Rectifier on 1994 40hp, 4 cyl, 2 stoke Mercury Tracker

[grbeasley]

I have identified the rectifier on my engine and bought a replacement part based on the part number printed on the old part. When I went to replace the part, I unplugged each wire and plugged in the new wire before moving to the next wire insuring that I had the new part plugged in exactly as before. When I got to the last red wire, I found the old wire was already plugged into a new wire. In other words, the two red wires were simply plugged together. I found this hard to believe, but went ahead and did that. The motor cranks, but there is still no difference in the electrical output back to the battery. Could this be a quick fix from a prior problem? I bought this motor used and it has never charged the battery, as it should.

Thanks for all input.

 

[racerone]

Testing the stator would be the next step.----Or was that done before you decided the rectifier was indeed bad ??

 

[grbeasley]

Have not done that. A mechanic told me the rectifier needed replacing and I could see a burned out area in there. If the stator is bad, would the motor run at all?

 

[grbeasley]

Problem solved. Upon study of wiring schematics, I determined the wiring was incorrect and was bypassing the charging circuit. Unplugged a couple red wires and connected the reds from the rectifier in their place. Getting about 14.5 volts at battery now when running.