epoxy made for fuel exposure - carb repair

[wineyarders]

Hi,

I posted in the Suzuki forum with one good suggestion but thought I'd check in with the johnnyrude crowd. I have a couple mid 80s 15hp and thought there might be some insight in this forum given some comparable design features. Anyone know of a good epoxy made for fuel exposure that I can use on the inside of a carb to repair a non load-bearing aluminum break? Many thanks for any advice,

Ryan

Here's the info from my previous thread:

http://forums.iboats.com/showthread.php?t=555841&p=3818202


I have a 2000 Suzuki 5hp that needed a carb overhaul. Unfortunately I broke one of the aluminum arms that supports the float hinge pin. I have the part and could reattach it easily if there is a bonding agent that will resist having the exposure to the fuel. Can anyone refer me to a material that will bond the aluminum while holding up to the fuel exposure? I have jb weld on there now but don't have a whole lot of confidence it is a long term solution. Also, a new carb is about $150 so not a huge expense, but one I'd like to avoid if there's a solid alternative. Thanks for any advice.

Ryan

 

[Daviet]

Re: epoxy made for fuel exposure - carb repair

JB weld has worked for me in the past.

 

[Scott Danforth]

Re: epoxy made for fuel exposure - carb repair

JB weld fuel tank repair putty.

 

[Faztbullet]

Re: epoxy made for fuel exposure - carb repair

Devcon Aluminum Putty....

 

[durban]

Re: epoxy made for fuel exposure - carb repair

fix any thing & every thing , try this
http://forums.iboats.com/showthread.php?t=530630

 

[Chris1956]

Re: epoxy made for fuel exposure - carb repair

Epoxy in general is resistant to fuel. I like the marine-tex product. Make sure the area is clean (acetone is good) and it wouldn't hurt to rough up the exterior of the repair area to give the marine-tex some tooth. Mix it accurately and let it dry for 48 hours.

 

[wineyarders]

Re: epoxy made for fuel exposure - carb repair

Thanks for all the replies. I looked into JB WEld and they claim it's completely resistant to gas so I'm going to give it a chance.

 

[boobie]

Re: epoxy made for fuel exposure - carb repair

I'll stick with the Marine-Tex product also.

 

[tx1961whaler]

Re: epoxy made for fuel exposure - carb repair

I'll give the dissenting opinion here.
Are you going to trust that JB Welded carb to get you home?
When that boss eventually vibrates off of there, you will be stuck.

 

[wineyarders]

Re: epoxy made for fuel exposure - carb repair

So I checked the JB weld that I had put on there about a week ago and it was already peeling and very soft. I called marine tex and they said the gas will deteriorate any epoxy over time. New carb is on the way. I think the only viable solution would be a welded or braze bond, or a new carb. Anyway, thanks for the replies and advice.

 

[durban]

Re: epoxy made for fuel exposure - carb repair

i go by practical experience , example 1 year ago i fixed my fuel pump diaphragm it had a hole in it , & iam still using the same fuel pump , with my epoxy formula ,

 

[Chris1956]

Re: epoxy made for fuel exposure - carb repair

Gee, I epoxied some holes in a carb bowl, and it held up fine. I also fixed a leak in a steel fuel tank with Marine-Tex and FG cloth and that held for years....You could drill and pin it and use epoxy to join it.

 

[wineyarders]

Re: epoxy made for fuel exposure - carb repair

I was surprised too, particularly given ot was only a week. I think it might have to do with the fact that it is a very small repair with lots of surface area exposed to the fuel.

 

[schematic]

Re: epoxy made for fuel exposure - carb repair

I have experimented with this before. JB breaks down if largely exposed. PL Premium industrial Adhesive holds up if largely exposed.(1 month)
The "Gas/Oil Seal All" makes some incredable claims worth looking into. Any epoxy I am aware of will break down from Acetone. Acetone is found in some fuel additives and injector cleaners.

 

[Chris1956]

Re: epoxy made for fuel exposure - carb repair

I do not think acetone will harm fully cured poly or epoxy resins.

 

[mrcrabs]

Re: epoxy made for fuel exposure - carb repair

I use the Black Steel, on the shelf at wall mart, it holds up better than JB weld for me on things that vibrate. I used it to fill a void when I raised my transome on the jon boat...wood to aluminium and no cracking in 9 months...thats amazing to me.

 

[Scott Danforth]

Re: epoxy made for fuel exposure - carb repair

did you use the JB quick weld? as I stated, use the fuel tank repair epoxy.

 

[wineyarders]

Re: epoxy made for fuel exposure - carb repair

I tried the quick weld the first time and that didn't last at all. Then I tried the standard jb weld, which held up a little better, but not much.

 

[mrcrabs]

Re: epoxy made for fuel exposure - carb repair

Use the black steel, as I stated

 

[jimmbo]

Re: epoxy made for fuel exposure - carb repair

So I checked the JB weld that I had put on there about a week ago and it was already peeling and very soft. I called marine tex and they said the gas will deteriorate any epoxy over time. New carb is on the way. I think the only viable solution would be a welded or braze bond, or a new carb. Anyway, thanks for the replies and advice.

Sounds like inadequate mixing of the epoxy and hardener or mixed at the wrong ratio. I've used JB Weld to epoxy the fuel wells of Q-jet carbs and they've held for years in a very harsh enviroment.