WICO XH1042 magneto

kb9r

New User
I have a 1935 B with a WICO XH1042 magneto. This is probably not the original magneto. I think that may have been a Fairbanks & Morse DRV2B?

My question is this: Does this tractor and this WICO magneto have a short or long ear assembly?

Currently the tractor runs, but starts hard. I rebuilt the carb (drilled passages, etc) and now am thinking of going through the mag. Any suggestions or info would be appreciated.

This is a family tractor but I don't have any memory of Dad changing the mag. Tractor's serial# is 53**.

Joe in Wisconsin

cvphoto5438.jpg


cvphoto5440.jpg
 
Well I would for sure clean up the mag. It might just need the points cleaned. Just moisture can corrode them and you wont get a good hot spark. That will make the tractor start hard. If you are getting good fuel then the next place to look is the mag.
 
Joe, That's a beautiful tractor you have there. My 37 started hard too, but I had a WICO C on it. Friend of mine got me a rebuilt WICO X, swapped it out and wow, started up on the first rollover. The X appears to be a good mag, not sure if it is historically correct, but it works good. I don't know if it is short or long lugs, but I could find out. I would keep the X just make sure it is in tip top condition. Mine does NOT like choke and I set the throttle at a little past idle. Starts great.
 
According to information in the Field Service Bulletins, the early "B's" used long-lug impulse drives (S/N 1000 through 89999). The change to short lugs began at S/N 90000. And yes, the original magneto on your "B" would have been a Fairbanks-Morse DRV2B.
 
Thanks for all the info guys! Well, I just need to pull my mag and measure the lugs I guess. I couldn't remember if they were long or short. The reason I asked, is I was under the impression that the XH1042 was a short lug mag built after 1940. Maybe they made them both ways or the lug piece is interchangeable?
Dan, maybe I need to see what years are associated with those serial numbers you mentioned.
Teddy, what long lug mag do you have? Maybe you could tell me your serial number range?
Ron & Bob & amtrac, thanks for those comments and advice! All good info!
Thanks again,

Joe
 
Have you already cleaned and/or replaced points, etc.? No need to remove the mag to do all that. Once you take it off you'll need to get it timed properly when you reinstall it. Not that it's that difficult, but no sense making extra work for yourself if you don't need to.
 
The XH1042 isn't necessarily locked into a short lug impulse drive cup. Drive cups between C and X magnetos are interchangeable. The WICO C was first used on the Model "H" when it was launched in 1939, and was then used on all of the flange-mounted Waterloo tractors until the better-designed WICO X was available sometime around 1947 or 1948. The C and then the X became the appropriate "repair parts" as time went on. Deere told dealers that they didn't have to stock all the various unique assemblies of magnetos but could stock a few magnetos along with the appropriate impulse drive cups to swap as required to suit the application. The picture is from Field Service Bulletin 159-S, January 1948, soon after the X was introduced, and take a look in the table at note #3.

cvphoto5473.jpg
 
Dan,
Thank you! Now that answers my initial question! I appreciate your efforts along with others to help me!

Joe
 
Rich,
Yes, I'm probably thinking to deep. Before I rebuild the entire mag, I will look at the cap, rotor, points & condenser.
Good advice!

Joe
 
Geeeeeeee Dan you do good work. Somewhere in all the info my late friend Duane Larson left us all I had that information but didn't take the time to dig it up lol

John T
 
I felt very privileged to have known Duane through a few face-to-face conversations as well as a number of emails. He was always glad to share the immense amount of information he accumulated, and he was a professional - he didn't make up stuff, he always documented his sources. Unfortunately, he left us far too early. And he was a true gentleman. I never heard him make any derogatory statement about anyone.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top