Quote:
Originally Posted by imagine2frolic
What did you do about the surface of the cylinders themselves? Did you hone themm to get rid of any glaze?........i2f
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Yes. The reason for the re-ring was cylinder glaze and frozen rings. The engine, with only 70 hours on it from the previous owner, sat for 6 years and the rings had never really seated. The Yanmar tech guys thought the long sit in one position probably caused the problem. I carefully protected any grinding debris from falling onto the crank and used a 3 stone hone to break the glaze and cross-hatch. It did a really nice job. Of course w/ only 70 hours there was NO ridge. Yanmar recommends a ball hone but I have always used a stone hone and like them better. I was able to use a large mirror in the bilge to see the lower end to loosen and later re-torque the rod journals. Ran her all this last summer with no excessive oil use or any
exhaust smoke. Before this she was burning a quart in an eight hour run!