all spark plug high tension leads and connect securely to ground on engine block.
- Remove all spark plugs and install compression gauge in cylinder to be tested.
- Using the starter motor, turn engine over with throttle wide open until a maximum reading is obtained (approximately 3-5 seconds). Record reading.
- Repeat for the other cylinders and compare to each other cylinder. All readings must be within 5% of each other.
Compression (Open Throttle at Seal Level)
Standard -120-150 lbs./sq. in 8.40-10.5 kg/sq. cm
Service Limit - Greater than 5% variance between cylinders.
Standard -120-150 lbs./sq. in 8.40-10.5 kg/sq. cm
Service Limit - Greater than 5% variance between cylinders.
Updated on: Sunday, December 27, 2020