1987 mercury 35hp charging system inop

[bill j]

I just got a 1987 35hp motor and relized its not charging. I am not sure what wires to ohm out coming out from under the stator. what the rectifier or voltage regulator looks like? I am a ASE master tech. I just dont work on this stuff too much. any help is appreciated.

 

[Barnacle_Bill]

Re: 1987 mercury 35hp charging system inop

Rectifier looks like this. And here is how to test it.
1. Disconnect the battery leads.
2. Disconnect all wires on the rectifier.
3. Connect the red test lead to ground and the black lead alternately to terminals A and C.
The meter should show continuity.
4. Connect the black lead to gound and the red lead alternately to terminals A and C.
The meter should not show continuity.
5. Connect the black lead to terminal B and the red lead alternately to terminals A and C.
The meter should show continuity.
6. Connect the red lead to terminal B and the black lead alternately to terminals A and C.
The meter should not show continuity.
7. Replace the rectifier if you do not get correct readings.

 

[CDI Tech Support]

Re: 1987 mercury 35hp charging system inop

I just got a 1987 35hp motor and relized its not charging. I am not sure what wires to ohm out coming out from under the stator.

Thoroughly read this article:

Battery Charging Issues, Regulator-Rectifiers and Tachometers

 

[bill j]

Re: 1987 mercury 35hp charging system inop

should I see some ac voltage on the stator wires when the engine is running above idle? the stator ohms out below 1 ohm and is open to ground. but there is no ac volts.