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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › OS 105HZ vs OS 105 HZ-R
10-11-2012 11:25 AM  5 years agoPost 1
jonathancassar

rrApprentice

Mtarfa, Malta - Europe

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I'm about the swap over my old OS 91HZ engine to the new OS 105. Which engine between the OS 105HZ and the OS 105 HZ-R would you guys recommend in terms of reliability and performance from experience?

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10-12-2012 03:16 PM  5 years agoPost 2
P Andreoli

rrApprentice

new york

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i would go with the 105HZR. i have been using this motor in my helis for about half a year and i absolutely think it is the best and most consistent motor out there.

-cant go wrong with either one but in my opinion the Hzr is the way to go!

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10-12-2012 03:28 PM  5 years agoPost 3
unclejane

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santa fe, NM, USA

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The only difference is the carb and the backplate (HZ doesn't have the crankcase pressure fitting). The HZ would be what you'd want if you're using some externally pumped system or prefer muffler pressure, etc. The HZ-R has the on-demand regulator and a fitting in the engine backplate plus a check valve for pressurizing the tank.

I personally prefer the regulator system - it's the first and so far only pump/regulator system that OS has ever come up with that actually works right and it works very well. Hopefully OS will stick with it. Well worth the extra money for it...

LS

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10-14-2012 02:30 AM  5 years agoPost 4
marc8090

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Long Island, N.Y.

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+3 for the HZ-R version.

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10-14-2012 10:35 AM  5 years agoPost 5
gouki

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philippines

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+1 on the HZ-R. it will run more consistent regardless of fuel level and is noticeably stronger

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