Original magneto for Farmall Regular?

We are restoring a Farmall Regular tractor that has a Bosch magneto on it. Is this original for a 1929 model?

for a '29 model regular i think it should have an ihc e4a magneto.

i believe the E4 is correct for that year.

standard was an E4A IHC magneto. as an option you could get either a Bosch ZU-4 or FU-4 magneto

Luke R,
Hope you post some photos of your Regular.


In addition to the guys on this site being an awesome resource...

Here is a link to a website that has a lot of detailed information about Farmall Regulars. I stumbled across this site about a year ago. My husband and I are (slowly) restoring a 1931 Regular. This guy, Harold Sohner, has a great website providing a lot of history, specs, etc. (His father worked at the Farmall Works in Rock Island).

Another great resource is Farmall Regular and F Series Collector's Originality Guide by Oscar H. Will III and Todd Markle. This book is great and we bought it thanks to the advice of some guys here on YT. If you watch on ebay, you can get it at a pretty reasonable price. I think we paid less than $17 dollars for a new book.
Farmall Regular website Harolds Tractor

The magneto we have is a MJB4A-106.

Great website on the Regular.

Note in the specs that the early model tested at Nebraska had a 1" carburetor and put out about 13 hp on the drawbar. Later models had a 1.25" carb. I spent a lot of time on F-20s and a '29 Regular back in the 40s and I really don't think there was much difference in their power. I expect the larger venturi accounts for the extra power. Early IHC ads made a point of emphasizing the "extra power" of the F-20 (I think they claimed "about 15%," but I haven't seen one of these ads in years). Still, I am pretty sure they were comparing the 20 with the very early Farmall. Good advertising, but I suspect they knew what they were doing.

Another little factoid. Early IHC ads for the F-20 refer to the "original Farmall." In one place, I remember seeing "the regular Farmall," which was not really a name but a way of distinguishing the two tractors. I believe the unofficial name "Regular" came from the difficulty of telling the Farmall and the F-20 apart at a distance (unless you had very sharp eyes and could spot the exhaust pipe coming out the top on the F-20, as well as the different steering gear). I have actually heard someone ask "Is that an F-20 or just a regular Farmall." Everyone understood that "regular" meant "the original model." I can't prove what I am stating here. It's just an opinion from an old geezer who lived and breathed these beasts for ten years or so way back then.