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winterizing yanmar

  1. flushing/antifreezing 2gm20f

    I have a 1991Yanmar 2gm20f on a 1971 Pearson and am trying to winterize the raw water part. Seloc manual worthless for this. I think I can fill a bucket with freshwater to flush, and then antifreeze mix to stay in by turning engine with intake hose in the bucket. Is this all there is though? How...