[Ulf]

hey guys, have been flowing my EF Edge (flies fantastic btw) but am having some motor cutting out issues. Half way through the tank the motors always stops running when advancing the throttle. I do not think it's a mixture issue since everything runs as perfect as it can be for a brand new motor when taking off.
We have seen a lot of foaming in the tank and airbubbles in the line. The foaming also seems to get more when the fuel level sinks. The tank is hold on with some tie wraps and the supplied standoffs from the fuse are not used (just double layer of foam). Do you guys think that foaming is the reason for my problem ? Should I get rid of the tie wraps ? Use the standoffs ? Use rubber bands to hold on the tank ?
This sucks, since you can't do any low stuff :?

 

[PaulSwany]

I'd nix the tie raps for sure... or at least use a little fuel tubbing over the tye rap so it doesn't hold the tank down so tight.

Another thing that might be happening.... The engine could be overheating because you are just a little ritch... try fattinging up the main mixture screw and make sure you idle mixture screw is set right... If it want's to load up, lean that bad boy out a little...

What fuel are you running? Do you have any head shims?

 

[Ulf]

I am running 20% fuel, but did add a head shim. My other Irvine has no problems with this fuel.
Paul, you mean overheating from being too rich ?

 

[ChuckAuger]

My guess is foaming...I rubberbanded my tank on with just a couple of rubberbands. It foams a little, not bad enough to keep me from flying. I had some trouble with deadsticks on my Irvine (first ones ever!) and flushing out the needle fixed that.

Me, you, and Gator will all have Irvine 53 powered EF's at Texarkana 8)

 

[PaulSwany]

I am running 20% fuel, but did add a head shim. My other Irvine has no problems with this fuel.
Paul, you mean overheating from being too rich ?

No, overheating from being just a little to lean. I found that my Irvine ran a lot hotter on 15% than the 10% with 20% oil. I run it pretty rich on the main needle and adjust the idle needle for good transition.

 

[Ulf]

Will definitely take the tiewraps off.
Chuck, what do you mena by flushing out the needle ?

 

[ChuckAuger]

I just pulled the needle valve out and blew thru the vent line and then took the line off the carb and put the fueling probe from my pump into where the needle valve goes and turned the pump on....this shoots fuel everywhere, but it evidently dislodged some crap in my carb.

 

[Jim D]

Ulf, one of club speed freaks was testing a new "anti-foaming" fuel pickup clunk yesterday on his MagnumR. He was pleased as punch with it because he didn't want to have to go to a bladder tank. Let me see if I can find out where he got it.

 

[Jim D]

Here's the clunk:

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXXF25&P=7

He's running a weston 50 on a pipe with a 9x7 prop over 19k static and was having surging, etc, etc with fuel foaming. Seemed to run solid through the tank using this clunk.
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[446]

dubro makes a similar product, a sintered brass one like a fish tank aerator. got 3 or 4 laying around here. http://www2.towerhobbies.com/cgi-bin/wt ... LXD741&P=7

it costs 1.90... what a bargain!

 

[RSands]

$1.90 vs $14.50?!! :shock: Why does this seam like a no brainer?

 

[Stano]

I have always heard Ivines like low Nitro mine seemed to do well on 10%

Foaming balance the dang prop hah or a couple of drops of Armor ALL with nix the foaming...

I always axed the baffles ran a hotter plug and used 10% nitro

 

[Ulf]

well, I guess it just needed it's time and Pauly's magic tuning hands as well as a new plug (Enya #4). It is now running just fine like I am used to from my other Irvine 53. 8)
Thanks to all that helped.