[johnneilson]

pat,

If it is truly that hard to turn, something is too tight.
It sounds like the crank is set correctly, this leaves just a few things to consider.
Check the rods to make sure the radius on crank is not causing the tight condition, rings are gapped properly. Assembly lube is pretty thick, I prefer to use 90wt gear oil when test fitting parts, I find it easier to feel the fit and when final assembly, I use the thicker assembly lube.

Even though these might be different, the basics still apply, slightly modified "B" motor.

John

PS, I have witnessed another condition that can cause issue, check to make sure the rods are not bent. With the width of the bearing, the straightness of the rod can cause binding.