Cutting grass and got a power drop and funny exhaust sound. Pulled spark plugs and #4 had no pressure. Naturally, I had just filled the gas tank so I had to drain it to get to the valve cover. Then I saw this! Can't find anybody that lists the part except Tisco so I will drop by Larry's tomorrow and get him to order a kit (830703M91) unless one of you knows where I can mail order it. I've never seen a retainer fail like this - have you? The valve looks like it dropped about 3/4 inch and "sounds" like it is not bent when I pop it up to closed position. Anyone know if there is room enough above the piston that it may have actually survived?
Don