I just purchased a used mtd mower 15.5 hp 38"....initially it would only run in reverse when I engaged the pto...in fwd it would stall or backfire. I adjusted the carb and it seems to run just fine. Is it bad to adjust the carb? It seems like its running super strong when I did it. I changed the air filter , plug and I put a gas/ carb cleaner. It runs great when not mowing. Also the deck vibrates a great deal I noticed one of the cotter pins is broken. Any and all help would be greatful. Im brand new regarding ride ons.
I'm not familiar with that model, but you would probably get more responses if you posted in the backyard roundtable section, s that's the area for lawn and garden tractors. This is the section for Compact Utility Tractors (CUT's).