1973 135 hp johnson stator problem

[speadboater93]

when i went to start my motor up the battery was dead. It turned out that that i left my radio on. So then i got a new battery and started it up. it fired up and ran good for about 3 minutes and just stopped dead. I popped the flywheel off and the coils were cracked and melted,there was plastic all over the flywheel. So why did m primaty coils swell up. and is it possible to only buy the two primary coils instead of the whole stator.

I would be grateful for any help

thank you in advance

 

[F_R]

Re: 1973 135 hp johnson stator problem

Not that I know of, used ones maybe. But I fail to see any link between that and the dead battery situation. The two coils only charge the power pack and have nothing to do with the battery. There's something we aren't seeing here.

 

[speadboater93]

Re: 1973 135 hp johnson stator problem

well i have a new power pack so thats not an issue. If any one could tell me how to test my rectifier and the two coils that would help alot. I did a simple ohms test and i got current through only one coil. But i still need to know how to do a real test to know for sure if the coils are bad and if the rectifer is. another question is, could the rectifier make the coils swell up.

thanks agian.

 

[HighTrim]

Re: 1973 135 hp johnson stator problem

Welcome to iboats!

To test the rectifier.....

Place meter in Hi ohms position

1. Disconnect rectifier lead from terminal block. Connect one ohmmeter lead to either yellow or yellow grey rectifier lead, and other meter lead to ground. Note reading

2. Reverse leads, and note reading. Infinite or very high reading in both checks indicates diode open. zero reading in both checks indicates diode is shorted. Normal diode will show a reading in one direction and no reading in other.

3. Repeat with other rectifier yellow lead.

4. Repeat test, connect meter between rectifier yellow lead and rect red/purple lead. Between yellow/gray stripe rectifier lead and rect red/purple lead.

 

[ccnstlr]

Re: 1973 135 hp johnson stator problem

If there is melted plastics or swolen and cracked coils on the stator, then you should replace it. There should be 4 leads leaving the stator, the yellow and yellow/gray are the alternator circuit and the brown and brown/yellow are the charge coil circuit. You should get about 500 ohms across the charge coil circuit and they should not be shorted to ground.

You could look here and run some of the tests
"http://www.boatpartstore.com/page30.asp"

 

[speadboater93]

Re: 1973 135 hp johnson stator problem

All i need is one more peice of info. It appear to me that my alternator coils are fine. Do you guys think that if the alternator is not hooked up and there is a bad rectifier could that heat up thoose little coils and make the big two swell up and get smeared on the flwheel.

If not what else do you think could of made the two coils swell up.

 

[speadboater93]

Re: 1973 135 hp johnson stator problem

I found a wirring diagram and it turns out the red wire from the rectifier was not hook up to any thing. Could this make the little coils heat thus heating up the two big coils.

 

[speadboater93]

Re: 1973 135 hp johnson stator problem

someone please help me. just tell me if the red lead on the rectifier not being hooked up to anything could make the coils heat up.

Any more help and I would be extremly gratefull

thannks again