Fiberglass tank fill issue

[Capt. Lou]

I was attempting to screw in a reducer/gauge cap to my corroded tank fill bung. The old fill bung snapped off top of fiberglass tank. I believe it may have been attached using 5200. I am not familiar with the construction of fiberglass tanks but it seems mine had a large access on top and they embedded the fill bung into a square piece of unknown material and then screwed that down to the top of the fiberglass tank with plenty of adhesive and maybe even a coating on top of it. Anyway I was thinking I could just 5200 bung back on. Here are some photos that may help explain. Looking for ideas...thanks

 

[Capt. Lou]

iPad is one pic at a time.

 

[Capt. Lou]

And another

 

[Capt. Lou]

And what I was trying to achieve was a visible gauge. Not sure I like the clear cover but I couldn't keep the screw in kind of hatch because there wasn't any Clarence above the cap

 

[Blitzen]

Here is one thought, if the pad or fiberglass is thick enough to get a few threads into it, clean up the opening and tap the top of the tank for the proper size nipple and then use a reducer and bushing to reduce it to the size of your gauge. And don't forget the proper joint compound for gas/diesel

 

[traditions]

That tank doesn't very thick.I would get a thick piece of glass,tap it with a 1 1/2 pipe tap,screw a 1 1/2 to 1 1/4 reducer into it and fasten it the same way the other one is.By using the reducer you have a set of good threads to screw some thing into.

 

[tunaorlater]

I would clean both surfaces very good and epoxy it back on.

 

[ToemanDoug]

Capt. Lou, would you mind sharing some info about the gauge you have there? Brand, source of supply, anything to point me in the right direction.

I have been loking for a mechanical in tank gauge like that, but google has not been my friend.

Thanks, in advance.

 

[El Mar]

I second the epoxy.

Clean clean clean with simple green then acetone.

Keep it out of the fuel of course.

 

[Capt. Lou]

Capt. Lou, would you mind sharing some info about the gauge you have there? Brand, source of supply, anything to point me in the right direction.

I have been loking for a mechanical in tank gauge like that, but google has not been my friend.

Thanks, in advance.

I own gas stations and happened to be looking at a catalog for supplies and noticed they made mechanical gauges for standard 50 gal drum bungs. I have the same bungs as fuel tank tops. You have to specify tank depth when ordering i paid $25/ cap. they took 2 weeks to get. got them from Jme
Krueger Sentry Gauge Type L Gauges - L221

http://http://www.jmesales.com/catalog/productinfo.aspx?id=6118&cid=4325&skuid=KSL221&gclid=CJ-FgoTB1bYCFQsy4AodnxYAZg

 

[Capt. Lou]

My solution was I took a 1/4 inch piece of starboard and cut a hole and screwed and 5200 in the reducer cap. I then 4200 the hell out of the starboard plate and placed over old hole and screwed it in. I was thinking of putting a layer of west system over the whole top and painting it white just to clean it up. Will west system be in contact with 4200??
Here are photos:

 

[Capt. Lou]

Old hole........

 

[Capt. Lou]

New plate in....

 

[Capt. Lou]

Finished?.......

 

[Capt. Lou]

Last one.....