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  1. Yanmar 3GMF: Mystery Drop in RPMs

    Fellow Sailors, I am perplexed by a drop in rpms on my old (but well maintained) Hunter. Any advice would be appreciated! I noted a drop in the past year of rpms on the Yanmar 3GMF in my 1985 Hunter 34. After purchasing the boat in 2008 (and during summer 2009 sailing), I noted the engine...