1995 XP 720 battery still at 12.8 volts after electrical overhauled

[TurnerBFC]

Hey guys,

I was out last weekend on my 1995 XP for the first time this year and it was running fine until suddenly it died after 5min. It didn’t have enough power to turn over again and I concluded that it killed the battery – Before that weekend (in the fall), I have replaced the rectifier and the MPEM.

Yesterday I changed the stator – all these parts are brand new with the exception of the rectifier which I purchased from Nick Grillo a while back at OSD.

Yesterday I started the Seadoo after letting the battery charge for a day on my tender and it started fine. Battery light was still flashing and I put my volt meter on my battery and at 5000rpm I still only get 12.8 volts.

I am wondering if my battery is at fault. I have since purchased a brand new 16CLB Interstate battery but I won't be able to test until I get my exhaust back (had small crack that is being welded).

What am I missing???

 

[Dr Honda]

I'm not a fan of interstate batteries... and I've seen a bunch of them be bad shortly after the install... BUT... If that battery took a charge at home, and the engine started... it's not the problem.

The 720 is a very simple system. Stator, flywheel/magnets, regulator, battery. That's it.

So, start at the beginning.....

1) Make sure all the wires are connected and have good clean connections.
2) Pull the wires at the stator, and check with an ohm meter.

If those check,... then the regulator is bad.

 

[TurnerBFC]

Awesome - Thanks again Dr. Helping me since 2014.

 

[TurnerBFC]

Got into the water today. Was charging at 13.3 volts so I was happy to see that.

Got 5 minutes down the river and it dies. Battery will barely turn the ski over now. New stator, mpem, coil pack etc... no idea what’s going on. I’m about to sell it.

Any input? Won’t start and runs terribly.