2003-2004 GP1300R WaveRunner Service Manual, Page 94Get this manual
COMPRESSION PRESSURE MEASUREMENT COMPRESSION PRESSURE MEASUREMENT
SERVICE POINTS
The following procedure applies to all of the cylindersNOTE: Insufficient compression pressure will result in loss of performance1Start the engine and warm it up until the engine temperature is 48 (118 F)2Remove: Seat 3Disconnect: Spark plug caps 4Remove: Spark plugs