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   Saturday, February 28, 2015  

 Author:   Topic: 97 GTX Trouble Starting
 David_HX posted: 12/1/2010 8:47:01 AM   

A quick check of which will verify/eliminate the Oil Injection Check Valves would be to first evacuate all the Oil from the Cylinders by turning over the engine w/o Plugs installed until only a slight Oil vapor comes out of the Spark Plug holes. Then clamp off the Smaller of the Two Oil Injection Oil supply lines after the Oil Filter and as close to the Oil Pump as possible on the Front of the Engine.
Oil Line Item #20---


Let is sit for a week--and try checking for Oil shooting out of the Spark Plug holes again while turning engine over. If Oil comes out again from *one* Cylinder with the Oil Pump supply line clamped off then the Oil is most likely coming from the Inner Crank Seal as previously mentioned. If no Oil is found then remove the Clamp and wait a few more days--try again and if Oil returns to either Cylinder, replace the Oil Injection Check Valve associated w/ that Cylinder.
You wont find them on the parts diagram, but they are available internally. I would change them in pairs since whatever caused one to go bad may have a similar effect on the other and I would also change the Oil Filter canister since contamination that got through to the Check Valve(s) could cause the tiny internal check ball to fail/open/leak.

Check Valve p/n is: 420956510 ($22.oo/ea.)


 David_HX posted: 12/1/2010 8:29:07 AM   

Your front Inner Crankshaft Seal may be leaking allowing Oil into the front Cylinder from the Rotary Valve Oil Bath area which is located between the two Cylinders inside the Engine Cases. Only a properly administered pressure test can verify this and only a new Crankshaft can solve the problem if verified.
The Inner Crankshaft Seals are an integral part of the Crankshaft. If excess Oil came out of *both* Cylinders, the source may be from either the same Inner Crankshaft Seals (both/rare)or from a leaking Rotary Valve drive-shaft Seal or from a leaking internal Check Valve in one or both Oil Injectors. A similar pressure test can verify the integrity of the Rotary Valve drive-shaft Seal, but the Oil Injection Check Valves would require a different test.



 davidc posted: 11/30/2010 7:51:41 PM   

1997 seadoo gtx won't start after sitting for a few weeks. Brand new and fully charged battery. Take plugs out and it turns over like crazy. Forward cylinder has oil in it and it will spit it out after several crankings. When i try to start it with plugs in it goes "clunk". Where is the oil coming from in the forward cylinder? the rear cylinder is clean.


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