1953 Martin 20 Gas Tank

Home Forum Ask A Member 1953 Martin 20 Gas Tank

Currently, there are 0 users and 1 guest visiting this topic.
Viewing 14 posts - 1 through 14 (of 14 total)

  • Buccaneer

    US Member - 1 Year
    Replies: 5195
    Topics: 840
    #236922

    Anyone ever take the “two piece” Martin 20 gas tank apart?
    It has machine screws around the bottom perimeter, and on the top side, inner perimeter.

    It’s aluminum, so no rust of course, but it was thick was old dried gas crud and a bunch of rubber stuff inside.
    I’m not sure what the factory sealed the seams with, or if it was really meant to come apart again.

    I shook it with acetone and screws inside off and on for two days, and it was better, but not near good enough
    to run the motor. My last attempt was a muriatic acid dilution, which didn’t do a whole lot other than make the
    upper seam start leaking after a few minutes. The acid was reacting with something, as the tank started getting
    a little warm. I thought best not to leave the acid in too long, so I washed it out with lots of water.

    DSCN0618

    Prepare to be boarded!

    Attachments:

    jcrigan

    US Member - 2 Years
    Replies: 199
    Topics: 16
    #236961

    I have taken a few Martin 40’s apart. It’s best to do this as that sealer will eventually flake off and plug things up. You can make your own gaskets or order them from the Martin guy. If you make your own, use seal-all or some other sealant to coat the new gaskets.


    Buccaneer

    US Member - 1 Year
    Replies: 5195
    Topics: 840
    #236962

    Sealer isn’t a good option anyway, unless I can get it super clean inside…….
    or course if I can get it apart, I can get it clean.

    Did you have to use heat on the seams to get the tank halves to release?
    Whatever sealer oozed out of the original seam appears to be “hard as rock”.
    Thanks.

    Prepare to be boarded!


    jcrigan

    US Member - 2 Years
    Replies: 199
    Topics: 16
    #237079

    I had a Martin 45 that had the red stuff in there. It was on the outside of the seam in addition to the inside. Add to that it was also in the tube, shutoff valve, and carburetor bowl. It wasn’t glued together very tight as I think the previous owner never took the tank apart. The red suff is very rubbery and i had to pull the two halves apart like it was a giant rubber band.


    Buccaneer

    US Member - 1 Year
    Replies: 5195
    Topics: 840
    #237099

    I tried heating the seams up with a bottle torch and then using a plastic hammer
    to separate the halves, but got nowhere!
    I think I’ll go back to cleaning the insides of that tank some how, then slosh
    a little sealer inside to reseal the seams.

    I see on YouTube where people have made a “shaker” using a washing machine
    transmission to shake things all about, but my wife said “No”!

    Prepare to be boarded!


    frankr

    US Member - 1 Year
    Replies: 5919
    Topics: 49
    #237101

    I took mine apart and found ton of gunk inside, as you have. I can’t see a slosh sealer working with all that crud from the original seal in there.
    Upon advice of another member on this forum, I resealed it with an aircraft tank sealer, figuring if it was good enough for airplanes, it must be good enough for an outboard. He was right, it worked great.

    I’ll have to search and find the info for the product. Be back inn a few………

    • This reply was modified 7 months, 1 week ago by frankr.

    frankr

    US Member - 1 Year
    Replies: 5919
    Topics: 49
    #237103

    This is the stuff and the place, but you certainly don’t need such a big jug of it. I’ll leave it up to you to do the legwork to find it in smaller packaging, At the time, I bought a 2 oz cartridge, which was just right for my Martin tank.

    https://www.aircraftspruce.com/catalog/pnpages/09-38560.php?msclkid=5666a6e808011e08ee7bc66ec8d8975e&utm_source=bing&utm_medium=cpc&utm_campaign=TNT%20-%20Shopping%20-%20NB%20-%20Desktop&utm_term=4580977758706259&utm_content=All%20Products


    Buccaneer

    US Member - 1 Year
    Replies: 5195
    Topics: 840
    #237155

    Frank, I’m sure that tank sealer is great stuff, but not sure it’s going to be worth the money for
    this little Martin, and I have POR15 and Kreem in my supply cabinet. I’ve used Kreem twice
    now, and kind of like that.

    Maybe I’ll have to try harder to get the tank apart. If I continue with the torch to heat the seams
    up “Ted” will go up in a puff of smoke.

    I checked the compression at 75 psi before I tore the motor apart, so thought I was good
    to go. I was disappointed today when I could not get it to rope start, using a temporary fuel tank.
    Finally got the drill out and couldn’t get it to run for more than a few seconds in the test tank.
    Finally took it out of the water and it did stay running, but of course, I couldn’t run it long enough
    to ever try adjusting the carb.
    I’ll probably recheck compression tomorrow.

    Looks like a Martin 20 Racer!
    DSCN0765

    Prepare to be boarded!

    Attachments:

    chevy55belair


    Replies: 2
    Topics: 1
    #247914

    ….I just picked up a Martin 20….I am getting ready to take it apart to restore the paint job. I have been reading about the issue of the gas tanks leaking. So I am curious if anyone has come up with the solution of splitting the gas tank….for reseal…prior to assembly ???

    Thank you…. Steve….Bowling Green Ohio


    Buccaneer

    US Member - 1 Year
    Replies: 5195
    Topics: 840
    #247916

    I have hopes to make a “gas tank shaker” so I can thoroughly clean
    the insides of my Martin tank (and others) so I can get it clean enough,
    and just put gas tank sealer in it, so I don’t have to worry about destroying
    the tank to get it apart.
    I always save the “gas tanks” as the last item to address when going
    through outboards…….. they’re no fun, lol.

    Prepare to be boarded!


    need2fish

    US Member - 2 Years
    Replies: 229
    Topics: 13
    #247947

    You can buy a sealer kit for motorcycles — it has an acid cleaner (phosphoric, I think) and slosh-to-cover sealer.


    chevy55belair


    Replies: 2
    Topics: 1
    #247948

    ….Thank you sir…..


    The Boat House


    Replies: 3619
    Topics: 91
    #247951


    If you use a sealer the tank still must be clean before you
    etch it and then add the sealer. When done properly
    they work well. I have used both Kreem and Red Coat
    but search YouTube for gas tank sealers failure.

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


    Buccaneer

    US Member - 1 Year
    Replies: 5195
    Topics: 840
    #247954

    I was wondering how this design would work for shaking the beejesus out
    of a gas tank….. of course, it would have to be tweeked to mount different
    gas tanks instead of a paint can.

    paint-shaker-mechanism2

    Prepare to be boarded!

    Attachments:
Viewing 14 posts - 1 through 14 (of 14 total)
  • You must be logged in to reply to this topic.