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OS52FS Idle Adjust - 10/4/2012 8:00 PM   
KW_Counter


 

Posts: 1414
Score: 141
Joined: 2/11/2003
Last Login: 5/19/2013
From: Lake County, CA, USA
Status: offline 		Bax,

My OS52FS, 40N Carb, was running superbly until a hard landing in the weeds.
Now it won't transition from low to high.
The pinch test indicates the low end is to lean, dies instantly.
I am guessing something is clogging the air bleed hole.
I can't find the air bleed; where does the low end air enter the carb?

The diagram I have found does not indicate the low end adjustment
screw or the air intake.
http://downloads.hobbico.com/evpl/osm/ev44281000.pdf

Thanks for your help,
KW_Counter

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RE: OS52FS Idle Adjust - 10/5/2012 3:03 PM   
Bax


 

Posts: 17297
Score: 169
Joined: 4/26/2002
Last Login: 5/23/2013
From: Champaign, IL, USA
Status: offline 		There is no airbleed hole. The carburetor for your engine does not use an airbleed hole for idle mixture adjustment. There is a small screw next to the needle valve where you adjust the idle mixture. The air enters the carburetor through the venturi. On the exploded diagram of the carburetor, part #4, nozzle assembly, has the idle mixture adjustment.

If the engine won't transition from low to high, you'll need to check the entire fuel system to make sure it's OK, and then get the engine properly set. If a fuel passage has gotten something into it, then you'll have to clean the carb.

_____________________________

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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RE: OS52FS Idle Adjust - 10/5/2012 3:10 PM   
KW_Counter


 

Posts: 1414
Score: 141
Joined: 2/11/2003
Last Login: 5/19/2013
From: Lake County, CA, USA
Status: offline 		Bax,
Thanks!
KW_Counter

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       Post #: 3

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All Forums >> Glow Engines, Gas Engines, Fuel &amp; Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> O.S. Engines Support >> OS52FS Idle Adjust
Page: [1]





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