May have a problem. The 361525R1 carburetors were not out to long before IH decided to change them to R92 specs. There was supposed to be enough change over kits sent to dealers to change all tractors sold with R91 carburetors to R92 sizes. Guess all didn't get changed though as once in a while a original R91 showes up. R91 carbs didn't use a high speed adjusting screw originaly, a special plug screwed in where the packing nut goes. Jet was supposed to be sized to work with no adjustment. Carburetor change over kits changed the jet and other mettering parts and added the highspeed adjusting screw. Don't have a original R91 carb to check at this time but I wrote the jet size as .051 for R91. R92 size as .048. Hope this doesn't confuse more than help. found some NOS carburetor change over kits for 400 tractors. Never found any for the 300. Think 300 kits did have a passage plug though, so maybe its changed and not marked.
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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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