“O” ring sub number

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    drifter

    US Member - 1 Year
    Replies: 150
    Topics: 97
    #191687

    Is there a common “O” ring number for the upper drive shaft “O” ring used on many of the 50’s OMC outboards. P/N 0303347 prices seem ridiculous.

    olcah
    olcah

    US Member - 1 Year
    Replies: 414
    Topics: 82
    #191688

    O ring size.

    This might help.

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    crosbyman

    Canada Member - 1 Year
    Replies: 1602
    Topics: 196
    #191743

    oring chart

    Oring-chart-o-ring-

    Joining AOMCI has priviledges πŸ™‚

    • This reply was modified 6 months, 3 weeks ago by MumblesMumbles.
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    lindy46
    lindy46

    US Member - 1 Year
    Replies: 336
    Topics: 24
    #192106

    I bought an o-ring assortment from Harbor Freight and can usually find one that fits.

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    crosbyman

    Canada Member - 1 Year
    Replies: 1602
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    #192125

    GLM 81110 matches the size maybe a local seal/bearing shop can order it …. might be cheaper

    Joining AOMCI has priviledges πŸ™‚

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    outbdnut2

    US Member - 2 Years
    Replies: 1276
    Topics: 67
    #192128

    I also find these in my Harbor Freight assortment.

    https://www.harborfreight.com/382-piece-o-ring-assortment-67554.html

    Dave

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    garry-in-michigan

    Lifetime Member
    Replies: 3566
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    #192147

    This is what Sierra Marine has . . .

    bobw
    bobw

    US Member - 1 Year
    Replies: 1064
    Topics: 41
    #192151

    I’ve used these size charts by finding the appropriate OEM number, verifying the correct dimensions as shown in the chart, then finding the matching size at my local Ace Hardware store where they have drawers full of O-rings.

    Bob

    1954 Johnson CD-11
    1956 Johnson RD-18
    1958 Johnson QD-19
    1959 Johnson QD-20
    1957 Evinrude Fastwin 18

    "Every 20 minute job is only a broken bolt away from a 3-day project."

    outboardnut
    outboardnut

    US Member - 2 Years
    Replies: 694
    Topics: 461
    #192235

    But don’t we have to careful in regards to what kind of materiel the O ring is made of?
    Aren’t some O-rings made for water and others are for oil?

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