JC-SUPERJET
Active Member
Need to perform the Leak Tests as shown on pages 28-32 on the 1997 Seadoo Shop Manual which includes the 717 Engine. Section 03-02-1 Testing Procedure.
Did you perform any of these tests?
Leak Test:
1) Engine Cooling System
2) Bottom End and Top End
3) Rotary Valve Shaft
Do this on EVERY newly Assembled Engine.
Does your Compression Gauge have a built-in Check Valve at the Spark Plug Adapter End? If there is no Check Valve there, then the Volume of the Hose is added and will "increase" the Dome cc's resulting in a False Low Compression Reading at the Gauge.
Compression Test Hose Volume can reduce Compression Readings by 20 psi, if no Schrader Valve.
Either use a good Snap-On Compression Tester or eliminate/shorten the Hose Length between the Compression Gauge and the Spark Plug Hole.
If the Compression Readings go up, then you found the culprit.
Did you perform any of these tests?
Leak Test:
1) Engine Cooling System
2) Bottom End and Top End
3) Rotary Valve Shaft
Do this on EVERY newly Assembled Engine.
Does your Compression Gauge have a built-in Check Valve at the Spark Plug Adapter End? If there is no Check Valve there, then the Volume of the Hose is added and will "increase" the Dome cc's resulting in a False Low Compression Reading at the Gauge.
Compression Test Hose Volume can reduce Compression Readings by 20 psi, if no Schrader Valve.
Either use a good Snap-On Compression Tester or eliminate/shorten the Hose Length between the Compression Gauge and the Spark Plug Hole.
If the Compression Readings go up, then you found the culprit.
