mpem

My 951 GSX sucked up a bunch of weeds and overheated and took on a bit of water. I was w able to rectify the issue and get it back on the water for a short duration before it dying and unable to start back up. Since then I haven’t even gotten a beep from when I put the key on or hit the start...

I know this is a longshot, my MPEM started smoking yesterday. my thought was that some wires were grounding out. I did a Continuity test and it seems that a lot of the positive wires, including the ones going from the positive battery terminal to the solenoid, have continuity to ground. What...

The Diode actually 'Shorts Out' & is designed to Blow the 5a Fuse, as protection to stop further damage to the MPEM. Reversing the Battery +/- will Blow ('Short Out') the MPEM Diode (there can be other rare occasions it will Blow / 'Short Out'). So if you carefully remove the Black Stuff; One...

Hey guys I have a 1996 speedster . Couple years ago put 2 new motors in it. Now I have lost the original mpem in it. It keeps blowing the 5 amp fuse. I’m looking into getting the new retro fit kit from seadoosource.com. I have talked to the guy a couple times about doing it but just curious if...

Hello, I purchased a 94 XP last year and starting work on it as of recently. Was told by the guy I purchased from that he heard a pop from the MPEM and I have not been able to find a 278-000-071 to replace it. I did some research and found that the 95 GTX has the same engine and I believe that a...

I have a 1998 GTX LTD recently acquired. History: It had a top end rebuild by previous owner. However, previous owner had wired the battery ground to the starter plus terminal… I got it running after repairing the rear electrical box and replacing the rear harness with one pulled from a 99...

I have a 1996 seadoo gti 717, i get no beeps when key is on post, no crank, no start no spark. Checked and replaced the harness. If i hit the start button once the oil light comes on for 33 seconds but no beeps. Replaced mpem with aftermarket no dess mpem and still no beeps and no crank. Tested...

I just bought 2 PWC last week. A 1993 GTX and a 1996 SP. The SP starts to crank the second the battery is connected even without the safety switch pressed in. If I push the start button it will fire right up but then won’t shut off until I disconnect the battery or the battery dies. I also...

I recently bought a Seadoo XP with a 657x engine that is non-running with no spark. The previous owner said they saw smoke come from the MPEM and so I ordered a aftermarket one that’s compatible with part 278-000-070 (For 587 engines or 92 XP from sellers page). In my jet ski it is part...

Hi guys - I'm a newbie to this forum and pwc's in general. I'm also fairly technically and mechanically useless! :) So now that I've gotten that out of the way, I wanted to describe my issue. I purchased this unit earlier this spring and have had issues with it since. I have had someone...

Has anyone done the diode replacement procedure on a 97 Challenger (single 787) MPEM? Just wondering if someone knows the exact diode location so that I can reduce the amount of digging required to find it. Thanks!

Can anyone point me to a Southern California based company or person that can perform a timing adjustment for a rebuilt GSXL?

Looking to tweak my GSXL performance short of buying parts from Mel just yet. Testing the waters!

I am reading a P1607 code on my 2004 gtx sc. when I looked in the manual, it said no service action. Has anyone fixed a P1607 issue? I have started checking the fuses in the MPEM for corrosion, but no luck yet. should also mention that when I try to start the ski up, there is a spark on the...

I have a similar issue to the “Confirmation of a dead MPEM on a 1994 GTS” thread. I have a 96 GTS and a 93 GTS. I know the MPEM is not listed to work, but could it? Would the STOP switch now need to be a START/STOP switch. It has progressively gotten worse about running after starting. It was...

Problem solved. MPEM at fault.

95 XP does not crank with start button, dash turns on and then turns off It DOES crank by shorting solenoid, and also DOES crank on its own (only for a second) when key is attached, and only when grounding the MPEM to the stator for the first time, otherwise the stator connector must be...

If anyone has one of these i would be interested in buying. I have a RXT 215 2005 model with broken MPEM and need a new working one. Part number is 278001724. I heard that i need the 2005 or 2006 one because T.O.P.S implementation is different in those than older ones.

The MPEM 5A fuse blows whenever I attach the stator harness to the mag cover Engine turns over by shorting the solenoid Disconnecting two yellow wires from rectifier still blows fuse, disconnecting red wire from rectifier still blows fuse One of the 5A fuse terminals (But not both) has...

Hey all, are there any work-arounds to replacing the entire MPEM? Which component(s) generally blow? And can I order them? My little sister thought it was ok to jump/charge the boat battery while the car was running. Just trying not to spend $500 on the entire thing. Thanks!