The 20 hp Onan has problems with intake valve seats. So far 2 machine shops have had to decline to install new seats in it. (One refused to even look at it, The other on inspection, determined the block wouldn't fit in their machine.
I was just wondering if anyone re-powered one of these old Wheel Horses (1991) and if so, what engine did you use? And What problems, if any did you encounter?
I really want to hear from someone who actually did the job or had it done.