Over Charging to (16.6v)

[Brightondale]

So, I've got a 2002 SeaDoo Sportster LT that I bought in 03. In 05, the regulator bracket broke off the stator on both engines. I just zip tied it to a near by wiring harness and it has worked fine for 10 years. Just this weekend, I noticed my aux volt meter saying I was charging to 16.6v while running at speed. I turned some accessories on and got it down to under 13.5 the rest of the way home. On the way back, I toyed with trying to see which engine was the culprit by running one at a time (slow speed) but they both gave the same general readings. My question is if this is for sure a bad regulator(s) or is there another possible culprit? Until this weekend, I've never seen it charge higher than 13.8v.

I now realize that in removing the bracket, I should have put in a ground wire but it's that appears beside the point now. I will reground it now though.

 

[Coastiejoe]

As long as things are grounded as they should be, I think it has to be the regulator.

 

[Andy4k6]

As it seems to be both engines acting the same, could it be the gauge that's wrong or have you already checked ?

 

[Brightondale]

Yeah, the gauge checked out against a similar but different model plug in type.

 

[Brightondale]

Acceptable Voltage Range / Overcharging @ 16.6v ?

I'm still concerned my boat is overcharging. I feel like if I let it, it would climb even higher than the 16.6v I saw before I 'stepped in'. My biggest concern is frying the MPEM.

My first question is what is the normal voltage operating range for this charging system?

So here's what I tried. Bought two new voltage regulators from jetskiplus. That didn't make a difference. Swapped out the battery. That didn't make a difference. My testing of this was done in one evening and I've not been running for extended periods. Now I put the original OEM regulators back on. Back in 2006, the regulator brackets vibrated their way loose and sheared the bolts off holding the mounting brackets that held them to the stators (each engine). I zip clipped them to the nearby wiring harness and it's worked fine since then. I'm now wondering if it's possible if I've disrupted the ground and maybe that's my problem? But why now after all these years would it be a problem? Anyway, I wanted to get a ground wire on each that would simulate the connection the bracket may have made and see if that makes a difference but ran out of time tonight.

Last, is there an adjustment on the stators for the voltage output?

Sorry if I've repeated any info here.