Farmall A magneto cutoff switch choke mechanism

Posted by Butch Heilig on March 17, 2004 at 12:44:18 from (66.37.68.167):

I've got what I believe to be a 1939 Farmall A with a 1951 vintage (casting date code 220W) engine on it. The data plate is missing, so I'm piecing together clues to come up with this info.

The magneto has a small assembly on the outside of it that rotates counterclockwise about 15 degrees to break the contact and kill the spark. There is no mechanism attached to this to allow me to operate it from the seat position, but there are some little guide flanges (one under the gas tank, one on the side of the block) which appear to have been guides for some kind of a mechanism.

Does anyone know anything about this magneto feature? Someone at Red Power's board said it was a feature of the 1939 model year magnetos.

Also, should I be able to operate the choke from the seat position? The tractor doesn't have a starter on it, so on one hand it would make sense if it didn't. But on the other hand, it would be nice to be able to actuate the choke without dismounting.

There's no casting date code on the bell housing, so I'm told that this also might indicate an early 1939 build tractor (agian, from the Red Power board). Anyone know??

Thanks!

Butch Heilig
Newport (not News), VA

Follow Ups:

• Re: Farmall A magneto cutoff switch choke mechani Paul in Mich 16:41:32 03/17/04 (0)
• Re: Farmall A magneto cutoff switch choke mechani gene b 16:08:48 03/17/04 (0)
• Re: Farmall A magneto cutoff switch choke mechani Dave BN 14:34:11 03/17/04 (1)
  • Re: Re: Farmall A magneto cutoff switch choke mec Butch 19:37:04 03/17/04 (0)

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