Former Navy here.
Engine runs very good with no unusual noises and oil was filled by the paperwork specs that came with the engine which stated 20 oz. Oil level hasnt changed.
Former Navy here.I wouldn't expect it on a brand new engine,but when assembled,the clearance on the exhaust valve may have been set to tight and the valve is staying slightly open.Does the engine run well with no unusual noises?Is the oil level where it should be?