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Royirish · 05-06-2006, 03:53 PM

I have installed fuel filler valves on both planes that I built. I had a manual crank pump and it took a long time to fill the tank--seems to be a lot of pressure.

Bought an electric pump but when I went to use it the pressure caused the tubing to shoot off of the metal nozzle. Am I supposed to be clamping the tube to stuff? Did I muck up both of my filler valves? I could always fill the tanks with the hand crank but it took forever!

Any thoughts are appreciated,

Thanks,
Jake

moo · 05-06-2006, 05:16 PM

Something definitely wrong here.

The pressure should bleed out the muffer through the pressure tap.

Maybe you have the filler valve on the pressure line instead of the carb feed line? Often filler valves get their own line in to the tank (third line).

Royirish · 05-06-2006, 05:27 PM

It is possible I messed up the installation, but I don't think it would work if I did.

There are two fuel lines coming off of the filler valve: one goes to the carb and the other to the fuel tank. The pressure line to the muffler is direct from the fuel tank.

The fuel flows freely to the carburator, I just have trouble with getting the fuel to flow to the tank. The electric pump worked perfectly when I pulled the line off of the carburator--which leaves the valve itself I believe.

I made sure the fuel lines were not kinked. I think I used medium tubing (one engine is .40 and the other .75).

I figured it could be a fluke on my first model but now I have two very difficult models to fuel.

Robw · 05-06-2006, 05:29 PM

You may have the tubing on the incorrect nipple. If it is wrong then you are trying to send fuel to the carburetor instead of the fuel tank and that will cause a lot of back pressure. Try switching the tubes around.

hifly2104 · 05-06-2006, 06:15 PM

He try this link they are so simple to instal other (than needing third line) cheap, look good ,etc.When I first started flying I used the filler valves ,try and keep tabs on that nipple needed to fill with

http://cgi.ebay.ca/ws/eBayISAPI.dll?...e=STRK:MEWA:IT
Your LHS will have them too I just used the link for the picture.Mind you his price with shipping to Ontario was less for 2 than what I paid for 1 at LHS.We now have a new store in town Hurray

moo · 05-06-2006, 10:04 PM

Quote:

Originally Posted by Royirish

I figured it could be a fluke on my first model but now I have two very difficult models to fuel.

Your installation sounds correct, is the filler tip right for the fuel valve? (i.e. switching it from run to refuel) I noticed the sullivan ones need a long tube into it to switch it.

Sullivan fuel valve
Bisson fuel dot on a third tube works well too.

Royirish · 05-07-2006, 07:27 PM

Son of a Gun!

Thanks erg, what a simple solution that was! I was using the wrong nozzle to insert into the filler valve. I never noticed when I bought the fuel filler valves that they came with a different nozzle than had come with my fuel pumps.

Life is much easier now. Thanks again for the input guys,
Happy Flying!

lehma · 06-16-2006, 02:47 PM

Hi there.

One thing to be careful of as that component gets older is that it doesn't close all the way and lets air in.

I had one (very old) and it must have introduced a large air bubble at just about takeoff = plane died!

It was a 60 size hobbico trainer.

05-06-2006, 03:53 PM	#1
Royirish Join Date: May 2006 Feedback: 0 / 0% Posts: 3 Total Props: 0	fuel filler valve Remove this ad - become a site supporter! I have installed fuel filler valves on both planes that I built. I had a manual crank pump and it took a long time to fill the tank--seems to be a lot of pressure. Bought an electric pump but when I went to use it the pressure caused the tubing to shoot off of the metal nozzle. Am I supposed to be clamping the tube to stuff? Did I muck up both of my filler valves? I could always fill the tanks with the hand crank but it took forever! Any thoughts are appreciated, Thanks, Jake
	.

05-06-2006, 05:16 PM	#2
moo RCC Supreme Contributor I am: eric q Join Date: Jun 2005 Location: Crawford Lake, Ontario Radio of choice: Turborix # of RCs: too Feedback: 9 / 100% Posts: 7,148 Total Props: 27	Something definitely wrong here. The pressure should bleed out the muffer through the pressure tap. Maybe you have the filler valve on the pressure line instead of the carb feed line? Often filler valves get their own line in to the tank (third line). __________________ desiderantes meliorem patriam To err is human, to moo is bovine
	.

05-06-2006, 05:29 PM	#4
Robw RCC Contributor I am: Rob W Join Date: Nov 2004 Location: Stoney Creek, Ontario Feedback: 3 / 100% Posts: 336 Total Props: 0	You may have the tubing on the incorrect nipple. If it is wrong then you are trying to send fuel to the carburetor instead of the fuel tank and that will cause a lot of back pressure. Try switching the tubes around. __________________ Rob Weiss Flying Tigers RC Club MAAC# 50959
	.

05-06-2006, 06:15 PM	#5
hifly2104 RCC Supreme Contributor I am: Mike G Join Date: Jan 2005 Location: Elmira Ont. Radio of choice: Futaba 9c # of RCs: 14 Feedback: 40 / 100% Posts: 5,089 Total Props: 15	Fuel Filler He try this link they are so simple to instal other (than needing third line) cheap, look good ,etc.When I first started flying I used the filler valves ,try and keep tabs on that nipple needed to fill with http://cgi.ebay.ca/ws/eBayISAPI.dll?...e=STRK:MEWA:IT Your LHS will have them too I just used the link for the picture.Mind you his price with shipping to Ontario was less for 2 than what I paid for 1 at LHS.We now have a new store in town Hurray
	.

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05-06-2006, 05:27 PM	#3
Royirish Join Date: May 2006 Feedback: 0 / 0% Posts: 3 Total Props: 0	It is possible I messed up the installation, but I don't think it would work if I did. There are two fuel lines coming off of the filler valve: one goes to the carb and the other to the fuel tank. The pressure line to the muffler is direct from the fuel tank. The fuel flows freely to the carburator, I just have trouble with getting the fuel to flow to the tank. The electric pump worked perfectly when I pulled the line off of the carburator--which leaves the valve itself I believe. I made sure the fuel lines were not kinked. I think I used medium tubing (one engine is .40 and the other .75). I figured it could be a fluke on my first model but now I have two very difficult models to fuel.
	.

05-07-2006, 07:27 PM	#7
Royirish Join Date: May 2006 Feedback: 0 / 0% Posts: 3 Total Props: 0	Son of a Gun! Thanks erg, what a simple solution that was! I was using the wrong nozzle to insert into the filler valve. I never noticed when I bought the fuel filler valves that they came with a different nozzle than had come with my fuel pumps. Life is much easier now. Thanks again for the input guys, Happy Flying!
	.

06-16-2006, 02:47 PM	#8
lehma RCC Apprentice Join Date: May 2006 Location: Waterloo, ONTARIO Feedback: 0 / 0% Posts: 30 Total Props: 0	Hi there. One thing to be careful of as that component gets older is that it doesn't close all the way and lets air in. I had one (very old) and it must have introduced a large air bubble at just about takeoff = plane died! It was a 60 size hobbico trainer.
	.

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