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    Mercruiser 470 3.8 LT. 4 CYC. OVERHEATING

    I posted this question once before and got several things to check out. All suggestions where greatly appreiciated---BUT--- nothing helped. Heres what has been done so far-- 1. New Impellor[intake in out drive] 2. New 4 inch Heat Exchanger 3. New Thermostat 4. New gauge and sending Unit 5. Head...
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    1978 Mercrusier 470 2 bbl. carb. OVERHEATING--PLEASE HELP!!!

    We have replaced the thermostst,4" Heatexchanger,gauage,sending unit, impellor and housing in lower unit,plugs,checked compression [All cyclinders 150+],engine has salt water cooling system--it has been flushed in both directions,fresh water cooling system has been flushed in both...
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