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    Merc 470 Dies after 40 min of running

    I have a 78 Merc 470 4 cyl 165hp I/O engine that after 30 or 40 minutes of cruising cuts out like it has ran out of fuel. I can start the engine again but only idle for a bit before it cuts out again. Although tank is half full. I have replaced the fuel pump, line, and fuel sender. Cleaned all...
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    Merc 470 sluggish when engine under load

    I have a 78 Mercruiser 470, 3.7L 165Hp 224cubic inch I/O. I am able to go slightly above idle without an issue, problem now is that once I push the throttle down, give it some gas the engine wants to die. This boat sat unused for 6 years, with a gallon or 2 of old gas in it. I diluted my old...
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