584093 99 johnson 150 rectifier issue

phoenixgold2100

Petty Officer 2nd Class
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Feb 3, 2013
Messages
154
I have a looper v6 that runs well. However I am having this issue with the charging system and tach working intermittently. Some days it works fine, other not at all or for a few minutes at a time.

It was a new rectifier installed and worked properly for one season then started the issue.

I've checked the ohms off the rectifier, I was told to wire it up to a household AC plug and see the DC coming out of it and couldn't get readings.

I've tried hooking the gray wire to either of the yellow wires coming from the stator and the tach does NOT function.

Also does not charge.

Is this a stator issue? I did notice maybe a bit of melt on the stator rectifier connection. Other than that it runs as it should. Thanks for the help.


Is Joe Reeves still on here? Appreciated.
 

phoenixgold2100

Petty Officer 2nd Class
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Feb 3, 2013
Messages
154
I have tested the stator, running I get 20 amps maybe 22.

Ohms are 1.4 then drop to 0.8 on the two yellow wires.

I am not sure if these are spec numbers. I've lost my glasses and can't see the small print on the spec sheets..

Engine starts and runs fine but no tach no charge..

Also there is no vin plate on my engine any other way of figuring out what year it is ? The rectifier I put in two years ago is 584093
 
Joined
Apr 1, 2020
Messages
57
I had the same problem my stator was melted a bit and the tach was working intermittently some times not at all and didnt seem to be charging so i did change the stator and it did not fix the tach problem so i did the test where you put the gray tach wire on the stator terminal still no tach. i ended up getting a new battery and a new tach all is well now the tach was bad it was 28 years old
 

phoenixgold2100

Petty Officer 2nd Class
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Feb 3, 2013
Messages
154
Did it just start charging? Or did you change the rectifier also?

I've tested my stator a few times and get the same numbers .. Really don't want to spend the 500 for no reason..

My tach was sticking previously and would point toward a bad tach (ordering one now) but it also doesn't charge. Or does intermittently.
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,102
Gee, A lot of V6 motors from that year have 35 Amp water-cooled voltage regulators. Do you have a service manual for your motor?

They have tests for stators, voltage regulators. and other charging components. Bridge rectifier tests can be done with a simple voltmeter/ohmmeter.
 

Chris1956

Supreme Mariner
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Mar 25, 2004
Messages
28,102
I would suggest a service manual. As of now, we have no idea what motor you have, so it is hard to guess if your readings are in spec..
 

Vic.S

Rear Admiral
Joined
May 4, 2004
Messages
4,719
Sorry you said the Id plate is missing, therefore dont know the model number

The stator will have a fairly low DC resistance. You say you have measured it at 1.4 ohms ... That sounds reasonable and if you are getting 20 volts from it it is probably OK.

Testing the rectifier by connecting it to the household AC supply does not sound like a sensible thing to do. Id think you have probably fried it.

You can test the rectifier, but it hardly seems worth the bother, by following the procedure in the CDI Electronics Troubleshooting Guide
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,102
Well, a 1995 150HPV6 60* looper (J150EXEOM) shows a 35 A water cooled voltage regulator..

.RECT/RGLTR&GSKT AY Regulator - Outboard 0439561

These supply regulated DC plus an AC signal to the tachometer. If she is charging, I would check the tachometer wiring harness for melted or bare wires.
 

phoenixgold2100

Petty Officer 2nd Class
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Feb 3, 2013
Messages
154
No charge. The tach worked a few times this weekend but confirmed the volts did not go up while it was working. Only worked for a few seconds on and off.

I changed my battery as I had a deep cycle starting battery.

The Ohms out of the stator are 1.4 then drops to 1

Also when I wired it to household ac I used a transformer and only had 25v AC going to it. I should have had a DC reading of some kind I would think. I got nothing.

At this point I am going to throw another rectifier at it and hope for the best.
 

Crosbyman

Vice Admiral
Joined
Nov 5, 2006
Messages
5,657
if you are handy at this ...

it would not regulate ... but you could do some "basic" testing with 3 phase rectifiers very cheap on EBay

if I am not wrong your stator is putting out 3 phase of AC voltage at 120 degree intervals versus a common 2 wire with AC at 180 degree intervals ( common sine wave)

the 3 phase rectifier will output DC just like a 2 phase rectifier would…. and only $5 and up…... free shipping


3 AC wires IN 2 DC wires OUT

http://www.youtube.com/watch?v=ga1Cjymj6ms&feature=youtu.be

up to you
 

Crosbyman

Vice Admiral
Joined
Nov 5, 2006
Messages
5,657
sorry I posted a wrong link to find cheap rectifiers !!!

https://www.ebay.ca/sch/i.html?_nkw=3+phase+bridge+rectifier


2 yellows usually means AC _DC full wave rectifier there again full wave rectifiers are not expensive if you just need to test what DC you can generate from the AC you get off the stator

https://www.youtube.com/watch?v=s2yl5rsH2uk

https://www.ebay.com/itm/Aluminum-H...epid=0&hash=item3664630e7c:g:yvkAAOSwMEBavZJF
https://www.ebay.com/itm/10x-KBPC50...rand=Unbranded&_trksid=p2047675.c100005.m1851
 
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