Whatever you do, DON'T SPIN THE CRANK. Each cylinder of that engine is nearly as big as an ENTIRE VW Beetle engine!! If it kicks backward and you are pushing down, you will break your arm for sure. The impulse coupling is what provides a hot spark, by spinning the magneto just after the piston goes over TDC. AND BE SURE YOU SET that impulse if it is a manual type. If you don't, the engine will fire before TDC and you will get a kickback (if you are pulling up, you probably won't get hurt if you don't have your face down near the crank and if you don't keep your arm in a position so the crank can come around and hit it). Originally, this tractor had a manually-operated impulse, but I think that in the 30s, IHC put on magnetos with automatic impulse couplings. Many of the oldtimers had their mags replaced by either later types (like an F-4, which was an easy adaptation, or something made by another company, like Fairbanks-Morse or Bosch). The later mags might have automatic impulses. If you can't see the impulse coupling, you can hear it "clink, clink" as the pawl drops into the notch in the drive coupling. If you don't hear the clinking sound as you are beginning the upward pull, stop and find out why there is no sound. The pawl needs a little lubrication to work well. It can also stick if it hasn't been used in a long time.
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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