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  1. #1
    Cadet
    Join Date
    Apr 2005
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    Michigan
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    Default 1980 Mercury 40 4hp 2stroke exhaust holes & water pump

    I have a 1980 Mercury 40 4hp 2stroke outboard motor. It runs fine but I am wondering if water from the pump in the lower unit should be coming out of the 8 small holes that are up higher on either side of the lower unit where the exhaust comes out of? I'm trying to find out if there's suppose to be a "pee hole" or if the water is just expelled from the center of the prop or if these 8 holes are the "pee hole"/exhuast outlet. When I run it at a low speed no water comes out to the 8 holes but when I run it wide open throttle some water lightly sprays out of the holes along with exhaust. Is this all right or should a steady stream be coming out of these 8 holes? I have taken the lower unit apart and the impeller seems fine, the tube is clean and isn't clogged and the motor doesn't seem to overheat at all. I am just more worried that it might over heat if the water pump isnt working correctly. Also, there is no obvious "pee hole" anywhere else on the motor. Any knowledge on this matter is much appreciated.

  2. #2
    Captain
    Join Date
    Oct 2003
    Location
    the third coast, florida
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    3,869

    Default Re: 1980 Mercury 40 4hp 2stroke exhaust holes & water pump

    pee hole: when looking at back of motor( spark plug side) its on the bottom of the lower cowl pan, just around the corner from the back on the rightand yes, you SHOULD have water peing outa there! if not, get a manual and a waterpump kit!

  3. #3
    Cadet
    Join Date
    Apr 2005
    Location
    Michigan
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    2

    Default Re: 1980 Mercury 40 4hp 2stroke exhaust holes & water pump

    Thanks, Looks like I have some work to do...

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