quote Richard A. White:
I think you might find that the location of the knob is placed where it is to assist in balancing the rotating unit. Place that hole in the wrong place the flywheel could wobble to the point of destroying the crankshaft
.
good thinking, but…
It’s a very low-speed engine , so can it do harm when you use it the whole day ?
probably yes, but an hour on the lake for fun…..
finding one with a perfect upper bearing is rare, they are worn out always, so….
🙁