I couldn’t find any casting on the carb but from the research I did the measurement I took certainly appears to be a #26.
Playing devils advocate for a moment: let’s say the original 321aqs blew and the PO threw a 301 or something else he had laying around. What if any problems will arise from putting the larger carb on? I have read some online about people putting the #30 carb on a 12hp and 10hp engines but their motivations were for pulling whereas I’m more concerned about longevity.
Sorry to play the what if game, I’m just trying to decide between parking the tractor until I have time to strip off the tin and identify the engine or if I can just throw on the new carb, tune it and stop worrying about it till a later date.
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