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  • Replace fuel tank or not

    All, I’ve recently acquired a 1990 bayliner 2651. Trailer kept. Needs TLC among other things. ... Problem is these boats have a tendency to have a leaky fuel tank especially at this age. No signs (or smells) of leaking at this point. It had 40 gallons of fuel in her when purchased. That fuel has been removed. What’s the best way to pressure test for leaks? OR do I just take the plunge and start the fuel tank replacement. Not looking forward to it but it may be a necessary evil. Any help would be appreciated.

  • #2
    Seal off fill and vent port, then use a hand pump to ptreesure ize to no more then 5 psi

    The aluminum tank fails from water. If the hull leaks then water gets around the tank, and the water will eat thru the tank. If there is no water, then the tank will last.

    I would check for wet wood near the bottom sides of of the tank. If it is wet, then it needs to be restored.
    94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
    95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
    07 Seadoo GTX
    Merc Adults Only VP Adults Only
    G-Dad always said "First Liar doesn't stand a chance"

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    • #3
      All dodge, thanks for the psi tip. I’ve read that before. Any recommendations on what to seal off with? I’m assuming the 5 psi pressure should not change. Should it remain the same psi for an hour or 2 or longer? With regard to “checking wet wood near bottom sides” , I only have access to the aft side part of the tank that can be visually inspected. Roughly 34” X 7” is exposed. The rest of the tank is under the aft cabin. Only way to check if it’s wet is to cut through the aft cabin floor. If I’m going that far I might as well yank the tank out anyway.

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      • #4
        Remove the vent hose and put a bolt or wood dowel in and clamp off. The fuel fill line, rubber or cork plug, or pvc pipe and plug. Pressure thru fuel connection, and it should hold pressure. If it holds for 15 minutes it should hold longer, just need a good seal

        As for checking wood, if yours is like mine and most others, the bottom of the tank can be reached in front of the motor in the bilge.



        https://forums.iboats.com/forum/boat...som-work/page5
        94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
        95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
        07 Seadoo GTX
        Merc Adults Only VP Adults Only
        G-Dad always said "First Liar doesn't stand a chance"

        Comment


        • #5
          3 psi max
          Over that you could blow the baffles apart.
          Last edited by kcassells; September 8th, 2019, 08:26 AM.
          Most times I'm wrong, Most times I stand corrected..But...Sometimes I'm right.
          1983 SportCraft Deep V OSFF 222 Cuddy Rehab
          https://forums.iboats.com/forum/boat-...ddy-walkaround
          https://forums.iboats.com/forum/engin...-new-fuel-pump
          www.flotationfoamsolutions.com

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          • #6
            Originally posted by kcassells View Post
            3 psi max
            Yes your correct, no more then 3 psi

            But then again, the spec is for a pressure impulse test for tanks larger then 25 gal and no more then 199 gal

            Pressure has no effect on baffle's, same pressure on all sides
            Last edited by AllDodge; September 8th, 2019, 08:32 AM.
            94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
            95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
            07 Seadoo GTX
            Merc Adults Only VP Adults Only
            G-Dad always said "First Liar doesn't stand a chance"

            Comment


            • #7
              Sign up today
              Not worth the debate.
              Most times I'm wrong, Most times I stand corrected..But...Sometimes I'm right.
              1983 SportCraft Deep V OSFF 222 Cuddy Rehab
              https://forums.iboats.com/forum/boat-...ddy-walkaround
              https://forums.iboats.com/forum/engin...-new-fuel-pump
              www.flotationfoamsolutions.com

              Comment

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