I am trying to figure out what is wrong with my 2004 Seadoo GTI with a 717 motor.
I bought it last year at the end of the season. It was a repo, so I know very little about it. It ran great and had good compression 130 psi on my cheap gage in both cylinders. Ski looked very clean inside and out. I winterized the GTI (fogging, antifreeze, battery, etc. per the instructions).
In spring I summarized it, started it up on the hose and ran fine. Took off seat and it had a lot of water in the hull. Ran it again with the seat off and water was leaking out of the side of the pump end cylinder jug, just above the exhaust. Cracked cylinder jug. Must have froze. Don’t know how, since I put a lot of antifreeze in it. I bought a used jug on ebay. Swapped the cylinder sleeves by heating them in the oven to 400 for ½ hour. They both slipped right out and the good sleeve slipped right into the used jug easily. Aligned the bolt hole pattern/ports and I put it in a vice with some pressure on it to let it cool. Seemed to work great. Both cylinders and pistons had some scoring on the intake side of the pistons. I used some 220 grit paper on a block with some injection oil to just knock of any high spots on the pistons. Cleaned and lubed everything with injection oil and reassembled engine per manual. Started and ran great, no external leaks! I don’t know if this problem relates to what happened next-
I ran about one whole tank through it at the beginning of summer with no problems. Filled it up on July 4th and hit the water. My wife’s cousins were riding it and it just died (ran about ½ hour that day). The driver said it just suddenly sputtered and died, would not restart. They towed it back with my other ski (they did not know to block the water inlet). They went slow towing it in. I pulled the plugs, cranked it, no water came out of cylinders. New plugs in it. Cranked and cranked, no start. Battery was getting low after a while. At home, I pulled the plugs, fogged the engine through the plugs and intake. Plugs had some moisture on them. Charge battery. Good spark. Compression is 130 in both cylinders. Cleaned fuel filter (some minor stuff, not plugged). Pulled flame arrester. Can see accelerator pump squirt fuel when throttle pushed.
Engine would run very poorly (below a normal idle rpm) for few seconds if I chocked it heavily and cranked a while. Pulled plugs. Pu a couple drops of fuel in cylinders. Will fire on the few drops of gas in the cylinders (just a few revolutions), then die.
What do I check next? Could the rotary valve drive gear have failed? How do I check this without disassembly? Where do I go from here? Please help!
I bought it last year at the end of the season. It was a repo, so I know very little about it. It ran great and had good compression 130 psi on my cheap gage in both cylinders. Ski looked very clean inside and out. I winterized the GTI (fogging, antifreeze, battery, etc. per the instructions).
In spring I summarized it, started it up on the hose and ran fine. Took off seat and it had a lot of water in the hull. Ran it again with the seat off and water was leaking out of the side of the pump end cylinder jug, just above the exhaust. Cracked cylinder jug. Must have froze. Don’t know how, since I put a lot of antifreeze in it. I bought a used jug on ebay. Swapped the cylinder sleeves by heating them in the oven to 400 for ½ hour. They both slipped right out and the good sleeve slipped right into the used jug easily. Aligned the bolt hole pattern/ports and I put it in a vice with some pressure on it to let it cool. Seemed to work great. Both cylinders and pistons had some scoring on the intake side of the pistons. I used some 220 grit paper on a block with some injection oil to just knock of any high spots on the pistons. Cleaned and lubed everything with injection oil and reassembled engine per manual. Started and ran great, no external leaks! I don’t know if this problem relates to what happened next-
I ran about one whole tank through it at the beginning of summer with no problems. Filled it up on July 4th and hit the water. My wife’s cousins were riding it and it just died (ran about ½ hour that day). The driver said it just suddenly sputtered and died, would not restart. They towed it back with my other ski (they did not know to block the water inlet). They went slow towing it in. I pulled the plugs, cranked it, no water came out of cylinders. New plugs in it. Cranked and cranked, no start. Battery was getting low after a while. At home, I pulled the plugs, fogged the engine through the plugs and intake. Plugs had some moisture on them. Charge battery. Good spark. Compression is 130 in both cylinders. Cleaned fuel filter (some minor stuff, not plugged). Pulled flame arrester. Can see accelerator pump squirt fuel when throttle pushed.
Engine would run very poorly (below a normal idle rpm) for few seconds if I chocked it heavily and cranked a while. Pulled plugs. Pu a couple drops of fuel in cylinders. Will fire on the few drops of gas in the cylinders (just a few revolutions), then die.
What do I check next? Could the rotary valve drive gear have failed? How do I check this without disassembly? Where do I go from here? Please help!
