Fuel Leak Around Tank Fitting

[Bosn Mate]

Good Evening

I have a 2017 Ranger Tugs R29 Sedan. The fuel tank has an unused stainless steel tank fitting with a threaded pipe plug screwed into it which is leaking. I believe the leak is coming from where the fitting is attached to the tank, not the pipe plug threads.

I would appreciate any information regarding how to fix this issue.

Thanks,

Mike

 

[Full_O_Fish]

If it is the same as a cut water, the roto-molded plastic tank is made by Moeller as a custom size/ design for fluid motion. In the area where the fill hoses attach to a tank stamping from the manufacturer showing the model of the tank.

With all roto molded tanks, if it is leaking from the actual plastic due to a crack or similar failure... Fittings can be removed, larger hole drilled, and a new fitting spin welded into place. This is a process that requires specialty equipment.

 

[BB marine]

Good Evening

I have a 2017 Ranger Tugs R29 Sedan. The fuel tank has an unused stainless steel tank fitting with a threaded pipe plug screwed into it which is leaking. I believe the leak is coming from where the fitting is attached to the tank, not the pipe plug threads.

I would appreciate any information regarding how to fix this issue.

Thanks,

Mike

The treaded pipe plug nut is the seal. The nut holds the threaded insert in place and tight. I posted to a thread a number of years ago explaining the removal of the pickup tube from the tank to remove the screen that is not needed for diesel powered boats.


"""I removed my pick up early on to remove the screen. To make the job easier and to confirm that you have no air leaks after the job is completed I recommend removing all fittings in the order,
(1) remove fuel hose and plug it with a 3/8 barb fittings and a pipe cap threaded on the male barb fitting threads.
( 2) Remove the fuel valve. Unthread it from the pipe nipple and reducer
(3) Very important!!!! The large nut that sits flush to the tank top surface must not move when you are unscrewing the tank fuel pickup tube. Back the nut up with a properly sized wrench. Hold that wrench when loosening the pick up tube fitting. The Pick up tube fitting is going to be tight and will require a good amount of force to loosen. HOLD THE BACK UP WRENCH ANY TIME YOU ARE TRYING TO LOOSEN THE PICKUP TUBE FITTING. Once the fitting breaks loose apply a small amount lubrication to the threads and work the treads until it loosens then unscrew it the tube will pull out of the tank. There is a screen on the bottom of the tube remove it.

The large nut that sits on the surface of the tank holds and seals the threaded insertion installed in the tank in place. It is very important to not disturb this fitting by loosening it. It may leak if it is disturbed.

Do not let this happen http://i363.photobucket.com/albums/oo76 ... ure010.jpg
Pick up tube gallery2.php?g2_itemId=52942

gallery2.php?g2_itemId=52966 This was my arrangement after installing polishing system. Notice the one port used to access the tank for inspection of water. The pipe plug is removes and an 1/8 inch tube is inserted to the bottom of the tank. Using a small drill driven oil pump and a container the sample is taken from the bottom of the tank.""""""

If the nut was loose and leaking and you were able to snug the nut up tight there is a good chance that it is sealed. If not sealed and the nut was loose. You may be able to loosen the nut carefully and back it off enough to squirt some pipe dope (

LOCTITE Pipe Thread Sealant: 565, 1.7 fl oz, Tube, Off-White)​

under the nut attempting to get some on the threads coated then tighten the nut down. This will for sure seal it.

 

[Bosn Mate]

Brian:

Thanks for the info! I am going to watch it and see if it sealed.

Follow-up if it doesn't and I try the Loctite 565. If I leave the pipe plug alone, can I back off the large nut that sits on the surface of the tank all the way while holding the pipe plug to fully gain access to the threads? I assume I can as my holding the pipe plug tight will take the place of the large nut and prevent movement inside the tank.

Mike