Engine running out of gas with half tank

[racegig]

Hi everyone,


Just got a new DuneRunner today and I'm going thru the break in process.


I ran it idle for 30 minutes and after that started to drive it slowly around the house (20:1 mix) and it seems that when I get to about half thank, the engine seems to be running out of gas for a 30 second and finally stop.


When I topped the tank the buggy ran welll until about half thank.


I have a laser thermometer and when I point at the cylinder the temp never goes over 220 F.


I can't see any tube inside the tank and wonder If the tube in there is maybe not long enough or something.


There are 2 tubes that goes thru a rubber cap, I tried to open the cap but the $%/&?% seems glued there. I don't want to break anything can I just pull very hard and open this cap to look inside ?


Anyone had this problem ?


Maybe it got nothing to do with fuel and something else is wrong ?


By the way, on the plan there are no tube showing.


Sorry for my poor english


Thanks in advance.

 

[Greggfromohio]

Yeah the rubber cap with the tubes going through it is tight!! I struggled getting mine out but was finally able to pry it out with a screw driver without damaging it. It didn't look like it had any glue on it, just fits in there really snug.

 

[cordy]

Try venting the tank.There are many ways to do this,there are threads showing how to do it.

 

[racegig]

Thanks for the info I will try it again tonight. Going to give it the old screwdriver trick.

I've been working out for that...

So you know what's under there. I guess the best position for the tube is to sit right in between the tank at the bottom.

By the way, why 2 tubes ? One is for the overflow or something. How do I know which one is sucking gas ?

I guess you already found out that I'm a newbie at gas and stuff...

 

[RampageHopUps]

The line with the clunk on it is the feed line. That should be able to move around to the bottom of the tank.

The other line is for a return from the carb. That just needs to be in around an inch or two.

Venting the fuel tank will be very helpfull to the overall running of your engine.

 

[Guest]

The tank needs to be vented. It will stall if you don't vent it.

 

[blak__jak]

+1 on venting being your problem. check out this thread and others.

http://www.redcatrampageforum.com/showthread.php?t=9485

 

[vpalace]

I thought the return should only be in 1/4" - 1/2". 1"-2" will put it in the fuel.

Feed is on the bottom of the carb, return is on the top next to the primer bulb.

 

[racegig]

Wilco guys

Gonna try that venting before anything else

Thanks

 

[racegig]

It turned out that the clunk was not sitting deep enough in the tank.

I still did vent the tank thru the grommet.

Engine is running well now.

 

[Guest]

Good to hear just an easy fix.

 

[Phill]

When venting the tank is it better to have the clunk just touching the bottom or to have it with a bit of slack which would mean it laying on its side?

Thanks

Phill

 

[Guest]

Just touching the bottom. That will keep it from sliding around in the tank.

 

[Phill]

Thanks for that

 

[Deluge]

I lay the clunk on it's side. Keeps it from flopping around and it sucks up the fuel a lot better. The tank is pretty much dry by the time I finish running.

 

[Phill]

Thanks Deluge

 

[MrClass]

Ddm has a tank venting grommets that I just ordered everyone should buy one ! Just need to supply fuel line . I've already had the same problem ! Look at your carb ball if it's empty loosen gas cap and re-prime you'll be good to go again but it dose suck !

 

[Phill]

I just put one on mine

Works great

If you get the see thru fuel line at the same time you can see where your fuel is flowing to/from