1999 Seadoo GTI 717 Flywheel

[lmarkie74]

Can the magnets on a GTI 717 flywheel become weak? If so, how can you measure the strength?

 

[etemplet]

What leads you to suspect flywheel magnets? What is the problem?

 

[lmarkie74]

Beating my brains out trying to get spark out of my 1999 Seadoo GTI 717. I have tried a new MPEM, new coil, and a new stator. Leads on Black and Black/Red and Yellow and Yellow/Black ohm within specifications. Getting 3.5 volts AC on Yellow and Yellow/Black leads and 2.5 AC on Black and Black/Red leads at cranking. Readings are the same as the old stator I removed.

I bought the stator from Jetunit. They suggested weak magnets on the Flywheel. I have noticed in pullying the flywheel, that flywheel is easy to get out. In fact, it falls of the stator. Normally you have pulling pretty hard to seperate the flywheel away from the stator poles.

 

[etemplet]

Yep these flywheels will pinch a finger for sure. Strange situation indeed.

 

[lmarkie74]

Little lesson on the magneto/flywheel please. I am looking for 20 VAC on the yellow and yellow/black wires of the stator at crank and 20 VAC on the the black and black/red wires of the stator at crack. If I disconnect the stator to the MPEM (4 wire plug to the mounted on cover) and jump the starter, will I get 20 VAC out of the stator? Or, does it need a 12V charge (whatever you call it) to get the 20 VAC?

 

[etemplet]

I've never checked A/C voltage on the skis but I've watched a video of it and it was check at the rectifier and a given RPM. I'm not sure how valid a test would be with the engine turning on a few RPM.

 

[lmarkie74]

I would make sense to me, that if you don't get voltage (AC) to the rectifier on crank, you won't get spark to the coil (12vdc) and therefore to the plugs to start the engine. ???????