Charging system gremlins :(

[Streffpilot]

Ok. So this is for the motor in my signature.
New Cdi stator
New Mallory rectifier
New tach
System only producing 12.24 volts, same as battery. Also no tach signal. Wired directly to stator wire.

I checked all connectors, seem to be making good contact. I'm at my wits end, any suggestions, no matter how far off the wall are appreciated!!!!

 

[MH Hawker]

Re: Charging system gremlins

What is the stator out put voltage it should be a AC voltage.

 

[Chris1956]

Re: Charging system gremlins

That system will not produce too much voltage at idle. If you rev it up to 1000RPM you should see a volt or two increase.

Is the brown tach wire connected to one of the yellow stator wires? Does that rectifier have only three posts. If it had 4 posts, the -DC post needs to be grounded.

 

[Streffpilot]

Re: Charging system gremlins

Ok. So. Tach is wired to stator. The rectifier, brand new, only has three posts, and is grounded through its base, with two screws.

The 12.24 was at an estimated 11-1300 rpm.

Today, measured voltage at the stator wires. .98v yes, .98. From either wire. So. Tonight I'll take the stator off and look for any issues.... But it was BRAND NEW so idk what I'll find. What should I look for????

 

[schematic]

Re: Charging system gremlins

Did you measure from wire to wire or wire to ground? Did you have your meter in a/c mode?

 

[Streffpilot]

Re: Charging system gremlins

Wire to ground. On AC voltage.

 

[schematic]

Re: Charging system gremlins

Wire to ground. On AC voltage.

check from wire to wire with rectifier disconnected. should be 15v a/c or higher depending on rpm

 

[Streffpilot]

Re: Charging system gremlins

Ok. So 0.6 v from wire to wire with rectifier disconnected. Is there any way I could look for damage? Or just try to return it from where I got it???

 

[schematic]

Re: Charging system gremlins

have you checked the resistance between these two wires using an ohmmeter? (engine off)

 

[MH Hawker]

Re: Charging system gremlins

I do believe you have found the problem it wont do much if their is no voltage.

 

[Streffpilot]

Re: Charging system gremlins

ok, so an update.

I just sent the stator back to CDI to see if they can determine if it is functioning or not (I suspect not).

So hopefully, by the end of the week, I will know if that stator was any good at all. I hope it is bad, because I can't think of anything else to try.

So that leads me to my question: Is it possible for the magnets in the flywheel to go bad? or reverse polarity? or something screwey like that?

I tried to test each of the magnets in the flywheel by seeing if they would attract a bolt. All did. Maybe polarity is reversed on some of them, but how to test?

I don't know what else could be the problem.

ANY ideas, no matter how far off the wall it sounds is appreciated.

Streffpilot

 

[Chris1956]

Re: Charging system gremlins

I never heard of magnets changing polarity. OMC used to "recharge" permanent magnets, or at least they had the ability to do that. I never heard of anyone who needed to do that though.

All your magnets are intact? Your outer flywheel is installed properly? Is that a distributor ign motor?

 

[Streffpilot]

Re: Charging system gremlins

Ok.......so CDI dude says the stator is good :/

So.....my question is: does the base of the stator (where it is bolted to the engine block) need to be grounded good??? My thought is that maybe since it was a new stator, the bolts didn't wear down the paint enough to create a good ground, making it so that it didn't have polarity or something???

Yes, all magnets are present, and in tack. Mounted right. All magnets attract a bolt very strong.

My thought is the grounding issue.

This is a distributor model if that makes any difference.

 

[MH Hawker]

Re: Charging system gremlins

I dont think its grounded, but i can say for sure if their is no AC voltage out put its bad, period. IF their is no output then their is nothing to change into DC to charge with.

 

[Streffpilot]

Re: Charging system gremlins

I'm thinking I may try another flywheel off of eBay. Idk. I just can't think of anything else to try.

Dude from cdi says stator is good. But when I had it on my engine I got NOTHING!?!?!?!?

So. My thoughts are making sure the stator is grounded well through the mounting bolts and a new flywheel.

Thoughts????

 

[schematic]

Re: Charging system gremlins

I doubt a flywheel will make the difference.

-did you have the flywheel on when testing for voltage?
-are you sure you had meter in a/c volts mode?
-did you check for resistance between the stator leads as previously asked?

 

[Streffpilot]

Re: Charging system gremlins

Yes, flywheel was on, ac mode activated, all normal. .4 ohms or so. This is in spec.

Volt meter picked up .99 volts
New tach picks up nothing.

 

[MH Hawker]

Re: Charging system gremlins

Their should be 2 wires coming off of the stator. With those wires unhooked from the rectifier and hooked to a volt meter, with the volt meter set to Ac volts. With the motor running at idle or slightly higher. You should be getting a voltage reading. I am not sure exactly what it should be but at least 12 plus volts depending on the RPMS, Its a pass or fail situation. If their is no voltage then the stator is bad, its that simple. It dosnt matter what the CDI guy says.

When I was trouble shooting mine last year I believe I had 16 volts at a idle, my rectifier had went bad.

 

[schematic]

Re: Charging system gremlins

are you cranking or running when doing the a/c voltage test? Engine must be cranking or running. If so.....ditto MH

(i just find .9 volts hard to believe on a a/c test with a non-open circuit stator)

 

[ncfloyd]

Re: Charging system gremlins

Hello, i have a 86 force 125 which is basically the same with the charging. stator should ohm out around .5. With stator disconnected from rectifier and motor running you should get 13-20 volts at idle. Mine is 18. If it doesn't match this then the stator is bad and you should tell them to shove it up their ***. Also remember to get all the correct parts. ie I bought a rectifier from radio shack and it looks the same but definitely is NOT the same.