Dess key? Post?

[j_smiley13]

Hello Sea Doo Lovers,
I have a 05 3d.
I'm having issues with it not shutting off.
With the key on, it starts and runs fine.
It shuts off when I hit the button.
BUT it will not shut off when I remove the key.
Also will not start without key on.

As far as I know I've checked all fuses.
I think there are only 2 spots where there are fuses..

I'm thinking of replacing dess post, but the more I read the less I think it's the problem.

Any ideas or help would be greatly appreciated.

Thanks

 

[mikidymac]

With the key on, it starts and runs fine. Correct
It shuts off when I hit the button. Correct
BUT it will not shut off when I remove the key. Sounds like the DESS post isn't releasing.
Also will not start without key on. Correct

I would replace the DESS post. Everything is functioning correctly except the DESS post isn't releasing it's contact when the lanyard is removed.

 

[j_smiley13]

Thanks I will try asap and report back.

 

[Sportster-2001-951C-Stock]

I agree, sure sounds like the DESS post.

 

[j_smiley13]

Hello there,
So I installed a new post, and unfortunately the machine is still doing the exact same thing. It still will not shut off when the key is removed.

Anyone have any other ideas?

Thanks

 

[Sportster-2001-951C-Stock]

As a test, I'd disconnect the DESS post while it's running and confirm it doesn't stop that way. The post has a magnetic switch inside, normally when this switch opens (Removing the DESS cap does this) the MPEM senses this and shuts off the engine.

 

[j_smiley13]

As a test, I'd disconnect the DESS post while it's running and confirm it doesn't stop that way. The post has a magnetic switch inside, normally when this switch opens (Removing the DESS cap does this) the MPEM senses this and shuts off the engine.

I could try that, it is a brand new post that I installed.

 

[Sportster-2001-951C-Stock]

I understand it's new. This is surprising b/c the MPEM detects the open magnetic switch as a shutdown command.

4-tec is not my forte though, so I'm not sure exactly where to lead you from there. If you have a factory service manual, the electrical schematic should show the circuit connecting back to the MPEM.

 

[j_smiley13]

Thanks for all the help, I'm now having another possibly unrelated issue. The 3D is starting and runs fine up till 3/4 throttle and then bogs out.

Maybe I should start with a compression test?

Or maybe where the 2 issues started around the same time could it be mpem related?

Thanks

 

[mikidymac]

I would check compression just for peace of mind.

Is yours the 787 RFI or 951 DI?

Either way you should change the fuel filters in the tank.

 

[j_smiley13]

K thanks I will do both and report back.

 

[j_smiley13]

It's a 787.