Re: Tillotson Carb Question

[frankr]

One sucking while the other is blowing is one way of putting it….That is the charge is merely being passed back and forth between upper and lower crankcase chambers.

A couple of other ideas–has it ever been severely overheated? Could be the piston skirts are trashed but still have compression. Has it been apart? Did they put the pistons back in the right way (slopes in right direction)? Main bearing seals could be severely leaking?