View Full Version : Shop owners should read, get prepared for spring

All Things Custom
03-03-08, 02:23 AM
If you are getting skis in your shop with the 5 Amp fuse blown you could save your customers some $$$$$.

You know you have a box of these MPEMS in the corner... LOL.

Check out the ebay link below.


03-03-08, 10:00 AM
Information about the MPEM’s functions are scattered in many post through out the forum. Although “All Things Custom” is capable of repairing MPEM’s that have the problem of continuously popping the supply current, 5 amp fuse, this doesn’t mean that if your MPEM is bad, that fix will completely repair your module.
Since the MPEM has several other functions which can fail, make certain that your problem is limited to just the fuse. While the MPEM is responsible for interpreting information, distributing information, start/stop function, DESS, ignition timing curve and the engine rev limiter, the continuous loss of that 5 amp fuse may not fix the problem with one of these functions, if the micro-processor fails.
Also, in the newer models, the MPEM works in tandem with the ECU (electronic control module) and the “Engine Management System” to interpret and send out signals to control the engines operation and efficiency.
While I support “All Things Custom” in having a great deal in his e-bay store for the ever expensive cost of a replacement MPEM, it should be noted that he is specific to what type of problem his repairs will correct. And that is, only if you have a problem keeping that 5 amp fuse from blowing out.
Please remember, there are several things that can go wrong with an MPEM not related to a problem fuse.:cheers:

All Things Custom
03-03-08, 10:17 AM
well said seadoosnipe....

And let me caution you all... If you are encountering the 5 amp short as described, PLEASE do not put a larger fuse in your MPEM to try and rectify the situation.

The 5 amp circuit is a protection circuit that protects the rest of the MPEM, that has a standard 15 AMP capacity... I have seen many repairable MPEMs ruined by putting a 15, 20, or 30 amp fuse in this location only to have it blow as well.

get it repaired before causing further damage.

03-04-08, 03:23 AM
And I second that motion......and better yet, you should never replace a fuse in any electrical connection with one of a higher amp. These sizes are recommended for a reason. If you blow a fuse in your wiring somewhere, say to your bow lights and you put a larger fuse in it. It may work, for a while. Until the wire heats up and melts, shorts out and possibly catching fire.
The recommended size fuse is normally printed in the cap or on the box at the fuse. Please, don't use anything other than the recommended fuse...:cheers: