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HelicopterEngines Plugs Mufflers Fuel › How many turn on small needle valve (YS 50 engine)
03-23-2009 04:59 AM  8 years agoPost 1
saigon-heli

rrApprentice

Ho Chi Minh

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Hi,

I messed up my small needle valve (then one that is adjusted by screw driver) setting on my YS 50 engine. Now, I want to go back to manufacturer setting.

Does any one know how many turn is it from fully close position?

Thanks in advance,

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03-23-2009 12:08 PM  8 years agoPost 2
Chuckie

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Crofton Maryland

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I think mine is about 1 to 1.2 turn out. Set for good idle but on the rich side. Mine is a little rich and during spinning up a cold motor/rotor you can tell its a little rich. Once the motor is fully warm it spools up nicely.

Charles

Please stand by for faster service!

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03-23-2009 12:11 PM  8 years agoPost 3
Cheech91060

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Aberdeen, MD

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By the book its 1 turn out to start.
Mine's set right around 3/4.

Frank
HBFP, Trex 450, Vibe 50

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03-23-2009 04:11 PM  8 years agoPost 4
saigon-heli

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Ho Chi Minh

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Hi Chuckie & Cheech91060,

Thanks,

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03-23-2009 04:45 PM  8 years agoPost 5
Duckster

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Brunei

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i just break in my YS50 and i start with 1.5 turn out and close it to 1.25 turn out after the 6 tank and found it really sweet, love to run it rich and main needle at 1.5 turn plus 2 click foud that the engine sweet spot at this tuning Engine Temp at 180 - 190 farenhite, still can see the fuel dropping on my muffler while hovering

Trex 600,700 AND 450, GY611, GY401, OS5H, OS91HZ, MGP, HS65HB, Scorpion 2221-8,

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