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HomeRC & Power✈️Aircraft🚁HelicopterEngines Plugs Mufflers Fuel › Mid range needle valve setting OS 91 HZ eng?
03-31-2012 11:02 PM  7 years ago
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mr 60

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Bountiful, utah

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Mid range needle valve setting OS 91 HZ eng?
Hi Guys I need some help with the mid range needle valve setting on my OS 91 HZ engine? seems some where I read where most of the guys shut it off? I have 10 flight's on the engine and I have it set at 2 turns out, seems like to me it is time to crank it in a bit? I have started to lean the high end and the engine is running rich but makes good power, I fly at 4600' altitude thanks. Jim
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04-01-2012 12:21 AM  7 years ago
dchekas

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Farmington, CT

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HZ-R or HZ?

The HZ-R motor typically has the mid needle around 0.5-0.75 turns, usually.

The HZ I would expect to be 1.25-1.5 turns out on the mid.
Team Align, Team Futaba, Team Byron Fuels, Team Thunder Power
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04-01-2012 08:25 PM  7 years ago
mr 60

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Bountiful, utah

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mid range needle valve setting
Thanks dchekas I was hoping I would get a few more opinions?
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04-02-2012 04:13 AM  7 years ago
Lamar Cooley

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Houma,La.,U.S.A.

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90-HZ mid range needle setting
Run my 2 HZ's and SZ's set at 1 turn open on the mid range.
South Louisiana at sea level,HOT,HUMID and BURNING 20 or 30 percent fuel.
Regards

Here when wanted.
There when needed.
Everywhere when looked for.
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