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    Mariner 85hp 1977, dies when under load and throttle above 25%

    Hi Crew, My Mariner 85hp 1977 was running great till it overheated at low revs. I replaced the water pump but it now will not throttle up when in the water and in gear. We were slowly motoring out of the marina, i tried to get going faster and then the motor started to die. I dropped the...
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    How do i check Mercury thunderbolt 850 cooling system?

    Hello Boaters! When running this engine with hose attached, warm water only comes out of the vents at the bottom of the leg not the small hole on the rear right of the power head, or the two ports at the lower back part of the power head. Is this a problem? What should i look for? I have never...
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