95 seadoo xp need help

[A Better View]

Have been over this and over it again. If i keep the start and kill button pushed it will run, idle, rev but as soon as i let off the start button it dies. Whats the issue with this thing?

 

[JeremyD615]

The first thing to do would be to check the start/stop button itself. Unplug the connector and do a continuity test to see what it does when you press and release the button.

 

[A Better View]

Its working pressed because it runs pressed but when i release it it just dies. Its only a 2 wire connection. Does the current or should tge current be circling through that switch after initial start ?

 

[JeremyD615]

No, it should show a closed circuit when the button is pressed and an open circuit when it’s not.

 

[Ckrawiec]

Let's think this through:

Ski will start and run with button pressed...means solenoid connection is made, current flows through solenoid to spin the starter, the starter spins the flywheel, the engine is pumping, creating vacuum to pull fuel into it through carbs. Spark is generated to keep the pistons pumping. The stator is spinning and should be creating voltage to the Rectifier which feeds DC volatge back to the battery (if all is working as it should). The ECM should be managing all of this, in a perfect world.

Let go of button, ski stops...huh? Letting go of the button should drop the starter out of the equation, the starter did its thing so we don't need it anymore (meaning the solenoid should drop out too as it did its thing to get the ski started.) The combustion process should be maintaining itself with fuel, air, spark and timing now.

OK...think F.A.S.T. (fuel, air spark, timing). The fact that she starts and runs sorta rules out F, A and T. I think you are losing SPARK somehow to keep the engine going.....could be the induction pickup coil...BUT the ski runs holding the button which I think is forcing the starter to keep the flywheel spinning (so stator is spinning which the pickup coil is looking for) to keep the combustion process going by force.....hmmmm.......could be the ignition coil itself.....is the coil not getting its signal from the ECM with the button released (but releasing the button kills the mechanical process of turning the engine over thus dropping out the signal (so I'd rule that out)...hmmmm....bad grounds, wiring, corrosion......start checking everything in the harnesses...this sounds ELECTRICAL in nature....IMHO. It's a '95...she's old.

 

[JeremyD615]

Remember these are mechanical switches. It’s very possible that the switch is shorting when you release it, thereby sending the signal to the MPEM to kill the motor... One contact closure signals it to start, the next signals it to stop. If you release the button and a worn switch closes the circuit a second time, it will kill the motor.

 

[Ckrawiec]

Remember these are mechanical switches. It’s very possible that the switch is shorting when you release it, thereby sending the signal to the MPEM to kill the motor... One contact closure signals it to start, the next signals it to stop. If you release the button and a worn switch closes the circuit a second time, it will kill the motor.

Indeed...rule out the Start/Stop button first.....then start digging in deeper as necessary. Start simple/easy things first.

 

[A Better View]

I have cleaned every wire end there is to clean on this thing and end up in the same hole. Hold push button start it runs and runs good. Let go of button it dies.

 

[JeremyD615]

It may not be an issue of clean. Those switches are mechanical, so they do eventually wear out. You need to figure out what it’s doing... You can either test it, or just go ahead and replace the actual switch...

 

[A Better View]

Thats the only kind of switch to use to my knowledge. I would put a separate start switch if i had knowledge of how to disconnect that switch without it being involved with starter.

 

[Ckrawiec]

Its working pressed because it runs pressed but when i release it it just dies. Its only a 2 wire connection. Does the current or should tge current be circling through that switch after initial start ?

Technically yes, I think so....the Start/Stop button is a mechanical (spring loaded switch)....push on = signals the ECM to begin the starting sequence and keep circuit on (= closed)...the SWITCH is NORMALLY OPEN, Push it again and the circuit should break and take the switch to ground (which the ECM then sees)...really sounds like the internal spring is not holding it closed, thus the ski thinks it got pressed again and immediately goes to ground.....and kills the ski (as it should).

I'm leaning towards JeremyD615 prognosis...bad S/S switch.

 

[JeremyD615]

Just either search eBay for “Sea doo start stop switch” or call Westside Powersports for a used one. I think you’ll be up and running with the switch replaced.