I have the 1988 XR4 150 bored out to 175....That damn motor GROWLS.....hauls ass too!

every time i get a water cooled voltage regulator on a 89,thru 92, merc,v6, i use the stanley,voltage reg. from the yamaha,v4 or v6. they work well on the mercs, and have not had any come back yet for any failure.

When switching to the dual regulator setup, did you have to replace your flywheel and stator to the 40 amp system with the 5 wires? I can’t see how it would work with the 16amp stator 2 wire system.

I’ll be doing the same to my 89 xr4 150. Magnet came off the flywheel crushed the stator. Got that all replaced and looks like the stator fried the regulator 🤦‍♂️ lol

200 HP? Motor has a sticker 150. My 150 xr4 VOLTAGE REGULATOR is bad just trying to change it out.

@tristanlee85

5 жыл бұрын

Sticker is 150 because the vessel is only rated for 175hp max. It originally had a 150, but was replaced many years ago for the 200, keeping the original hood.

@tristanlee85

5 жыл бұрын

I would check the part number on your existing regulator. I don't know if the same that I purchased will match your motor. I will say I've had nothing but success with this CDI unit though.

@dwaynefriend2698

5 жыл бұрын

@@tristanlee85 my uncle stiill has his Norris Craft boat. He got it back in 1976 or 1977. It out lasted him. He passed away years ago. His boat hasn't moved since he used it last. It's in a garage and it still looks showroom new. Loved those boats. Very fast and stable. I know your boat runs real nice with that engine. I'm thinking my 150 XR4 uses the same regulator

@nickb8618

4 жыл бұрын

1989 xr4 is the same setup 88 is not

Any issues with it after two years of use?

@tristanlee85

3 жыл бұрын

Actually, kind of. After about a year of usage, I noticed my depth finder was notifying me of high voltage as the RPMs increased. I was seeing upwards of 17 to 18 volts. Occasionally would blow one of my trim relays so I would be stuck trying to jumper the posts to raise or lower the motor. I suspect some internals of this CDI unit went bad, or were on the way out. I ended up removing it and switching over to a dual regulator setup since it was a much cheaper alternative than buying another unit. I didn't want to keep running the CDI unit with fear of destroying some of my electronics.

@caden01691

3 жыл бұрын

@@tristanlee85 Yeah my OEM was doing the same thing 17-18 volts at idle. Sent the radio up in smoke. I just had a local shop order me a new OEM, let me know how that dual regulator ends up lasting.

@tristanlee85

3 жыл бұрын

@@caden01691 it's kind of a long thread but you can follow along here: www.screamandfly.com/showthread.php?350400-Merc-XR2-upgrading-from-rectifier-to-regulator-advice-needed&p=3204505#post3204505 so far everything has been good. Just don't go with the cheapest Chinese rectifiers you can find. You'll see in that thread it actually became a recti"fire" 🔥.