657x (basic) 95 seadoo - Beeps and stops only at WOT

[r3cc0s]

this is a pre-heat sensor boat, so no sensor...

can't seem to find out why this would be the case, and should have nothing to do with key coding as the boat has no programmable keys on the mpem

pisser is coming out and the temp off the block is cool the whole time and runs perfect at all throttle positions until WOT...

just beeps once and dies, and I can't seem to find anything that indicates why....

 

[mikidymac]

Not sure what you are talking about but it does have a heat sensor. The only thing the sensor does is activate the beeper if it is overheating. It has nothing to do with the ski quitting.

If it dies at WOT it is typically lean seizing but it could be a bad kill switch if it just shuts off.
Does it actually slow down, bog and die at WOT or is it just like someone randomly pulled the kill switch?

 

[r3cc0s]

It dies like someone pulled the kill switch, but not until after it beeps.


Could this be a mpem, kill switch or over rev condition?

 

[r3cc0s]

I really wish I had access to parts or my mechanic would... I'm now on the fence on picking up a mpem and kill switch just in case...

 

[snikwad003]

Westside powersports can test your mpem but I don't know if what you're describing would show up on a bench test.

 

[r3cc0s]

Westside powersports can test your mpem but I don't know if what you're describing would show up on a bench test.

its really funny, as mentioned above if it were a kill switch issue, this would be inconsistent, and also is not key related as it was pre-programmable era

So the only thing I'm hearing is that there is NO failsafe that will "kill" an engine for any condition, so really there is a potential that the engine is running lean (which we will check again) and maybe a overheat condition that causes the beep (but it does just beep short and non-continuious)

Also, the motor is low on compression (135/137) which maybe the gap is too big? that could be also causing issues at higher RPM?

 

[mikidymac]

That isn't low compression. Rebuild point is 120 psi.

If it just goes dead I would be looking at electrical like possibly a voltage regulator.

 

[r3cc0s]

That isn't low compression. Rebuild point is 120 psi.

If it just goes dead I would be looking at electrical like possibly a voltage regulator.

Thanks!!

Hrm regulator/rectifier was replaced and reading proper now as per my other thread.

 

[snikwad003]

You could try wiggling your key while it's running