Jump-started 1998 Seadoo GTX Limited and is now bricked

[Liamjoseph2]

Hello, Last summer in September I was going to take my ski out of the water for the year (I have it on a ramp for the summer), and the battery was dead. I used a high power lithium-ion jump pack on it and it started for about 30 seconds then shut off and never turned back on.
Upon inspection the 15 amp fuse blew so I replaced it to no avail. I stored it for the winter and started working on it again this summer. I assumed it was the MPEM so I bought an aftermarket unit from Arieltek, but the quality was so bad I couldn't even fit the connectors in due to how bent they where and it was also covered in glue, so I sent it back.
Due to the fact that the used MPEMs on eBay come with no returns and no warranty, I wanted to troubleshoot that the issue is in fact the MPEM. I tested the red/purple? wire for power on the MPEM connector and was getting an oscillating 0.5v where I would have expected 12v so that is a little concerning.

Any tips for what I should do / try next? Should I just buy the new MPEM?

All help is extremely appreciated, Thank you!

 

[mikidymac]

Used, tested and guaranteed MPEM's can be purchased from Westside Powersports Seadoo.

 

[Liamjoseph2]

Thank you for the tip! So does this mean you think a new MPEM will solve this issue? Or just giving me the best place to buy?

 

[mikidymac]

More than likely the MPEM, that is why we tell everyone to never jump start these and Seadoo even installed a sticker that says, "DO NOT BOOST BATTERY".
Can't say that is 100% your issue but 99% sure.
Westside will also test your MPEM.

 

[Liamjoseph2]

Thanks for the tip, I realized this too late unfortunately.

I will go down the route of buying a new one / sending mine in for testing via Westside Powersports.

Thank you very much for the help, I will update if this does not fix the issue.

 

[lavasioux]

Good luck!

 

[Liamjoseph2]

More than likely the MPEM, that is why we tell everyone to never jump start these and Seadoo even installed a sticker that says, "DO NOT BOOST BATTERY".
Can't say that is 100% your issue but 99% sure.
Westside will also test your MPEM.

Alright I just bought a MPEM from Westside Powersports, it was $395. According to their website, they mostly don't accept returns and if they do they charge a $150 fee. Regardless hopefully they end up being more forgiving then an eBay seller in the case it doesn't solve my issue.

(BTW your profile picture is incredible)

 

[mikidymac]

Alright I just bought a MPEM from Westside Powersports, it was $395. According to their website, they mostly don't accept returns and if they do they charge a $150 fee. Regardless hopefully they end up being more forgiving then an eBay seller in the case it doesn't solve my issue.

(BTW your profile picture is incredible)

At least they are honest and guarantee the parts.

Thanks for the complement one of the members here was an aspiring graphic artist and made if for me. The Noid is on my paper towel dispenser in the garage and he saw it on one of my build threads.

 

[Liamjoseph2]

UPDATE

I received the new MPEM from Westside Powersports today and installed it... and nothing happened. So I called Jess form Westside Powersports to assist my diagnoses of the issue.
After trying some stuff and going back and forth with Jess, I figured out that my rear 15 amp fuse was blown (I didn't know it existed in the first place, oops).
So after this I got my old MPEM to light up the gauge cluster! So I tried to start it, and just as it was about to start, the gauge cluster died.
So I checked both fuses again and the front fuse was blown.

I contacted Jess and told him this, he informed me that it was "95% a short to ground inside the stator housing". So I guess I need to replace the stator now, and I have no idea where to start on this. I looked it up on YouTube and didn't see any videos specifically referencing replacing the stator on a carb 951.

Anyone have any advice on this topic? Thank you.

 

[hingstin]

test the stator first, pull the plug on magneto housing a 6 pin plug, 5 or 6 leads are attached 3 from stator 1 ground ( usually not connected in rest of harness) and 2 for the Pickup coil
Measure the "yellow ones
Winding 1-2
winding 1-3
Winding 2-3
Should be about 1ohms ( o,7 to 1,5 is probably ok)
also check between grounds and winding that there is Zero resistance ( infinity)

But probably it is shortened, due the big currents.

But it is pretty straight forward to open the magneto on the 951.

12-13 small 6mm bolts and the engine Mount, ( you have to lift engine in that end put a piece of wood over opening in hull and a hold it up with a belt/rope around the tuned exhaust)
also detach cable for oilpump and oil hose

then housing is off, stator is inside housing and then easy to remove on the "table"

here on a XP 2001 951 carb model..
do you want more indo , just tell..
dont loose the small plastic coupler that inside stator ( it connects oilpump to nut on flywheel)
Put it into pump ( in middle of stator when you replace everything, it will find its place on the flywheel by itself)