60° looper has no cylinder head gaskets?

Home Forum Ask A Member 60° looper has no cylinder head gaskets?

This topic contains 4 replies, has 3 voices, and was last updated by Avatar fleetwin 1 month ago.

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    johnyrude200
    US Member - 2 Years
    Replies: 749
    Topics: 171
    #166596

    I just realized that these motors do not use head gaskets, rather gasket maker is put around the water orifices on the cylinder side. How do the cylinders create compression? Is it the flexible sleeve mated to the cylinder head which sets up the compression?

    bobw
    bobw
    US Member - 1 Year
    Replies: 391
    Topics: 19
    #166598

    The 60 degree motors use a large O-ring instead of a head gasket to seal the cylinders. Not sure how OMC came up with that idea but it works. I pulled the heads on my 1998 Evinrude a few years ago to look into an overheat problem and the factory O-rings were still in good shape. I did replace them with new ones.

    Bob

    1954 Johnson CD-11
    1958 Johnson QD-19
    1972 Evinrude 25202

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    johnyrude200
    US Member - 2 Years
    Replies: 749
    Topics: 171
    #166623

    Are these big o-rings just outside of the sleeves? I did notice this rubber but wasn’t sure if it was part of the sleeve.

    Thanks

    bobw
    bobw
    US Member - 1 Year
    Replies: 391
    Topics: 19
    #166647

    Not sure which ’97 model you have but on my ’98 Evinrude 115hp the O-rings were a separate piece. It’s been awhile since I worked on that motor but I don’t remember a sleeve.

    Bob

    1954 Johnson CD-11
    1958 Johnson QD-19
    1972 Evinrude 25202

    Avatar
    fleetwin
    US Member - 2 Years
    Replies: 2511
    Topics: 29
    #166656

    Yes, the orings are laid into a groove on the block, perhaps they are compressed to the point where they just look like part of the block…
    And yes, the cylinder orings should be replaced every time the heads are removed. Use the sealer prescribed in the manual to avoid corrosion issues….

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