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Mid 90's OS FS120 Surpass Break In - 10/10/2012 6:54 AM   
Warbird40


 

Posts: 271
Score: 105
Joined: 9/4/2012
Last Login: 5/14/2013
From: Moreno Valley, CA, USA
Status: offline 		I just purchased an unfinished plane with what appears to be a OS FS120 Surpass from the 90's and I would like to know what is the best way to break it in since it's never seen fuel. Also what kind of fuel do you recommend for break in and regular use after break in. What setting should I start with?
Thanks


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RE: Mid 90's OS FS120 Surpass Break In - 10/10/2012 3:18 PM   
Bax


 

Posts: 17283
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Joined: 4/26/2002
Last Login: 5/17/2013
From: Champaign, IL, USA
Status: offline 		To break in your old FS-120 Surpass, you want to use a fuel with 10%-15% nitro, either a fuel labelled for "2-stroke" or "4-stroke" engines. Open the high-speed needle about 1-1/2 turns if it's the pumped engine, and about 2-1/2 turns if it's a non-pumped engine. Open the throttle to full and choke the engine until fuel starts to "spit" out of the exhaust port. Un-choke the engine and briskly flip the engine several times to make sure it's clear. Apply the starter battery to the glow plug and apply the electric starter. If hand-flipping the engine to start it, flip it backwards against compression.

Once running, advance the throttle to full and run the engine as rich as possible without it quitting. You can leave the glow plug battery connected. Run the engine this way for at least 15-20 minutes. After that, you can lean the engine a bit at a time, progressing to peak RPM over the next 1/2-hour or so. If the engine will sustain running at a setting just rich of peak RPM, it's ready to fly.

_____________________________

Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: hobbyservices@hobbico.com

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All Forums >> Glow Engines, Gas Engines, Fuel &amp; Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> O.S. Engines Support >> Mid 90's OS FS120 Surpass Break In
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