Are you running in salt water..AND.. Do you have Closed Cooling.?. If you are RAW water cooled running in Salt water..180 temp is too high. Should be 140-160. If you flush after each run in salt..somewhat better. If you are Closed Cooling in Salt ..OR Fresh water there is no problen running at 180.
Avatar: RELIANCE (1903) The Largest single masted sailing yacht ever built (Until 2004)...with over 16,000 square feet of sail. Successful Americas Cup Defender.
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1986 Minx. SBC 350/260hp, Alpha I. Red, Honey.