1984 evinrude 70 hp charging problems

[58070chevyguy]

Have a 1984 evinrude 70hp on a pontoon I just bought. New to boats and 2 strokes so I have been doing a lot of research and fixing this thing myself. When I first purchased boat power pack was bad so I replaced that, rebuilt carbs changed plugs, and cleaned every electrical connection and coated with dielectric grease. This is when I noticed rectifier had positive wire almost corroded in half. Bought new one of eBay and now this thing gets so hot you can't touch it and with a fluke meter at battery connections I get 12.8 volts which is slightly more than when motor is not running, rpm has no effect on voltage output. Some of the other posts I have seen mention tach mine does not work should I start there can I bypass and see if it charges. I don't have a book yet been looking on eBay for a factory service one I was told to stay away from clymers. Any help is greatly appreciated .

 

[LongLine]

I suspect you have the wrong or a bad rectifier. Did you do the ohm/volt test on it?

Tom B.
(LongLine)

 

[58070chevyguy]

I called the company to verify that I got the correct rectifier because the listing said just about every model and year but mine it is a Sierra 18-5708 it replaces omc 582399 and 583408 it's 3 wire. I bought the clymer manual download and it said ohm the two yellow wires that get ac voltage from stator to ground and then reverse should be infinity one way and a resistance value the other I got Mohms one way and Kohms the other I checked my ground which I thought was good and restarted motor I am now getting little over 13 volts and it does respond to rpm changes but the rectifier is still getting to hot to touch

 

[jakedaawg]

Rectifiers do get hot, to hot to touch. However they should not be burning the insulation off the wires.