wire...
Have you gone through all your wire connectors? Are you riding in a lot of salt water?
You can do advanced tests on your mpem by using the start/stop button. When you say intermittent spark, in which way is it intermittent. Do you get spark sometime and then, for no reason, find you have no spark at all?
There is very few of the GTI's ever reported to having any kind of problems, much less like yours. The GTI is a very reliable ski.
Lets look at a couple things. You must mentioned the start/stop switch. This could not have any affect because it's sole purpose is to spin the motor over.
The Lanyard and post would keep it from spark, but it would also keep it from spinning the motor over.
The MPEM is what signals the coil for spark. I'm at work and without a shop manual but in many of these skis, the mpem is what is in control to step up the power in your primary and secondary windings in the coil.
You said you've changed out the MPEM's and coils, same problems.
Is there anything unusual? Any wires that are loose that don't seem to have a home?
Have you had it running recently? If so, were you able to test the charging circuit output at the battery? In most cases, the magneto builds a high voltage AC current that is sent to the rectifier to convert the charge to DC and the regulator steps it down to about 14 volts. But, some of that charge is re-directed to the ignition coil.......
Since you've been troubleshooting with spare equipment, I think you should be looking at yoru wiring.........:cheers:
