1985 Johnson 120 Goes WOT then falls on face

[HcK]

The only wire to have 12V should be the red on rectifier, the yellows will have no voltage with key on....if so as posted the rectifier is toast. Your ohn spec is close for th brown wir and with leads hooked to the browns only , cranking you should see 160-400V on meter with DVA adapter.

You had said before a bad rectifier could fry the stator, can a bad stator fry a rectifier?

 

[Faztbullet]

Never seen a stator damage a rectifier but anything possible in electronics. There is no voltages going to stator only outputs..

 

[HcK]

Never seen a stator damage a rectifier but anything possible in electronics. There is no voltages going to stator only outputs..

Ok, what about the process i described as far as checking the stator volts in previous message? Is it accurate?
On second page of thread. . atleast on my end. Last thing

 

[Faztbullet]

You need a DVA adapter to read voltages correctly. I have read you can use a meter set on peak and read this but never tried or trusted this method. If correct from your postings. the rectifier is shot and the stator is suspect with the low voltage reading on browns. I would retest the output from stator(browns) with a adapter.

 

[Vic.S]

You can make a simple DVA
The circuit is here

how to make a DVA adapter for multimeter

Someone (starts with BK and ends with THEKING) responded to a question about how to make a DVA adapter and sent a link to directions. but the link has been moved or deleted it said. Does anyone have those directions.....? I gotta miss in this 81 Johnson V-4 and I gotta find out why.

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