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 - Chores - by Frank Young. The ceaseless passing of time! It is at once our friend and our enemy. It measures our progress and it makes us old. Like most features of our life, few things are all good or all bad, and most such judgments depend on our own perspective or viewpoint. In our particular hobby, we enjoy the nostalgic return to the days of our youth as we recreate many of the scenes that took place on the family farm that served as the stage for the first few acts of the play that is our live
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