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  1. M

    Cant remove bottom of pump housing from the Lower Unit.

    I have a 1976 50hp #2629264. I reoved the lower unit to replace the impeller and decided to try and remove the entire pump to see how things work. When I got to the lower pump housing I could not budge it. I tried a piece of wood and a mallet nect to the exhaust port and gently but firmly...
  2. M

    Sand in lower unit !!!!!

    So I pulled the lower unit off my 1969 Mercury 500 and I have discovered sand everywhere,except the pump and impeller I think. My last cruise I bottomed out and messed up my prop. Could this be why there is sand in it?? Also where is the best place to get the right parts? I have been using...
  3. M

    When changing water impeller do I HAVE to drain the lower unit??

    I have a 1969 50hp mercury. I want to go through the water pump and change the impeller. Do I have to drain the lower unit, I have just changed it out and see no reason to do so. Thanks for the help!!
  4. M

    Cant get to the carb! I want to rebuild it.

    I have a 1969 mercury 500, serial #2629264. I have discovered that it is a dual carb buried under the rest of the components for the engine. I have removed the starter the bracket that is at the front of the engine and moved the components attached to the bracket to the side. I have only the...
  5. M

    1969 mercury 500 harness and linkage removal ????

    Hey guys I want to pull the motor from my bout to bring it indoors for the winter. I am most likely being over cautious. I have a Mercury service manual but the pic are not so good. I See that there is a spring type thing around the harness where it attaches to the head of the motor. Do I...
  6. M

    Filling Lower Unit Prob???

    Hey everyone. I have a question about filling my lower unit, its a 1969 mercury 500 # 2629264. I opened both the Vent screw and the Fill Screw. Screwed in the filler tube from the container of oil and pumped the pump. I think some oil got into the unit but not sure. Isnt the oil supposed to...
  7. M

    Gurgling noise from engine!????

    Hey eveyone I am new to the forum and the boat world. I have a question about my out board. It is a 1969 Mercury 500 Kiekhaefer #2629264. I have taken the boat out several times and need help with a diagnosis. At first start I squeeze the primer bulb but the last time I did this there seemed...
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