YS63 Vs OS91  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> YS63 Vs OS91
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YS63 Vs OS91 - 12/14/2002 1:07:18 AM   
russ skinner


 

Posts: 74
Joined: 10/18/2002
From: Iver Heath, UNITED KINGDOM
Status: offline 		How do the above four strokes compare in terms of performance? I'm just about to start a new project and really like the appeal of the size + weight of the YS, but not sure if its performance is up to that of the OS.
       Post #: 1

YS63 Vs OS91 - 12/14/2002 10:41:21 AM   
Richard L.



Posts: 8775
Joined: 7/28/2002
From: Redmond, WA, USA
Status: offline 		They will be very close in terms of performance. The YS 63 is rated at 1.5 hp, and the OS 91 is rated at 1.6 hp, so it's up to your personal preference. The OS 91 might be cheaper in the long run because it doesn't require expensive YS 20/20 fuel.

(in reply to russ skinner)
       Post #: 2

YS63 Vs OS91 - 12/14/2002 10:56:09 AM   
w8ye



Posts: 17509
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: offline 		Y-S engines run rather well on 15% Power Master, Wildcat, Cool Power etc.

The OS Surpass II will run a lot better on 20-20 too.

The Saito 72 runs mighty close to the same as the Y-S 63.

Oh that Y-S 63 runs sooo smoooth and throttles soo welll.

Such low idle, never quits.

_____________________________

Attended the CutFinger Institute of DirtNap University for years but never did graduate....

Club Saito Member #7
Original AMA #31261

(in reply to russ skinner)
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YS63 Vs OS91 - 12/14/2002 11:04:02 AM   
Richard L.



Posts: 8775
Joined: 7/28/2002
From: Redmond, WA, USA
Status: offline 		Yep, the YS 63 is one awesome engine. I have one in a VQ Zero, and that thing just hauls a$$. The engine runs so good and has such a nice, stable idle. I also have two great running Saito 72's, one in a P-51D and the other in an ME-109 (they're in my gallery). Neither one of my Saito's come close to the performance of my YS 63.

(in reply to russ skinner)
       Post #: 4

YS63 Vs OS91 - 12/15/2002 3:25:06 AM   
russ skinner


 

Posts: 74
Joined: 10/18/2002
From: Iver Heath, UNITED KINGDOM
Status: offline 		Well I'm finally sold on the YS 63. What prop would you recommend and is the any preference for type of engine mount (I intend to mount my engine horizontal).

Thanks again.

(in reply to russ skinner)
       Post #: 5

YS63 Vs OS91 - 12/15/2002 4:32:05 AM   
Richard L.



Posts: 8775
Joined: 7/28/2002
From: Redmond, WA, USA
Status: offline 		I'm having good luck with a Graupner 12x7 prop spinning at 11,200 rpm. Any glass filled nylon engine mount will do.

(in reply to russ skinner)
       Post #: 6

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