Identify an old prop and 2cyl crankshaft

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  • Beno


    Replies: 68
    Topics: 23
    #243406

    Im in the box of boat parts again!

    Not.indentifying marks on either of these pieces. A prop and a crankshaft… anyone know?

    IMG_20210721_153240_DRO

    Attachments:

    Beno


    Replies: 68
    Topics: 23
    #243416

    IMG_20210721_153711_DRO

    IMG_20210721_153751_DRO

    IMG_20210721_153801_DRO

    Attachments:

    Beno


    Replies: 68
    Topics: 23
    #243421

    IMG_20210721_153711_DRO-1

    IMG_20210721_153751_DRO-1

    IMG_20210721_153801_DRO-1

    Attachments:

    JOHN HOLBIK


    Replies: 135
    Topics: 2
    #243428

    The prop looks like from a OMC 10 or 15hp.What is the pitch and diameter.


    billw

    US Member - 2 Years
    Replies: 1526
    Topics: 45
    #243434

    I’m thinking the prop might be from a 3 hp OMC and I’m pretty sure the crank is from a 15 hp, 18 hp or 22 cubic inch 25 hp OMC. I wish I could be more specific than that; but that’s all I got…..

    Long live American manufacturing!


    frankr

    US Member - 1 Year
    Replies: 5790
    Topics: 49
    #243437

    I immediately said JW-10 prop, but that ain’t right. Hub is wrong. Now I’m thinking a McCulloch/Sears.
    Agreed, the crank probably is a 22 cu/in OMC.


    frankr

    US Member - 1 Year
    Replies: 5790
    Topics: 49
    #243438

    7.5hp McCulloch prop

    7.5-mcculloch

    Attachments:

    outbdnut2

    US Member - 2 Years
    Replies: 1574
    Topics: 81
    #243443

    What is the inside diameter of the hole in the hub for the prop shaft? I’m thinkin’ early to mid 1950s small OMC – maybe 7-1/2 HP?
    Dave


    outboardnut

    US Member - 2 Years
    Replies: 773
    Topics: 343
    #243447

    Frank your amazing!


    modhydro

    US Member - 2 Years
    Replies: 27
    Topics: 22
    #243448

    The crank sure looks like what I use in the 22ci pre 1976 omc engines. Is it for sale? Thanks

    Steve


    Beno


    Replies: 68
    Topics: 23
    #243451

    inside diameter on the prop bolthole is 1/2″

    outer diameter prop is 5.5″

    WhatsApp-Image-2021-07-22-at-17.36.5ddd3ss-1
    WhatsApp-Image-2021-0ddd7-22-at-17.36.54
    WhatsApp-Image-2021-07-22-at-17.36.5dd3
    WhatsApp-Image-2021-07-22-at-17.36.53-2

    Attachments:

    Beno


    Replies: 68
    Topics: 23
    #243457

    Steve, I plan to list it when I figure out the part number. but I have no way to know if it’s good.. maybe I should just micrometer the journals?

    • This reply was modified 6 days, 14 hours ago by Beno.
    • This reply was modified 6 days, 14 hours ago by Beno.

    billw

    US Member - 2 Years
    Replies: 1526
    Topics: 45
    #243468

    If there are no rust pits, it’s good. Looks like it may be shot where the top seal goes? Other than that, I wish I owned it! As for the prop, I didn’t catch that it was right hand until later. OMCs are left hand. Oops.

    Long live American manufacturing!


    Beno


    Replies: 68
    Topics: 23
    #243473

    Looks like frankR has the prop pretty well locked down to being a 7.5hp McCulloch prop.. i would NEVER have known that. Now that i know the basic info i see others online for sale…

    I’ll get some better pics of the top journal crankshaft tomorrow

    20210722_235533

    • This reply was modified 6 days, 8 hours ago by Beno.
    • This reply was modified 6 days, 8 hours ago by Beno.
    • This reply was modified 6 days, 8 hours ago by Beno.
    Attachments:

    The Boat House


    Replies: 3458
    Topics: 86
    #243484

    Frank your amazing!

    He impresses me as well.

    You're only as smart as the person you're talking to.

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