1925 Elto carburetor

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    hotrod


    Replies: 119
    Topics: 7
    #6430

    When this 1925 Elto model C is at rest, there is a small but very strong spring and a polished metal ball sitting on the air valve. The ball is free to move up and down through the center of the small spring. This small spring is also free to move up and down in the cover. It appears from the wear mark that the valve has been hitting the cover. The springs purpose may have been as a stop for the valve, but what is the purpose of the ball. The 2nd picture shows where the strong spring and ball are located in the cover.

    Tubs
    Tubs

    US Member - 1 Year
    Replies: 2803
    Topics: 161
    #53641

    I’m in the middle of doing one of these
    and there isn’t a check ball in mine. This
    is the only Rudder Twin I have ever had
    but most of my motors have poppet
    valves and none have had a check ball.
    So either mine is missing or yours shouldn’t
    be there. I believe the small Dia. spring
    should be secure in the cap, not free to
    move up and down.

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    garry-in-michigan

    Lifetime Member
    Replies: 3544
    Topics: 31
    #53646

    This is the first time I have seen the inside of one of those VERY antique carburetors. Are they much different from Ole’s Row Boat Motors? . . . 😐

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    bob-d

    US Member - 1 Year
    Replies: 323
    Topics: 68
    #53655

    Tubs, how did you clean the carb parts?
    They look brand new!

    RICHARD A. WHITE
    RICHARD A. WHITE

    US Member - 2 Years
    Replies: 1731
    Topics: 132
    #53656

    This is the first time I have seen the inside of one of those VERY antique carburetors. Are they much different from Ole’s Row Boat Motors? . . . 😐

    Other than the materials the design is nearly identical, the old RBM’s are made from bronze and the Elto’s from aluminum…for the most part all of them that I have ever seen.

    I am not sure on the Model K RBM if it has an aluminum mixer or bronze…

    Richard

    http://www.richardsoutboardtools.com
    classicomctools@gmail.com

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    hotrod


    Replies: 119
    Topics: 7
    #53657

    The Model K Evinrude RBM has an aluminum mixer.

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    jimross


    Replies: 16
    Topics: 2
    #53675

    By Jim Ross AOMCI. I believe what you have is a original "C" carb. with a homemade valve cap as the cap that is on it was never used. Thru the "C & "D"
    it had a hex cap with a ratchet and adjustable lever on top with which you could adj the valve "lift". That was the last single poppet carb and the "G" the following year had a 2 poppet carb with crossing slots in it to tighten. Some one has attempted to convert to the later style. If you send me your e-mail I can send a pix. I also can furnish the parts to complete your carb as the body hasn’t been altered. If you send a e-mail address can send you a pix <sogentiiiky@gmail.com>. Or call 1-731-584-2195.

    Tubs
    Tubs

    US Member - 1 Year
    Replies: 2803
    Topics: 161
    #53677

    I’m not a all knowledgeable in these
    and have only have this one model but
    my cap appears to be the same as HotRod’s

    Tubs
    Tubs

    US Member - 1 Year
    Replies: 2803
    Topics: 161
    #53683

    Looking through my picture files and my
    Old Outboard book it would seem that "C"
    motors with earlier serial numbers would have
    the hex cap with a ratchet and adjustable
    lever on top. Also the Old Outboard book
    doesn’t list "C" serial numbers past 20999.

    RICHARD A. WHITE
    RICHARD A. WHITE

    US Member - 2 Years
    Replies: 1731
    Topics: 132
    #53684
    quote Tubs:

    Looking through my picture files and my
    Old Outboard book it would seem that "C"
    motors with earlier serial numbers would have
    the hex cap with a ratchet and adjustable
    lever on top. Also the Old Outboard book
    doesn’t list "C" serial numbers past 20999.

    That is a typo, should extend to 29,999. Mine is serial # 23336

    And mine is like yours Tubs

    http://www.richardsoutboardtools.com
    classicomctools@gmail.com

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    jimross


    Replies: 16
    Topics: 2
    #53685

    OK, I do remember having a "D" with this type of top but it did have the small spring rivited thru the top. An Early Elto parts book does list a complete carb change at SN 20,000 and a part change at SN 20200 and the description of parts match up so this must be it . But no mention of the ball bearing."C" &"D" SN’s run from 12000-30000. Jim Ross.

    Tubs
    Tubs

    US Member - 1 Year
    Replies: 2803
    Topics: 161
    #53686

    And mine is like yours Tubs[/color][/size][/quote]

    quote Richard A. White:

    quote Tubs:

    That is a typo, should extend to 29,999. Mine is serial # 23336

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    hotrod


    Replies: 119
    Topics: 7
    #53696

    After this discussion, I’ve decided to remove the metal ball since it apparently doesn’t belong in there. Also, if the cover is removed while on the motor, the ball will drop out – ending up inside the carb and then inside the powerhead. Thanks all.

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    garry-in-michigan

    Lifetime Member
    Replies: 3544
    Topics: 31
    #53720

    29,999 for 1925 makes sense since 1926 starts with 30,000. At that time Johnson had built 30,560 outboards. . . 😉

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    wbeaton

    Canada Member - 1 Year
    Replies: 761
    Topics: 79
    #53723

    This discussion answers a few of the questions I had. One question still outstanding is in regard to the lever on top of the early model C carb. Is there a procedure for the initial setting of the lever and where it should bottom out? I started to dismantle mine before I realized how it worked. Now I don’t know where the initial setting should be.

    Wayne
    Upper Canada Chapter

    uccaomci.com

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