Just to catch up here I've loosened up the clamshell to the rear cylinder connecting rod bearing and the engine now spins fine. The other cylinders rod bearings seem fine so I've left them alone for now.. This rear rod bearing did seem to have plenty of oil on on it so I don't think that is the issue. The bearing is oversized at .020 So I'm wondering if the journal was not machine correctly and the fit is to tight. I'm thinking of adding a .002 shim to ease the fit. Anyone have a suggestion.
