Roger10378 wrote:
Another problem with small engines is that the valve seats wear enough that the valves don't seat anymore. Did you check the gap before you disassembled? If not you need to reassemble enough to check. If there is not enough gap between the valve and lifter you will have to grind enough off the valve stem to get the right gap. I don't know the spec for your engine but it is usually in the .005-.010 inch area.
YES, this is the main culprit when you have low compression on these small engines.
Jay D.
