So a guy asked about this on a 1650 a few days ago and I did what guys were recommending on there and richened up the fuel mixture which helped tremendously but I still dont think its 100% right. I know my manifold is shot but when I first got the tractor Korves didnt have new ones available yet, and finding a good used one was next to impossible. Well now that Korves is repopping them Im going to get new intake and exhaust manifolds coming for this thing to hopefully solve the problem. This does make a question arise for me though, when I rebuilt the motor in this thing I put a 283 kit in it but it still has the original carb. Would it be possible to put a carb off of a 1650 or 1655 on it to match the bigger displacement or were the carbs on the 50/55 any different to begin with?