2003 Seadoo GTX SC only runs for 10 minutes

[cjburt22]

Ok, so I have a customer that has a 2003 GTX SC. It will start and run flawless on the trailer and when we put it in the water, it runs perfect for about 10min then bogs down and quits. It'll try to start back but won't come back. It can sit there for about 30-45min and fire right back up and do the same thing. I was hoping for a bad fuel pump, so I replaced it but nothing changed. Any idea what else to try?

 

[ski-d00]

Have seen bad mpems do that on the early 4tecs.

 

[cjburt22]

I honestly can't think of anything else so that's why I posted here. Hoping to get some seadoo expert opinions. I'm a yamaha guy lol. Do you think if I sent the MPEM to be tested it would show that issue? I have another to send off next week anyway.

 

[ski-d00]

Probably not because it's intermittent. I always just put a known good one in test.

 

[cjburt22]

Yeah, if i had one of definitely try it. Hate to buy a new one and it not be the problem.

 

[lavasioux]

Have seen bad mpems do that on the early 4tecs.

I second this, bad ecu.

You can use a spark tester to see if you have spark whilst cranking, i'd wager spark is lost once the computer mpem heats up parts expand and a bad solder joint reveales itself.

Good luck!