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How to make a vented gas cap?

Discussion in 'Chainsaw' started by Snap, Nov 15, 2019.

  1. Snap

    Snap ArboristSite Operative

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    I just tried Seal All to mount a couple duckbills in the gas cap. Thanks for that. I think the Seal All held but the duckbills started leaking after a couple of tanks of gas. Maybe I should not mount the duckbills directly in the cap as someone else suggested installing a pen housing to extend outward to remotely mount the duckbill. Thios think is kicking my butt and I have quite a collection of ruined gas caps.
     
  2. Snap

    Snap ArboristSite Operative

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    No, it's definitely a venting issue. Installed a couple duckbills in the gas cap and it made it through a couple tanks of gas without issue.......then the vents leaked gas so atleast the issue was defined.
     
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  3. mkinslow

    mkinslow ArboristSite Guru

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    Ok

    Sent from my SM-G892A using Tapatalk
     
  4. Snap

    Snap ArboristSite Operative

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    I have read an old thread about a vented gas cap for a 346XP, part number 503 82 80-04. Does anyone know if it or another vented cap might fit the 335XPT?
     
  5. aokpops

    aokpops Addicted to ArboristSite

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  6. aokpops

    aokpops Addicted to ArboristSite

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    Fixed a few fuel vents with this stuff
     
  7. Snap

    Snap ArboristSite Operative

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    Have some on the shelf. So many sealants and gasket makers are oil and gas "resistant" but not intended to be constantly wetted. Always been a point of contention with me. I've tried everything on motorcycle petcocks and there seems to be no such thing as fuel "proof".

    Please elaborate on "fixed".
     
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  8. Snap

    Snap ArboristSite Operative

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    What about using JB Weld? Anyone ever use that on plastic in a gasoline wetted application?
     
  9. John Stryker

    John Stryker ArboristSite Lurker

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    Yes, I have used it successfully on a split seam on the bottom of a plastic gas tank. Give it overnight to cure.
     
  10. aokpops

    aokpops Addicted to ArboristSite

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    Used it on a fuel vent on a chainsaw . When putting in the fuel vent I put a very small amount of 1194 around the outside some what like a gasket . So far fixed 2 this way. Long term I don't know
     

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