Not that I've done it, but I was wondering if it was a definate no-no, even though the pressure line may throw burnt fuel/oil etc... into the fuel tank anyway.

Thanks, NJF72

It is not a no-no, but I would rather use a third line, in which I permanently install a good filter. That way, the only foreign matter that enters the fuel tank can do so by the pressure line. I also use the third line to empty the tank.
Even so, The very fine mesh I use in the fuel line filter gets clogged after a while.

it is a BIG no-no... in fact, it won't even work. when you push fuel into the tank via the pressure line, the air in the tank has to be released somehow. the only problem is that it can't, and instead you will just push fuel out the carb and really flood the engine in the process. doesn't matter how you try, you won't be able to get more then an ounce or so of fuel into the tank anyway.

blow the stopper out at best!

I always fill through the pressure line. Because I use metal tanks, they don't blow up. Actually I have a capped overflow at the top of the tank which I open to vent the tank while filling. I run uniflow tanks, which means the pressure line is in the fuel. I have one set up here the engine is side mounted and the muffler is below the tank. On that set up, I have to replace the vent cap first, then reattach the pressure line. I found that if I replaced the pressure line first, then the vent cap, fuel would siphon out the pressure line and into the muffler. I got a couple of really short runs before I figured that out.[X(]

Jim

I just ran into this problem. The feed line to the remote needle valve is very
difficult to remove, because the engine is tilted just a bit downwards. The engine
cannot be fueled from the front side of the carb, because the needle valve is too
restrictive of fuel flow, and the fueling line blows off....from the pressure.

The answer was to fuel into the vent line with the feed line removed from the nipple
to allow the venting of fuel. The tank can be de-fueled from the fuel line to the carb, as normal....but it's easier to just run the plane out of fuel after the last flight.

Dave.

Jim
I fill like you do through the uniflow line but I loop the line up inside the cowl so the top of the loop is above the top of the tank. When the tank is full I use my filler bottle (yeah, the old type squeeze bottle ) to blow air through the pressure line so there's no fuel in there to syphon out.

awwwwwwwwww look at the little red dust cap

Any way I tried fueling through the pressure tube and flooded my engine. [X(] So I won't be doing that anymore

Hi,

I have an "overflow" bottle with a brass tube and vent on it.

When filling, I remove the muffler/exhaust pressure line and attach the bottle to the line and I then fill through the carburettor line.

When the tank is full, the excess fuel goes out of the tank, into the exhaust pressure line, and then into the overflow bottle.

After a day's flying I'm amazed with how much fuel I have gathered in the bottle. If I'm careless and don't watch the filling carefully, I sometimes capture enough overflow fuel for another flight! I would have lost this fuel otherwise. I often wonder how much fuel is lost at the flying field with people overfilling.

One hint I picked up over the years to avoid confusing, and mixing the lines is to use a different color line for exhaust pressure and the carburettor input line. I always think of the muffler as being hot, so I use red (pink) fuel line for the exhaust pressure line. I consider the fuel going into the carburettor as being cool, so I use blue fuel line for carburettor input. Its easy for me to remember.

I also have filters in my fuel jug as well as in the carburettor input line. I don't fill through the input line filter.

Hope this helps.

Fly4Fun,

Wayne Miller

Gentlemen why dont u think use of easy fueler system? an attachment on the carb line.

lots of reasons not to use a easy fueler.. they ALL tend to leak at some point, and you need a special connector to fuel with it, which ends up disappearing somewhere...

Wayne, im just the oposite, blue means air and red means fire(fuel). so my dots are red and blue, not my lines, there just whatever color i have. haha!! and i just plug another piece of tubing into my blue line(vent) and run it to my fuel can im pulling from, that way there is no extra transfer, it goes right back where it comes from and is ready for next fueling! but basicly the same routine.

Gary

I like the remote fuelers....I use blue line for the exhaust (flame), and
pink for the (pink) color of the fuel I use. Unlike the fuel dots, the remote
fuelers cut off the flow of fuel to the carb when fueling, and eliminates flooding.

If you can't get to the fuel line, like in certain inverted installations....the remote
is the only way to go. I usually give the fueler fitting on the plane a little squirt
of fuel to remove any unseen dirt or dust build-up, before I shove the line into
the fitting....dirt getting in there will cut short the life of the fitting.

The exception is on YS engines, where fuel dots are used....but they have the
one way check valve.

FBD.