OS 48 Surpass  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> OS 48 Surpass
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OS 48 Surpass - 5/30/2008 5:15:16 PM   
jsflysrc


 

Posts: 9
Joined: 8/6/2004
From: New Westminster, BC, CANADA
Status: offline 		Does anyone know if the OS 50 2-stroke piston ring will fit the OS48 4-stroke (Surpass)? The OS48 is discontinued.
       Post #: 1

RE: OS 48 Surpass - 5/30/2008 5:23:38 PM   
w8ye



Posts: 17492
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: offline 		The OS 52 four stroke piston ring will fit the OS 48 four stroke. They both have the same piston.

Most people on here buy their rings for any engine from Frank Bowman in New Mexico for half the price

Frank C Bowman
1211 N Allen Ave
Farmington, NM 87401-3568
505-327-0696
ringmaster46@msn.com


Here's the part on Tower's site

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXCT37&P=7

While you are at it, did you know that the carburetor from a OS 52 or the Magnum 52 will bolt right up to the 48? The newer carbs are twin needle instead of air bleed.

< Message edited by w8ye -- 5/30/2008 5:33:33 PM >

_____________________________

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

Club Saito Member #7
Original AMA #31261

(in reply to jsflysrc)
       Post #: 2

RE: OS 48 Surpass - 7/25/2008 3:40:07 AM   
chistech


 

Posts: 84
Joined: 9/20/2007
From: south dartmouth, MA, USA
Status: offline 		I rebuilt my 48 in exactly the same manner. I used a Frank Bowman ring, new bearings and a Magnum carb. It has now been rebuilt about a year and I have about 50, ten or twelve minute flights on it now. I have always run it rich and have finally leaned it out to just below max rpm's. Wow, does this thing run good. I have it in a Kyosho spitfire and it is really moving out now. It's performance was sufficient when it was rich but now it is awesome set just at max. My suggestion is to leave it rich for a long time to really break it in right. Franks' rings are great and will give you excellent performance from your engine. The Magnum carb will let you get a really good slow idle out of it and is really necessary if you invert the engine. Even now I tried the original carb and it doesn't like to idle to well inverted.

(in reply to w8ye)
       Post #: 3

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> OS 48 Surpass
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