2002 seadoo gtx di low compression

[Dave83]

I just recently purchased 2 2002 seadoo gtx. Went to the lake and one keeps beeping at me 12volt low code and the other ran great for about an hour and died in the middle of the lake. Started up ran good for about 10 more minutes died again then wouldn’t start back. Got to the dock loaded it up fired right up out of water put it back in would fire up and die. Did some reading on here about same issues and went and got a compression tester sure enough 35 lbs on front cylinder and 85 on back. Pulled head pistons and cylinders don’t look horrible. Back has some rust in it looks like. Think the rings are stuck?

 

[mikidymac]

That top end is toast. You can see the vertical scoring on the first picture. Pull the RAVE valves and look into the slots and I am sure the sides of the pistons look bad.

When it kept dying and you kept restarting it , it was seizing.

 

[Dave83]

Yeah piston is toast. How would this happen the other piston looks brand new. What size is a factory piston on these? Thank you for the help

 

[Dave83]

To me looking at the head the back cylinder was getting oil and the front wasn’t. What do I need to look at for that problem

 

[mikidymac]

You need to make sure the little oil lines from the pump to the intake are clear and the nozzle is clear. If it is getting oil then your next suspect is a bad fuel injector was running that cylinder lean.

It typically isn't just a lack of oil that seizes these it is a lack of fuel and oil. Rember oil is the lubricant but the fuel is the carrier.

It's hard to say for sure as a worn cylinder/piston can allow hot gases to remove the oil film, lack of oil and fuel and even water ingestion can remove the oil.

 

[etemplet]

Replace the fuel filters.... if they are anything like the RFI... In the tank.

 

[Dave83]

Etemplet before I used them I drained the gas changed the plugs and new filters.

 

[etemplet]

Way ta go !!