Notices

Gas vs fiberglass

Old 05-13-2004, 08:47 PM
  #1  
Junior Member
Thread Starter
 
Join Date: May 2004
Location:
Posts: 10
Default Gas vs fiberglass

Discovered a leaky gas tank in my 1985 ProLine.....some gas in bilge, but never enough to pool up. More like a consistent gas coating on the glass under the tank and on teh stringers from hull up about 4 inches over an area about 3 ft long. No telling how long this has been going on. Tank will be replaced very soon.

Anyway, do I need to worry about structural damage to the fiberglass from contact with gasoline over time? What should be done after the old tank is removed prior to installing the new tank?

Thanks.

ckfishr is offline  
Old 05-13-2004, 09:14 PM
  #2  
Senior MemberCaptains Club Member
 
Join Date: Jan 2003
Location: 1984 35 Bertram NJ
Posts: 5,914
Default RE: Gas vs fiberglass

No Problem. All my Bertrams have had fiberglass fuel tanks. Two gassers and my current diesel boat.
CB Haws is offline  
Old 05-13-2004, 09:38 PM
  #3  
Junior Member
 
Join Date: May 2004
Location:
Posts: 7
Default RE: Gas vs fiberglass

Glad you found it safely
flyfish45 is offline  
Old 05-13-2004, 10:19 PM
  #4  
Senior MemberCaptains Club Member
 
Join Date: Jan 2002
Location: Sullivans Island SC
Posts: 256
Default RE: Gas vs fiberglass

I recently had the same problem. Some of the glass around the stringers had some delamination. One of the previous owners had poured some epoxy and foam into the bilge at one time which only served to seal the drains. I ended up with a bilge full of gas so I'm not really sure whether the delamination was due to the gas or poor layup to begin with. Check the lamination by either pushing on the areas involved or tapping the area with a resin mallet. After finding a couple of pockets of delamination with gas underneath, I had to grind the fiberglass down in some areas and reglass.

While you have the tank out, check the bilge drains for obstructions.
Tin Man is offline  
Old 05-14-2004, 01:04 AM
  #5  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Nov 2002
Location: MA, USA
Posts: 671
Default RE: Gas vs fiberglass

Both f/g tanks in my Hat. 34 held gas for 32 years until a diesel refit. I pulled the pickups and inspected/cleaned last year & both tanks are fine.

Also, f/g is used in underground gas storage tank construction.
Doxy is offline  
Old 05-14-2004, 05:46 AM
  #6  
Junior Member
Thread Starter
 
Join Date: May 2004
Location:
Posts: 10
Default RE: Gas vs fiberglass

Doxy:

Are those tanks just resin and mat like I have in my hull, or are they coated with some protective barrier?

Thanks!
ckfishr is offline  
Old 05-14-2004, 06:21 AM
  #7  
Senior MemberCaptains Club Member
 
Join Date: Dec 2002
Location: Orlando
Posts: 3,997
Default RE: Gas vs fiberglass

This is one of those rare times where I will double post. It's a important enough issue to do so.

the gas wont penetrate or damage the hull. It can however seep into the stringers just as any water would do if there is a pinhole in the area the gas leak is. The upside to that, the gas will kill the little microbes rotting the wood.
The biggest risk in a gas leak, other than explosion of course is the gas attacking the plastic of the bilge pump housing. I will never understand how they can get away with using a material that literally melts from contact with gas for such a critical piece of gear.

When you pull the tank let the compartment air out a couple of days and be sure to epoxy coat the new tank.

Sea_Dad is offline  
Old 05-14-2004, 09:26 AM
  #8  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Nov 2002
Location: MA, USA
Posts: 671
Default RE: Gas vs fiberglass

ck,

Just laid up. No epoxy coating.

As stated by Sea Dad, be careful when dealing w/gas. Check for damage to other items, wires, hoses, etc. & be sure everything is grounded/bonded & well ventilated when working on it and afterward. Good Luck!

Doxy is offline  
Old 05-14-2004, 05:12 PM
  #9  
Junior Member
Thread Starter
 
Join Date: May 2004
Location:
Posts: 10
Default RE: Gas vs fiberglass

Thanks everyone who replied....I appreciate it.
ckfishr is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread