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Message: <blockquote data-quote="Bobm500Cat" data-source="post: 96320" data-attributes="member: 13757"><p>Sounds like a valve is hung. The same advice applies, remove the heads to inspect so you know whats going on. You may get lucky and remove valve covers. I am not familiar with this engine, but this applies to any engine rust or foreign debris could have come loose and caused a valve to bind. Or since you got ether happy and likely the engine is slightly worn, that ether dissolved oil up into the valve guide and now you have a hung valve. It could break loose with re-lubricating. Worse case, 1 almost full rev means a rod is snapped with the piston holding the rod at the top of the cylinder. Again, This is worse case. Good luck with the repairs.</p></blockquote><p></p>