Charging and tach issue. Voltage rectifier upgrade to 35amp?

Bman2895

Petty Officer 2nd Class
Joined
Feb 11, 2016
Messages
195
So my outboard is a 1978 Johnson 140. Came with the smaller standard rectifier. Well in my figuring out the tach issue I found my rectifier basically exploded. I swapped on one from my buddies 90 and it did fix the tach, but when running I didnt see much if any charging voltage?
And if I wanted could I toss on a 35amp rectifier?I will just buy the same part and replace if not, But I do have the a 35amp rectifier from a 1984 parts 140 in the garage. The kind that bolts to the top of the block. Can I just swap it on with my current stator? Is it possible it would work, but just not put out the full the 35amp output? I saw one other post of someone having done this and said it worked for them but I wanted to ask if anyone else had done it.
 

Chris1956

Honorary Supreme Mariner
Joined
Mar 25, 2004
Messages
29,163
You can buy a new rectifier for a few dollars that has much more capacity then the OEM one. i.e. you can get a 25A rectifier that the engine cannot fry. Take a look on Amazon for such an item.
 
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