Hi guys. This is my first message and hope all u RCers can help me out.Anyway i made a third hole in the fuel tank for refuelling the tank because my plane(A CAP 232 by Kyosho) has a fixed cowl. Now i found another way of refuelling my plane by having two tubes outside the cowl( one from the tank and one to the carb) and want to seal of the 3rd hole which i made.I used epoxy but it looks like it is leaking. should i make the opening again and use a small tube with a screw or something to block the opening and prevent it from leaking?I have done this method without creating an opening in that hole which was sealed but the problem is that the fuel which leaks out has no other place to go from the tube and leaks out from that tube which was fitted with a screwinto the plane. I also have noticed that the epoxy placed at the 3rd hole is 'melting' and mixing with the fuel. will this damage the engine(having some epoxy in the fuel)? Please help!!

thank you.

Welcome to RC Universe!

Now, onto your question.

You can either go to your LHS and buy a new fuel tank stopper for a couple dollars, or block it up.

You can either block it up or just use that third line and let it hang from the bottom of the cowl with a fuel line plug. Makes it easy to fuel up, but it looks like you've already got that figured out.

I think I would just stick some leftover brass tube in there. Kink it on the ouside of the tank and then put some fuel tubing over it with a plug on the end. It should be fine...

As far as the epoxy in the fuel, I'm not too sure. See if you can knock it out of the hole before putting it all back. If it's breaking up in pieces, it is going to clog up your carburator. Are you using a fuel filter? Might be a good idea for a while...

How do you like that Cap? I loved mine. I had a Pro .46 on it and it was perfect! I miss that thing...

I would open the hole back up & fill it with silicon, let it dry & try it again

Gil

You can get a new stopper or you can plug the third hole with a screw or just glue in a fat toothpick.

For a few dollars I'd replace the tank, or at least the stopper.

Since were on the subject, my stopper has three holes, but I don't plan on placing a third line for filling. It came with two brass pipes, the clunk(sp?), and some tubing. Any idea? it is a Duo-Bro brand. Also the plug is made of a rubber, but it came with two plastic pieces that seem to fit in somewhere as well. I didn't have directions to go from so any help is appreciated (yes I checked Du-Bros website, but it was almost useless).

Thanks alot guys and to BattleRocketWar...The planes great.Have a TT Pro 46 and flies well now...Had some prob with the engine...Had to change the sleeve and piston and its running fine..TOuch wood...
Will try to remove the epoxy but just wondering if epoxy is soluble in methanol, nitro or castor oil?
THANKS GUYS......

Duct tape?

nah i think it will still leak with ducks on

If you can get a new stopper eaisly, that would be the way to go, if not take the stopper out & fill the hole with silicon, the kind you use on car gaskets, when you fill the hole kinda make a little mushroom head on both sides of the stopper, let it dry & put it back together & your problems will be over.

Gil

Just replace the darn thing. It wont cost but a little bit and the peace of mind you will have from knowing it is done right will be worth it. Less time fiddling with it and more time to fly! Good luck!

Aeronaut:
You see where this dude is from?? I don't know but parts may not be readily available in Malaysia !!

Gil

Aeronaut,

Actually we do get everything here from A-Z but the thing is it is expensive compared to the States as our tax here for imported goods are kinda high. Plus i'm still studying and I'm trying to cut cost as much as possible.
thanks anyway guys and please keep the idieas coming in.
Cheers

Doesn't the stopper have a hard plastic plate? What about sandwiching a piece of rubber between the plastic plate and the stopper?
Dennis-

I'm not sure what plastic plate you are referring to.The third hole was actually sealled till i made a puncture to it.No stopper. i have for the time being ealed it off with the epoxy but as i said it aint good enough.Maybe will try silicon or the easier method which i have heard so far is remove the epoxy(which i hope is not too tough to remove!!) and connect a fuel tube over it and plug it up with a stopper.
Plz flood in with any other better suggestion.
Cheers.

Cut a piece of plastic milk jug and melt a piece of the plastic milk jug with a lighter over the hole. This will seal up the hole. I did this on one of my tanks that was leaking, works nice. BE CAREFUL WITH THE GAS AND FLAME MAY CASE A FIRE OR EXPLOSION, EMPTY ALL FUEL OUT. BE CAREFUL




Chris

WOW never thought of that...thanks

You can also use a soldering iron & the plastic top of a coffee can, butter bowl or any number of items you buy @ the grocery store to repair fuel tanks.

Gil

Why not just purchase a new tank.
They are not THAT expensive!

The best thing I have seen so far is take your tank out light a match and run like hell!!!!!!

Solder one end of a piece of brass tube and put it in as a plug. You can just fill the end of the tube, or pinch it before soldering. Or maybe use an old drill bit, or even a piece of wire such as a remnant from a small landing gear. The problem with a screw is that fuel will travel along the screw thread. If you use a screw, use a long one with a smooth shoulder where it's not threaded.
There are lots of options.

Tim

Is applying Super glue over the hole help??

The best way I have found is to use a short peice of tubing and solder it shut and insert into the third hole, and tighten the screw. The small plastic plate goes on the inside and the larger one goes on the outside and fits over the neck of the tank. tighen the whple thing down with the center screw. The third hole will the tubing with the soldered shut end will fill the hole and prevent it from leaking.