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PauloG · 05-08-2012, 06:42 AM

Hi There,

I bought a used 700N. Yes! So freaking happy and excited

.

This is my 1st 700 and 1st Nitro period. So, lots to learn here.

My 700 arrives today and it comes with an OS91HZ-R engine. I want to read the manual and went to the OS website to download it. I noticed there were other OS91 engines.

Could someone please help me understand the difference between these engines?

As always, thanks to the HeliFreak community!

- MAX-91HZ-R
- MAX-91RZ-H RING
- MAX-91RZ-H DH RING
- MAX-91HZ
- MAX-91HZ-PS

Stevendavis · 05-08-2012, 08:06 AM

Congrats!!
I've got a couple gallons through mine now and its my favorite!

latte · 05-08-2012, 07:55 PM

Congrats!

MAX-91HZ-R is kinda new, its very similar to MAX-91HZ, but it has a pressure-regulator on the carburetor.

MAX-91HZ is perhaps the most used engine in the 700N. So popular in fact that Align also sells one that is similar in every way.

nitro burner · 05-09-2012, 12:04 AM

You will love the 700, The OS 91HZ-Regulator tunes a little different from the 91HZ which works off muffle pressure.
Let us know how she flys.

weaselbean · 05-12-2012, 04:24 PM

The HZR is very touchy on the needls the HZ not as touchy but still one to three clicks max when tunning

05-08-2012, 06:42 AM	#1 (permalink)
PauloG Registered Users Join Date: Aug 2011	My 1st 700N Hi There, I bought a used 700N. Yes! So freaking happy and excited . This is my 1st 700 and 1st Nitro period. So, lots to learn here. My 700 arrives today and it comes with an OS91HZ-R engine. I want to read the manual and went to the OS website to download it. I noticed there were other OS91 engines. Could someone please help me understand the difference between these engines? As always, thanks to the HeliFreak community! - MAX-91HZ-R - MAX-91RZ-H RING - MAX-91RZ-H DH RING - MAX-91HZ - MAX-91HZ-PS __________________ Goblin 700, Goblin 380, Gaui NX7, T-Rex 700N, T-Rex 450 iKon, because I am connected to my heli. Are you connected to yours? RCHN #15

05-08-2012, 08:06 AM	#2 (permalink)
Stevendavis Registered Users Join Date: Oct 2009	Congrats!! I've got a couple gallons through mine now and its my favorite! __________________ Blade MCP-X Brushless, 300CFX, , Trex 450 Pro v2, Trex 600 ESP 6s 3GX v.3.1 and KDE head, Rotormast V-22, Futaba 12Z controle!!

05-08-2012, 07:55 PM	#3 (permalink)
latte Registered Users My HF Map location Join Date: Jun 2008	Congrats! MAX-91HZ-R is kinda new, its very similar to MAX-91HZ, but it has a pressure-regulator on the carburetor. MAX-91HZ is perhaps the most used engine in the 700N. So popular in fact that Align also sells one that is similar in every way. __________________ 700E DFC - Ikon 700N FBL - Ikon

05-09-2012, 12:04 AM	#4 (permalink)
nitro burner Registered Users My HF Map location Join Date: Jun 2004	You will love the 700, The OS 91HZ-Regulator tunes a little different from the 91HZ which works off muffle pressure. Let us know how she flys. __________________ T-Rex 450 Pro FBL ZYX,T-Rex 700 Nitro FBL BEASTX,T-Rex 700 Nitro FBL BEASTX Spektrum DX8,AMA#849731

05-12-2012, 04:24 PM	#5 (permalink)
weaselbean Registered Users My HF Map location Join Date: Feb 2010	The HZR is very touchy on the needls the HZ not as touchy but still one to three clicks max when tunning __________________ "Quit crying about your airplane and fly it already!"

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