OS FS-91 Idle settings problem  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> O.S. Engines Support >> OS FS-91 Idle settings problem
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OS FS-91 Idle settings problem - 1/25/2004 2:01:33 AM   
yrusso


 

Posts: 1
Joined: 10/21/2003
From: Curitiba, BRAZIL
Status: offline 		Can someone help to solve the following problem?? I have bought a used OS FS-91 4-Stroke,
but it idle setting is not good. I can not get an idle under 3400 r.p.m. I have turned the
idle mixture screw clockwise almost to the end and the idle setting still seems to be rich.
On the other hand, I am able to get a very good high settings and the engine is not loosing
power.


Many Thanks - Yves Russo
       Post #: 1

RE: OS FS-91 Idle settings problem - 1/26/2004 3:41:36 PM   
Bax


 

Posts: 12677
Joined: 4/26/2002
From: Champaign, IL, USA
Status: offline 		Check the valve/rocker arm clearances. Then "ball park" the carb per the instructions. If you don't have them, email us at the address below to get a set emailed back.

If the carb's set correctly, and the valve lash is correct, then the compression seal is starting to go. When an engine starts wearing out, idle and acceleration are the first things to go south.

_____________________________

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

(in reply to yrusso)
       Post #: 2

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> O.S. Engines Support >> OS FS-91 Idle settings problem
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