Bad battery or bad wiring, maybe both?

[thegipper]

Is everyone as stumped as me?

The only thing I'm not understanding is the reading I'm getting from the red rectifier wire is double the reading I'm getting from the yellow wires, is that a deviation from the "reading". I've read the rectifier instructions like 6 times now. I'm getting readings in one direction and none where I reverse it but the red wire reading is like 1400 compared to the 690 from the yellow wires.

Does that mean my 6 week old rectifier is bad?

 

[gm280]

To properly test your rectifier, you need to disconnect all the wires and then use you meter in the resistance scale to test it. And you should get a high resistance reading with the meter lead one direction, and a very low reading when you swap the meter leads. If that is what you get between the terminal then your rectifier is good. If not your rectifier is bad.

I tried to look up your rectifier and I find one that looks like a circular container with three wires coming out of it. Two of those wires are yellow, The other is blue or another color depending where I see it listed. However, I am assuming that the container is somehow grounded to the engine. Otherwise I don't see how it could possibly work. Is that how yours is set up? Post picture for us to see your rectifier and I will try to walk you through you problem. JMHO

 

[thegipper]

No Title

Here you go gm280, thanks for helping btw.

The replacement rectifier has two yellow wires, one red and one black (ground). The old rectifier (original one) had one yellow, one yellow grey and a red wire. The body of the rrectifier was the ground.

 

[thegipper]

I got the replacement rectifier on amazon and it said it was for the exact same part number as the omc number for this motor.

I am getting high reading in one direction and nothing when i reverse it. The only thing I am unsure of is the reading on the red wire measures 1400 when the yellows both read 690.

The red number is just much higher than the two yellow readings. They still only give me readings in one direction and none in the other like they are supposed to. Hope tthat makes sense

 

[thegipper]

Your never going to believe this! I hooked it all back up and it's charging !

the only thing Idid different was flip the two yellow wires on the terminal block. As Iwould rev it up, the voltage at the battery went up. Battery was showing 13.22V and climbing as i revved it higher!

from eeverything I've read it shouldn't matter but it does for this rectifier.

the blocking diode is still shot in the control so it wont turn off. I ordered a NOS one.

thanks everyone!

 

[Decker83]

Glad to see you got it working. I just bought a CDI rectifier from I-boats. It came with the 2 yellow wires and red and a black ground. The instructions said I may have to flip the two yellow wires if it didn't charge right.. Said they don't use the yellow gray wire anymore only the yellow wires.
I have the rude 70 hp 1974 engine.

 

[thegipper]

Mine came with no instructions at all! That really grinds my gears, plus I've read on here and elsewhere it shouldn't matter. Well clearly on some rectifiers/motors it does matter.

I'm thrilled it isn't the stator because they are hard to come by and not cheap.

Hopefully my blocking diode will be here soon (coming from Canada). I cannot believe my luck so far with this motor....LOL

 

[thegipper]

Just want to add that I did get the replacement blocking diode for the control. My engine now shuts off again when you turn the key off.

Hopefully this will be the last time I have to come on here because my motor is messed up.

Thanks again