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  1. #1
    Petty Officer 1st Class
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    Default Winterizing a 1981 omc 3.8 and omc stringer 800

    I have a new to me boat that I need to winterize. I need to find the locations of all the drain points. I have only ever owned mercruisers. Anything special with the omc I should know about. I downloaded the manual in the adults only section, but it was very vague about locations.

    This is in a 1981 sea ray v197.
    Any help would be great. Thanks

    image.jpg

    1989 suncruiser 24 ft pontoon. 1979 johnson 70hp 3 cylinder

  2. #2
    Rear Admiral Howard Sterndrive's Avatar
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    Default Re: Winterizing a 1981 omc 3.8 and omc stringer 800

    there's 4 drains (+1 more if you have power steering)

    1 on each manifold
    one on each side of the block, just astern of the selectrim mounts- the starboard side between the fuel pump and starter is the toughest to get

    remove the plugs and poke wire in all holes.

    then you can take either end of the u shaped water pump hose off and tip it to drain
    Baba-buoy.

  3. #3
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    Default Re: Winterizing a 1981 omc 3.8 and omc stringer 800

    Thanks. What about the outdrive. Does anybody know where to find the factory service manuals.

    1989 suncruiser 24 ft pontoon. 1979 johnson 70hp 3 cylinder

  4. #4
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    Default Re: Winterizing a 1981 omc 3.8 and omc stringer 800

    Check here on I-Boats first and if no luck try Ken Cook in Milwaukee WI.

  5. #5
    Rear Admiral Howard Sterndrive's Avatar
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    Default Re: Winterizing a 1981 omc 3.8 and omc stringer 800

    Quote Originally Posted by Blujay96 View Post
    What about the outdrive.
    change the gear lube in all 3 compartments
    change the clutch compartment lube
    store the drive in the full down position so water does not run in the prop and crack the impeller housing
    Baba-buoy.

  6. #6
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    Default Re: Winterizing a 1981 omc 3.8 and omc stringer 800

    Thanks guys. I am working on it this week. want to make sure I get all the water out.

    1989 suncruiser 24 ft pontoon. 1979 johnson 70hp 3 cylinder

  7. #7
    Rear Admiral Howard Sterndrive's Avatar
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    Baba-buoy.

  8. #8
    Petty Officer 1st Class
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    Default Re: Winterizing a 1981 omc 3.8 and omc stringer 800

    Okay I was looking over the motor and found a exterior crack in the manifold on the starboard side. Not sure if it would be worth trying to weld or not. I found a used pair for 100 dollars. Haven't been able to look at them yet they are from a 1984 motor. Would they fit

    1989 suncruiser 24 ft pontoon. 1979 johnson 70hp 3 cylinder

  9. #9
    Rear Admiral Howard Sterndrive's Avatar
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    Default Re: Winterizing a 1981 omc 3.8 and omc stringer 800

    1981-1985 3.8's all used the same manifolds.
    Baba-buoy.

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