Rectifier Wiring

[dasimpleman7]

I have a 1978 evinrude 115 and a friend removed the rectifier and i do not know where the 3 wires connect on the terminal strip on the side of the motor any help would be greatly appreciated. Or a picture of the side of the engine.

 

[Joe Reeves]

Re: Rectifier Wiring

There are 2 yellow wires leading from the stator under the flywheel to 2 terminals of the terminal strip, usually terminal 1 & 2. The 2 yellow wires of the rectifier connect to those stator yellow wires..... 1 to terminal 1, the other to terminal 2.

There is one red wire on the terminal strip that has 12 volts being applied to it constantly. The red wire of the rectifer connects to that red wire.

 

[dasimpleman7]

Re: Rectifier Wiring

thanx a million man, had an issue with no charge going to the battery. Im thinking that the battery was hooked up backwards at some time. The stator looks almost new but i do not know how to test it. I did test the rectifier as instructed by many online forums, by testing the resistance to ground on all 3 leads and then reversing the test, i had a reading both ways so from what i read that means its fried. Ordered a new one but i didnt take it off so didnt know how to wire it back on. Again thanx

 

[dasimpleman7]

Re: Rectifier Wiring

one more question does it matter which yellow from the rectifier hooks to which yellow on the terminal block from the stator?

 

[Vic.S]

Re: Rectifier Wiring

Yellow wires are interchangeable but may have a another colour tracer. Connect like with like if they do but it really does not matter.

If the battery was connected with reverse polarity the rectifier would have been destroyed quicker than possible to disconnect it.

You can test the stator for continuity, that's about all but when running you should be able to measure an AC voltage between the yellows. Will rise with revs to well above 12 volts ... probably higher than you'll expect.

 

[dasimpleman7]

Re: Rectifier Wiring

"You can test the stator for continuity, that's about all but when running you should be able to measure an AC voltage between the yellows. Will rise with revs to well above 12 volts ... probably higher than you'll expect."

Thanx for the input, how would i go about checking the stator for AC voltage? Im asuming i would set my meter to AC then red to one yellow and black to the other yellow. Is this correct? Or do i need to go to ground? Or was you refering to testing the rectifier for ac voltage? From what i have read the stator produces ac voltage wich the rectifer then turns to dc and regulates the charge. Is this correct?

 

[Randyg123]

Re: Rectifier Wiring

"You can test the stator for continuity, that's about all but when running you should be able to measure an AC voltage between the yellows. Will rise with revs to well above 12 volts ... probably higher than you'll expect."

Thanx for the input, how would i go about checking the stator for AC voltage? Im asuming i would set my meter to AC then red to one yellow and black to the other yellow. Is this correct? Or do i need to go to ground? Or was you refering to testing the rectifier for ac voltage? From what i have read the stator produces ac voltage wich the rectifer then turns to dc and regulates the charge. Is this correct?

Yes measure AC voltage across the two yellow wires coming off the stator Red lead of your meter on one yellow wire and the Black lead of your meter on the other yellow wire coming off the stator.

The rectifier converts the voltage to DC. Search "bridge rectifier" on the internet or wikipedia to get a description of what happens. A regulator is a different thing altogether. A regulator regulates (bad choice of words) um... it controls the voltage within a narrow range. So it may keep the output voltage of the rectifier between say 12.6 and 12.8 volts at all times. This is not the case for your engine as the output voltage is not regulated. 'Regulator' and 'Rectifier' are often used in place of each other but they are different.

 

[dasimpleman7]

Re: Rectifier Wiring

thanx to everybody that has responded to this post, i have learned so much about the charging system of this motor and gained some valueble testing of these components. Again thanx a million to everybody that responded.