Welcome Guest - Sign Up today
Welcome Guest - Sign Up today
Store Links Mobile - Shop Now



Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.

Below are some additional forum policies in hopes of all iboats members will follow, Thank you.

1. Please do not reply to old topics or hijack existing topics. Old topics of a technical nature are like a library book, Please do not write in them.

2. Old topics should be considered archives and used for reference only. Please do not reply to them.

3. Do not take over someone else’s topic (aka hijack) with your own question, even if it is similar. If you have a question that has not been covered to your satisfaction in the archives, it is always best to start a new topic of your own.

4. If you have a question for the original poster (OP) and the topic is over 30 days old, send the OP a PM, he may not even visit the forums any longer, or may not notice your question in the old topic.

5. By starting your own topic, you will receive the maximum number of views by forum helpers that may not even notice your question when it’s posted at the end of someone else’s topic. And those answers will be specific to your particular issue.

6. Please do not post to topics that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any topic that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old topic.

7. Posting at the end of any topic is considered to be hijacking the original posters topic which in turn subjects the topic to be closed if it continues to happen thus not making it fair to the original poster in the future had for some reason he/she needed to return for additional information or provide an update of the problem solved which is always welcomed within a reasonable amount of time frame.

8. Please note that you should see a red banner pop up near the bottom of each inactive topic asking you not to reply to old topics. The Red banner will read: Please note this topic has been inactive for 90 days. For the best results, please start a new topic.

Thank you all in advance for doing your part in helping iboats run a smooth ship.

Additional forum rules linked below.
See more
See less

Nissan NS5B Internal Gas Tank Threads Stripped OFF!!?!!

  • Filter
  • Time
  • Show
Clear All
new posts

  • Nissan NS5B Internal Gas Tank Threads Stripped OFF!!?!!

    The tank threads are stripped and the cap won't seal. I understand this is a common problem. Anyone fixed this without buying a new tank? Can you use epoxy and the cap as a die to make new threads? Add an insert? Looking for ideas.

  • #2
    New Tank.
    Buffalo NY USA


    • #3
      2 Other Cheap Alternatives.-

      There's a flexible putty compound, comes in a 2 color strip, the one that needs to be twisted to mix well while strip color changes. When fully mixed wrap a very thin ring onto tank's neck, shape & compact with fingers till putty adheres well.

      As plastic is smooth, will be a good idea to sand, abrade tank´s neck adequately previously for putty to hold well onto neck.

      With finger dampen oil to the internal cap's threads contour, gently bolt cap back till seats nicely and forms a new neck thread, don't over tight cap or will pull putty off neck. Remove cap from tank, let dry putty till next day. Putty must be flexible during the thread formation procedure, if hardened no way...

      Get a cork that fits inside tank's neck, drill a small middle hole, insert a thin 3/4" or 1" cannula/metal or plastic tube into cork to let air in and don't spill fuel out when OB is in operation, will be able to use the tank but not seal air vent, could get a second cork to close tank when out of operation. Will work ok if OB is not removed from transom and layed down...

      Or buy a new internal fuel tank...

      Happy Boating
      Sea Rider 320, 380 Sibs, 450 Rib, 2 Strokes Tohatsu 5,18 & 30 HP Proud Smokers


      • #4
        369703164M FUEL TANK 5 HP INTERNAL $74.52
        /*USE CAP 393700206M*/
        Buffalo NY USA


        • #5
          Thanks everybody - gonna try the epoxy putty an if that doesn't work will get new tank. Will report back after I try the putty.


          • #6
            The epoxy putty worked. First attempt was a failure as the epoxy wasn't hard enough. Second time I waited till the epoxy was 2/3 hardened and that did the trick. Cap seals fine.


            • #7
              Sign up today
              Should have pics of what they look like. I have a snowmobile with an oil tank and the cap would slip as if the threads were stripped. I took a copper plumbing cap (I think for 1 1/4 pipe) and cut the end off with a hacksaw. That left a copper ring about 1" tall. That ring just barely fit into the tank opening and supported the threads well enough for the cap to be put on very tightly. It has worked very well for over 5 years.