Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
The transmissions are separate with the exception of the oil reservoir, so I assume the oil level is correct. That only leaves changing the oil and filter , to see if it makes any difference. Everything else is internal to the transmission.
I see question is stil open, did you see my response?