ONAN voltage regulator for 720

Looking for replacement voltage regulator and converter to replace OEM equipment on 720. anyone found a suitable replacement ???   

Thanks Steeve

Edited by Macon Rounds - 11 Jan 2016 at 7:28pm

Thanks Steve.    Anyone else have voltage regulator/ rectifyer replacement for these ONAN motors ???

Yep: thats what i have understand.   That is why i am looking for a replacement !!!!

Unfortunately i do not have the output voltage information on those engine electrical systems. However that is exactly what i am hoping to fine here with you good fellows.  Something comparable to the output of my system which is 25 VAC at idle and 49 VAC at full throttle.  Plenty of voltage regulators and rectifyers out there to choose from, unfortunately they seldome list the input voltage and current they are rated for.  That's were you fellas come in.....    HELP !!!!!  Thanks in ADVANCE . 

Edited by Macon Rounds - 12 Jan 2016 at 4:07pm

http://casecoltingersoll.com/#/forumsite/21290
Try the case ingersoll forum I don't post over there but I have read alot of their posts and they have an entire section dedicated to these motors as they where used in the old case ingersoll mowers. I bet they can set you up with the parts you need.

Curious, how may wire leads are coming from the stator, and what are their colors.

http://www.casegardentractorparts.com/c3voresibo.html
I don't know if that is the right part or not but I have bought parts from those guys before and they are good have shipped me quality parts at a reasonable price before.

Thanks

Looking for verification on that.  Have bought several CCKB engines were folks hooked up incorrect voltage regulators, stator looks like melted goop or worse yet sweels and knocks off a magnet which james into flywheel and causes all kinds of damage.  Worse case is it brakes the flywheel and chews up the crank.  Yep seen it happen.  Grrrr !!!   

The information below is the reply and info from CDI tech services........... Their VR is Kinda pricy so I think I will keep searching.

While we do not manufacture a replacement part designed for these
> motors; all
> > the research I could find seems to indicate this system had a 20 amp
> regulator.
> > We do manufacture a 20amp voltage regulator/rectifier for a Mercury
> Marine
> > replacement, part no. 194-5279; list price is $249.16, and it has 5
> wires. the
> > two yellow wires for connecting to the stator, two red wires for
> connecting to
> > starter solenoid ( only one is needed for most applications) second
> red wire is
> > used in some engine applications, and a grey wire for tach
> connection.
> > This might meet your needs. It is approximately two inches square
> and 1/2 inch
> > in depth and has two mount holes.

Brenda at Sandy Lake has the parts available  .....  Regulator and rectifyer are seperate units.... 

The Onan charging system situation is confusing.
I have Simplicity and Onan wiring schematics and they conflict
in wiring, color of wires, number of wires off the stator.
I think they had a 15 amp system and a 20 amp system.
One system had two wires from stator, the other three, I suppose.

Read this link:
http://simpletractors.com/service/onan_electrics.htm
"There are 2 black and 1 red wires coming out of the stator. The 2 black wires are the AC source and the red wire controls the stator output."

So a three wire stator? That would normally be construed to be a three phase stator.
But that red wire controls stator output as he says. Now how does that work?
My guess is that the scheme feeds back into the stator to buck the magnetic flux and reduce the output.  If so, this is real clever (ahead of its time I would say).
So if people are getting their two wire stators crossed up with three wire regulators
and such, I could see stator melt down. Especially if they are forcing a fit- clipping leads and
splicing on new plugs.  My lawnmower man says the most common way to melt a stator is to mis-wire 12v to the stator coil. And that can make the stator grow and contact the magnets.

I still think if the stator is really a 2 wire, then a regulator such as off the JD318 would work.

I think the system they had as described in the link above is trouble from day two because it
is too whacky different from what the industry (Kohler and B+S) repair people were used to and they got their parts mixed up and had a meltdown. The Onan engines after the CCKB had simple two wire stators as far as I know.
If I were going to get the parts from Onanparts.com, I would get the stator, rectifier and regulator- matched set. Now you are at  100's of dollars. However, if the wiring on the machine has been goobered, new parts won't work. And since in my experience there are two many wiring schematics out there, how ya going to figure it out. I didn't see a phone number at Onanparts.com, so good luck.