I goy a YS from a fellow RC'er here on RCU and upon receiving the engine and pulling the rocker cover I have found that one of the pushrods does not rotate when I turn the crank. The rockers are not frozen and if I depress the rocker away from the pushrod end and turn her over the pushrod still does not move. The engine also does not have any compression whatsoever. I would like to sort this out if it would be of little cost to get this engine running but the seller is also willing to refund my purchase price. Any opinions would be appreciated. He also said that he had "modified" the rocker cover to act sort of like an air chamber.

Thanks

Loopman []