sealing a cork carb float.

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  • todd281
    todd281


    Replies: 77
    Topics: 36
    #202303

    I am working on a Neptune Mighty Mite motor and need to replace the bad carburetor float. I purchased a solid cork of the approximate size, shaped and drilled and have it ready to install. I have tried sealing with different types of products but alas not good results.

    So far I have tried Instant glue[ albeit from the dollar store] let it dry for 24 hrs, only to submerge it and have it peal away. So do I need to switch to a “name brand glue” or perhaps let it cure?

    Then I went to the air hobby store and bought Fuel proof Polyurathane for models. paintet it on , wait 24hrs, place in the gas and flaked off in 6 hrs. so now i have a bottle of that stuff in storage.

    Next I tried different types of Loctite , blue ,red, green, again no success.

    I have some red head shelack gasket sealer hear but from what I have read that will not work for ethanol treated gas.

    I see some people used gas tank sealant or “por 15 paint with some success but I am hoping for a “use this stuff and it will work suggestion”

    I would change the float to high density foam if i could find a place that sells the fuel proof type used in more moderen type carbs.

    I thought about making one out of hollow brass and solder but I do not think my soldering skills[ or eyesight] would be up for that challenge.

    So any ideas/ suggestions that have WORKED in the past Thanks in advance

    oldemtr
    oldemtr

    US Member - 1 Year
    Replies: 73
    Topics: 9
    #202322

    This is the stuff that most people say works well :

    SIG SUPERCOAT FUEL PROOF DOPE-CLEAR

    outboardnut
    outboardnut

    US Member - 2 Years
    Replies: 694
    Topics: 461
    #202330

    following

    Tubs
    Tubs

    US Member - 1 Year
    Replies: 3070
    Topics: 169
    #202331

    3 users thanked author for this post.
    squierka39
    squierka39

    US Member - 2 Years
    Replies: 587
    Topics: 31
    #202334

    Tubs, nice test. That was going to be my suggestion, leave it unposted it’s will float.

    frankr
    frankr


    Replies: 5234
    Topics: 48
    #202335

    todd, how much $ did you spend on all those potions? For about $6 you could have bought a Sierra 18-7208 (for Mercury) Nitrophyl float. You can cut, sand, drill, modify it as necessary, no sealing needed.

    Sierra-float

    • This reply was modified 3 months ago by frankrfrankr.
    • This reply was modified 3 months ago by frankrfrankr.
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    outboardnut
    outboardnut

    US Member - 2 Years
    Replies: 694
    Topics: 461
    #202348

    For what its worth
    I googled Nitrophyl Float
    and came up with this
    I could not find dimensions
    I never tried to modifying Nitrophyl Float
    https://www.jmesales.com/krueger-sentry-nitrophyl-float/?gclid=CjwKCAjw4871BRAjEiwAbxXi2zJr5oz2JDVNwZLpDw-Ex1gE0IPueceZQ8OoIXTWC2mBEfQKynh2-xoCZlYQAvD_BwE

    Avatar
    amuller

    US Member - 2 Years
    Replies: 948
    Topics: 153
    #202367

    I’ve been sealing my floats with POR-15, which I think is a polyurethane. But am not sure that leaving them bare might not be safer. I’ve seen foam floats get saturated, but not recently. Brass floats would be my preference but not easy to fabricate.

    labrador-guy
    labrador-guy

    US Member - 2 Years
    Replies: 379
    Topics: 39
    #202370

    Tubs, what do you think causes the float to look like an old prune after a few years?

    todd281
    todd281


    Replies: 77
    Topics: 36
    #202403

    Wow thanks for all the replies . Tubs your experiment speaks for itself, It makes me wonder why, if the cork did not need the coating ,why the OME ones had a coating [and replacements still do] I cant believe they would do that for no reason ,, hmmmm. Frank thanks for the part # I searched and searched but could not come up with one that I thought would work.You are a wealth of knowledge. I will check it out and most likely get one of the mercury floats. I have a few $s invested some of those chemicals some were left overs from other projects. Almost all of the research I have done so far has come up with some replies that are positive and some negative I hate to do anything twice so I was hoping for a hands down ,” use this stuff ” or a ID on what is on the replacement cork floats of today.

    Tubs
    Tubs

    US Member - 1 Year
    Replies: 3070
    Topics: 169
    #202442

    So then the question is why were cork floats coated.
    I use to coat floats as well. Then Sometime ago a
    member named Jim stated that years ago the reason
    cork floats were coated was to keep fungus or bacteria
    from grow on them. I was aware that fungus or bacteria
    is an issue in fuel oil so hence my experiment. I can only
    speculate that the additives in gasoline today have
    eliminated the problem. Jim got quit a bit of kick back
    with his opinion and didn’t attempt to defend his position
    so I won’t give his last name but it turns out he is the smart
    guy. I’m just trying to see if he really knew what he was
    talking about.
    As far as why a cork float fails a cork is not a cork and
    possibly it was unknowing replace with a cheap facsimile.

    https://www.widgetco.com/wine-corks?utm_source=bing&utm_medium=cpc&utm_campaign=CORK%3A%20CORKS%3A%20Wine%20Cork%20(%2425)&utm_term=wine%20corks&utm_content=Wine%20Corks

    Tubs
    Tubs

    US Member - 1 Year
    Replies: 3070
    Topics: 169
    #202443

    .

    • This reply was modified 3 months ago by seakaye12seakaye12.
    • This reply was modified 3 months ago by TubsTubs.
    Tubs
    Tubs

    US Member - 1 Year
    Replies: 3070
    Topics: 169
    #202444

    .

    • This reply was modified 3 months ago by TubsTubs.
    • This reply was modified 3 months ago by TubsTubs.
    Tubs
    Tubs

    US Member - 1 Year
    Replies: 3070
    Topics: 169
    #202445

    .

    • This reply was modified 3 months ago by seakaye12seakaye12.
    • This reply was modified 3 months ago by TubsTubs.
    Tubs
    Tubs

    US Member - 1 Year
    Replies: 3070
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    #202448

    .

    • This reply was modified 3 months ago by TubsTubs.
    • This reply was modified 3 months ago by TubsTubs.
    • This reply was modified 3 months ago by TubsTubs.
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