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    1979 OMC 120 Sterndrive runs very hot at low RPM

    Re: 1979 OMC 120 Sterndrive runs very hot at low RPM These 2 pictures show the plate just before installing the swivel housing and after it is bolted together.
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    1979 OMC 120 Sterndrive runs very hot at low RPM

    Re: 1979 OMC 120 Sterndrive runs very hot at low RPM The pictures show the stages of assembly for the water pump. I used sealant per the service manual instructions. I placed the O ring between the impeller plate and the Swivel Housing as in Howard Sterndrive illustration.
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    1979 OMC 120 Sterndrive runs very hot at low RPM

    Re: 1979 OMC 120 Sterndrive runs very hot at low RPM Installed new water pump kit. Still can not get it to pump water. Rigged up test tank out of drum to see if we could get it to work before putting it back on the boat. Powered it with attachment made up for 1/2 drill.I found information on a...
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    1979 OMC 120 Sterndrive runs very hot at low RPM

    Re: 1979 OMC 120 Sterndrive runs very hot at low RPM I have also noticed something about the pump assembly itself. Mine had a large O ring the diameter of the pump case. I am not sure it was in the correct place when I took the pump apart and so now i am confuused as to where it may go. On...
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    1979 OMC 120 Sterndrive runs very hot at low RPM

    I have a 1979 Sea Star with a 2.5 liter OMC 120 engine and 400 series Stern drive. The engine is GMC inline 4 cylinder. Model number of engine is 990243S. I worked on the boat over the winter and started putting it in the water this spring for the first time. The boat is new to me, never saw it...
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