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Old 01-25-2005, 04:32 PM   #1
matthew cotton
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gms 47 problem

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Hi my Gms 47 is runnning well but my needle valve dosen't seem to work even at 5 1/2 turns out its running like it was at 1 turn out any where i put it its the same. the plane is a lanier pro twister a profile s o the engine is side mounted and the fuel tank is on the other side. Can some one please tell me whats wrong.
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Old 01-25-2005, 04:52 PM   #2
RC Boy
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gms 47 problem

good day

There is a good thread on this site, address is below

Basically, I had the same problem, which is probably leaking air somewhere, and I followed all the suggestion listed on that thread and I ended up inverting the Carb holding bolt, putting gasket grease everywhere, and since I was running the engine with a pitts style muffler, I also plugged the exausts in order to keep back pressure.

The engine runs perfectly now, start in the first few turns of electric starter, even in minus 10 degree. and use all the fuel in the tank, no more deadstick due to engine cut out, but due to lack of gas...

One last comment, I have noticed that in winter, I have to open the needle valve more on all my engine, must be linked to air density or something like that...

Hope this help
RC Boy
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