Bob, That's why they (the Indmar Technicians) don't tell you to run an entire tank of fuel at WOT. There is a happy medium when "polishing" (glazing)the cylinders. They need to reach a consistent polish so that the rings seat. The engine does not need to be run until white hot (like a race car) for this to happen. If you do not open it up at all during the first 10 to 100 hours, your rings will collect coke and will not expand to seat within the cylinders. This problem has occurred within some of the GM marinized motors and to combat this GM has come out with a product that is poured into the cylinders to dissolve the deposits, then removed to assist in ring seating. Several Techs have said this is mostly done on marine engines that have been babied too much during break in. I wish I could add a link too! Just call the 1-800 number for Indmar.
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