Merc XR2 upgrading from rectifier to regulator - advice needed.

**tristanlee85** · 05-15-2020, 12:24 PM

Well the good news is I have great charging voltage now. Bad news is my RPMs read about half what they should. Usually around 50mph I see 4000 - 4200 if I recall. I was getting around 2000 with the new rectifiers/regulators. I may need to pull the gauge and see if there are switches on the back I can tweak.

**Merc 2.5** · 05-15-2020, 03:15 PM

Back of guage Should b a switch/ dial swapping from 3,4 6 etc , twist it back and forth dozen times or so to try clean little contacts inside of it.

**90 5.0** · 05-20-2020, 02:11 PM

Originally Posted by rgsauger

My water-cooled reg literally caught on FIRE!!! Scared the chit out of me. 2.5 empty fire extinguishers and it was still blazing. Battery was feeding it power to a direct short. Look at how a 40 amp is set up on a pro max with dual regs

Remeber that day well.

probubaly only time in history a shadow bassboats been towed back by a xr2001 prostock drag boat 😂

**rgsauger** · 05-20-2020, 09:09 PM

Originally Posted by 90 5.0

Remeber that day well.

probubaly only time in history a shadow bassboats been towed back by a xr2001 prostock drag boat 

Dammit, I thought you had forgotten that!!!!!

**tristanlee85** · 06-22-2020, 11:52 AM

Well well well, what was a good charging voltage for a couple days on the water went south yesterday when I noticed my tach stopped working and my volt gauge was only reading ~12.3v under load. Pulled the hood off today as I suspected something with the new rectifires and found this:

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**rgsauger** · 06-22-2020, 05:58 PM

Damn, bud, that sucks!!!!!!!! Glad you were ok. Which ones were those?

**tristanlee85** · 06-22-2020, 09:54 PM

Those are: https://www.ebay.com/itm/New-Voltage...53.m2749.l2649

I ordered 2 more of these: https://www.ebay.com/itm/NEW-VOLTAGE...53.m2749.l2649

$50 more for the set, but fingers crossed that being more expensive will mean a little better quality.

**Pilotryan** · 06-12-2022, 10:59 AM

Did those new ones solve your issue?

**rgsauger** · 06-12-2022, 10:30 PM

Originally Posted by Pilotryan

Did those new ones solve your issue?

honestly, I have run the eBay ones for years now and had no problem. For $25, I carry a spare. Replace them in pairs.

**Pilotryan** · 06-13-2022, 05:15 AM

My water cooled rectifier just went out on my XR4. I think my system is the 40v because of the red flywheel and this style rectifier. I just need to figure out some part numbers for the 5 wire trigger to replace my 2 wire, and then a couple rectifiers/regulators.

**rgsauger** · 06-14-2022, 11:49 PM

If you don’t really need the 40 amps, put on a 16 amp flywheel and stator and one rec/reg

**RoyE** · 06-15-2022, 08:49 AM

Originally Posted by rgsauger

If you don’t really need the 40 amps, put on a 16 amp flywheel and stator and one rec/reg

I like that option the most

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**rgsauger** · 06-15-2022, 10:06 AM

Roy,
That's what I did, too. Most of my festivities are well over 3K rpm so the 16A has been just fine for my purposes

**Pilotryan** · 06-15-2022, 10:52 AM

Ok I’m going to do that. I’m having trouble locating a 16 amp flywheel. Do either of you guys have a part number for that, or know where to get one that isn’t $500? Same goes for the 16 amp stator. I think I’m showing the part number for that one as 174-5456-16.

**David - WI** · 06-15-2022, 01:54 PM

You might look into these. You use one of these for the 40-amp system... and no water-cooled bull****. I had to buy a special crimper...Aircraft Tool Supply #E300-005

https://rmstator.com/en_ww/rm30504h
http://roadstercycle.com/

Connectors for motor side, first set: http://www.easternbeaver.com/Main/El...onnectors.html