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Old 08-01-2005, 06:40 PM   #1
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Engine problems

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I have been flying on my own for a few years but continue to have engine problems.

I have just broken in a super tiger 0.75 following the directions pretty much to a T. The engine starts great and runs fine when I am doing the run up...sounds great. Then I taxi to the end of the runway and turn around and it stalls. Sometimes I get halfway back and sure enough it will stall.

I installed the fuel tank wrapped in foam and as directed in the directions (great planes superskybolt). I am using a fuel valve to fill (which also seems to take forever using a hand pump). I have a strap on Pitts style muffler.

I am confused as to what the problem might be. I have seen no bubbles in the fuel lines but again it funs fine when I run it up --just when I let it taxi the problems begin. The glow plug is new. The fuel is from this May....

I have had the exact same problems with my RV-4 (supertiger 40) but it ofter gets in the air and will run perfectly and then all of a sudden run rough or die.

Any Ideas would be appreciated I sure wanna get this new bird in the air.
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Old 08-01-2005, 09:20 PM   #2
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Engine Problems

What it sounds like to me is that the low end on the carburetor isn't set right (running too lean). Try riching the fuel mixer on the low end adjustment screw just very slightly.

If the engine hesitates going to full throttle you've richened it too much.

Good Luck and happy flying,
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Old 08-01-2005, 09:34 PM   #3
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Try a Hanger 9 two stroke performance plug.

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Old 08-02-2005, 06:17 PM   #4
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thanks guys. I will try leaning the low end. I admit I didn't pay much attention to that when I was setting it up...didn't think it was that important as long as it sounded good at idle....now I know,
Thanks...gonna give it another whirl,
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Old 08-11-2005, 03:56 AM   #5
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You mentioned that you are using a Pitts style muffler. This information is from the Tower website regarding the G-2300. A friend of mine did this and it works very well. It may apply to the G-75 as well.

"This Is A Must - when selecting any muffler --you must restrict
the exhaust - if necessary, to permit a very broad, easily-
adjusted needle. This requires about 1/2 psi pressure OR about
what you get with the stock muffler and one exhaust outlet."
1/2A all the way!
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Old 09-01-2005, 08:24 PM   #6
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Wrong thread.
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Old 09-03-2005, 07:45 AM   #7
alpha flanker
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filler tube

I run a super tigre 45 and fill through tube also.Mine will fill through it but if I try taking fuel outta tank when finished for day it will not drain through filler tube,have t o take engine cowling of and drain through carb line..Have had a real experienced pilot set it up for me ,but still doing same thing.I am thinking of changing my fuel tank anyway as it will only run for about 12 mins on a tank of fuel.Fuel tanks seem to me like a trouble area,but my plane runs well ,just not filling and draining the way it should.
At least in rc flying ,we live to fly another day if we crash!
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