Just purchased JD 420 lawn and garden. Wondering why the B series Onan has solid motor mount. The tractor really vibrates. I know alot of them do , but I was curious if the 420's w/ this motor all do this. Also, this carb does not seem to have a fuel adjustment. It misses a little when choke is off , but if you pull it 3/8 of the way out it smooths out. When you turn the idle down to slow , then you can turn choke off. Please tell me how to adjust fuel flow. Or does it just need cleaned. Thanks
