Power Unit ID?

here is the only tag on the unit.

that would be a good guess.... Look at that MAG... WOW !...   a golden oldie..

Edited by steve(ill) - 20 Apr 2025 at 8:21am

i just took a tall wd45 head off a wd that had a mag like that,      thats the first one iever seen like that.  i think the tractor whent to scrap last saturday

Off to a good start! It has excellent hot spark.

From 1929 to 1936 the U, UC and M engine had a 300 cubic inch displacement. Midway through 1936 the bore was increased from 4 and 3/8 to 4 and 1/2 making it a 318 cubic inch displacement. The hp rating was not retested. I have a 37 UC and a 37 U. If you hook that motor up to a sawmill and make it work hard it really does have a unique sound. Years ago I bought a power unit that ran an irrigation pump from OK tractor in Oklahoma, it even had the low oil pressure shut down switch on it and a twin disc clutch, electric start. That motor went into the 37 UC that I still have. Believe it or not they made the UC version of the transmission and engine up until 1954 for the Thompson conversions. The rear shroud supports looks nothing like the U power unit in Norms book on page 193. Makes me think your unit may have been built later on in line with the Thompson conversion line. Just a thought. Post a video if you get it on the mill working.
Leon B Mo

Edited by Leon B MO - 20 Apr 2025 at 7:42pm