Sounds like a problem in older wet sleeve engines called hydraulisis. The sleeves actually strech and contract when the cylinder is in the Power Stroke. When expanded on the rod thrust side the sleeve pushes coolent away, when it contracts it causes a void and air bubbles form on the sleeve. When the power stroke occurs again the air bubbles explode working simular to a water jet cutter. Anyone who has ever rebuilt wet sleeve engines has seen this pitting on one side of sleeves. Todays modern engines now support the sleeve midway down rather than the bottom to reduce this problem. O ring deteriation is a result of movement of the sleeve base grinding sediment between the block gland, O ring, and the sleeve. This lower sleeve movment could also cause the top sleeve gland to crack on some engines. Coolent filters and chemical treatments were developed to reduce this phenom.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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