I have had the nexstar for some time now and love it. I had to change the fuel lines and i forgot to mark them and replaced them all with the same color. Now i don't know which one goes where. Does it even matter? Can someone explane the setup to me? Thanks

Unfortunately it does make a difference where the lines go.
If you're standing in front of the plane and look down behind the engine, here's the setup: 1) The line on the far right goes to the remote needle valve. 2) The line in the middle is the "fill" line and that's where you put the "plug" 3) The line on the far left goes to the pressure fitting on the muffler.

Line #1 draws fuel from the tank Line #2 Used to fill only Line #3 Pressurizes the fuel tank and also acts as a "full" gauge.

Hope that helps. There's ton's more information about the NexStar on http://2ndrcflightschool.com/tipsandtricks.htm .

color doesnt really mean anything

THe nexstar has a somwhat wierd system of fueling as it is a 2 lin system i myself use a 2 line (one to the carb one to the exaust) you have easy accese to the carb line

ok so from the tank you will have 3 tubes

tube #1 has what we call a clunk on it it goes into the tank andhas this wight on the end to keep it in lowest part of the tank and thus always giving the engine fuel this line goes to the high speed needle valve (carb line)

tube#2 is your vent line this one comes from the muffler it over back pressure to the tank to help feed the engine fuel. This line connects to the tank you will will find a little tube that goes to the top of the tank this is your vernt line

tube #3 is your fueling line this is actually not nessecary on a nexstar because you can just as easly (actually easier in my opinoin) remove the line form the needl;e and fuel that way. this tube is the one with the small "cap" on it

I hope this helps

Yes, it does matter. First, how many lines does your fuel tank have? Two or three?

Let's start with a two line setup. Two lines come out of the tank, one is a vent, which goes to your muffler for pressurization of the fuels tank. The vent line must have access to an air pocket in the tank when the tank is full. Usually the tube that the vent is attached to have a slight bend up, away from the fuel. The second line is the feed line to your carburetor. Attached to the other side of that line is the "clunk." The clunk is a metal nipple that is suspended from another piece of fuel line inside the tank. It is supposed to barely reach the back, bottom portion of the tank so that it can draw out all the fuel. If it is too long it can become lodged within itself and reduce your flight times, or starve your engine of fuel at a very inopportune time.

Three line system. This setup has all the basic components as a two line system except that it has a third line that is generally used for fueling and defueling the tank. I use this setup on my .25size Modeltech Extra 300. The third line has no clunk. It has a piece of metal tubing that the just clears the stopper. This allows me to fuel and defuel without removing the tubes from the muffler or carburetor and makes life with a cowl around the engine much nicer. There is however a stopper in the outboard length of tube to prevent the fuel from flowing out.

Hope this helps.

thanks so much guys.

wow that was confusing reading those answers.
flying freak weird way of fueling? not really, pretty common method actually.
for the NEXTAR the color code is simple, blue line is the fill.green line is the pressure line to the muffler,red line fuel to the carb.

the red line should be connected to the clunk the weighted line in the tank.

the green line should be connected to the pressure line which has a bend inside the tank directed to the top of the tank.

the blue line should be directed to the strait line into the tank for fueling.

to de-fuel your plane disconnect the red line and suck the fuel out through there only the red line will have the ability to draw the fuel out of the tank on the NEXTAR then fire up the engine to run any extra fuel out of the engine.some tanks are set up with a pipe or extra clunk on the fueling line but not the NEXTAR as it comes stock from the box.
as a side note best to check the tank to make sure yours has the fuel lines set up the right way and when you reinstall the tank that you have written down what line goes to where.so you prevent any unexpected dead sticks .

you missed the point. He lost track of which line was for which color at the tank. The one from the clunk always goes the the carb. If the is not folowed it will not run [long]

klunk to carb.

upward slanting pipe in tank to muffler.

strait pipe to fill line.

happy now,

wow that was simple and i agree with 90% of that the only thing is down pipe is fill line not strait (down so you can empty the tank at the end of the day)


And as for why i said it was wierd wzs because for cowled engines it would be normal but in this set up you have clean accese to all the fuel lines so it is simpler/ fast to fuel from the carb ( no litle cap to loose)