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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › OS91 HZ-R 3D Speed, Factory Tuned?
05-11-2011 09:21 PM  7 years agoPost 1
bkervaski

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Birmingham, AL, USA

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Ok, this is different, the manual on the OS91 HZ-R 3D Speed says "Factory Tuned Engine" and the needles are pre-installed in the carb.

But the manual doesn't really say anything inside and looks copy and pasted just from the standard HZ-R.

Anyone know if these things are actually pre-tuned? Surely not.

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05-11-2011 09:26 PM  7 years agoPost 2
Paul Woodcock

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Dubai - United Arab Emirates

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Hi

I would assume that they mean balanced, ported, shimmed etc, etc when they say 'factory tuned'

I would never assume the needles are set..... there are too many variables like altitude, temperature, humidity, fuel viscosity, nitro content, oil content and type etc, etc.

regards
Paul

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05-11-2011 09:32 PM  7 years agoPost 3
bkervaski

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Birmingham, AL, USA

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Yea, I agree, but the needles were in and they aren't zeroed out, lol, I would have reset them anyway.

If it's not actually tuned (likely) then I guess they are going to have a lot of folks not tuning them and burning their motors up if the needles are just set in there.

The manual cover is a little misleading:

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05-11-2011 10:04 PM  7 years agoPost 4
airdodger

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Johnston USA

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Yes what pwood stated. Not meaning the needles are factory set.

Chris

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