Echo 2511T fuel tank repair

[dangerousatom]

Ok here’s the long explanation:

I could not recommend any epoxy, as plastic fuel tanks and cans are a type of plastic that is particularly difficult to bond. Unless it’s been specifically chemically formulated to be used on High-Density Polyethylene. Most “plastic” epoxy will not bond great to HDPE and usually are not fuel friendly. It may seem like it bonds but after a few hours of fuel exposure it usually will fail or peel right off. HDPE needs a chemical bond to truly set and seal. Most plastic epoxy acts as a bridge over the break more than a bond, that’s why they all heavily state ruffing the surface and cleaning. A good plastic welding job with the same plastic is the only 100% way to patch-seal it.
There are a few 2part puddy type epoxy’s that kinda work but IMO they are difficult to get to bond and cure brittle which then crack.
-Marine Tex
-Quick Steel plastic tank repair

-3M HDPE Weld
There are at least a dozen slightly different types in this category for different uses from 3M and some say “fuel safe” This might be the best liquid type I’ve used but hard to find and pricy since it’s always a big 2part kit of 50 to 500cc or bigger syringe type. I also don’t really belive the fuel compatibles that it’s said to have since it eventually fails.

WELD IT

 

[Junk Meister]

Ok here’s the long explanation:

I could not recommend any epoxy, as plastic fuel tanks and cans are a type of plastic that is particularly difficult to bond. Unless it’s been specifically chemically formulated to be used on High-Density Polyethylene. Most “plastic” epoxy will not bond great to HDPE and usually are not fuel friendly. It may seem like it bonds but after a few hours of fuel exposure it usually will fail or peel right off. HDPE needs a chemical bond to truly set and seal. Most plastic epoxy acts as a bridge over the break more than a bond, that’s why they all heavily state ruffing the surface and cleaning. A good plastic welding job with the same plastic is the only 100% way to patch-seal it.
There are a few 2part puddy type epoxy’s that kinda work but IMO they are difficult to get to bond and cure brittle which then crack.
-Marine Tex
-Quick Steel plastic tank repair

-3M HDPE Weld
There are at least a dozen slightly different types in this category for different uses from 3M and some say “fuel safe” This might be the best liquid type I’ve used but hard to find and pricy since it’s always a big 2part kit of 50 to 500cc or bigger syringe type. I also don’t really belive the fuel compatibles that it’s said to have since it eventually fails.

WELD IT

WELD IT I WILL!!! Your explanation CUT TO THE POINT. I will experiment with a 2171 Tank that was CLOBBERED before I got it. I will cut some strips from the same practice tank and see about reinforcing the AV boss on the same tank as a trial run.
Thank You for the long version of explaining.