Hi All, this engine is on a pressure washer, originally ran out of oil, refilled with clean oil, ran fine for quite awhile until it stopped again, drained oil which was grey in color, when I tried to restart it just seemed to spin freely, I disassembled it, piston and rings seem fine at least good enough that there would seem to be some compressor, any thoughts as to where to look, also it would assume that there should be to be sure the timing is correct if i reassemble it.
See score mark on cylcinder, is this factory?
Lack of lubrication failure. Basically in simple terms. The cylinder got hot enough to melt the aluminum causing scoring and galling of the cylinder and piston. The area to the left of your circled area and the area on the bottom of the cylinder opposite of the circled area is also damage
