What is the part number for the most updated needle valve for a 91FX  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> O.S. Engines Support >> What is the part number for the most updated needle valve for a 91FX
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What is the part number for the most updated needle val... - 7/7/2008 3:19:47 PM   
wjbender


 

Posts: 30
Joined: 7/18/2007
From: tinton falls, NJ, USA
Status: offline 		Bill Baxter , I have an OS 91FX that exhibits all the problems detailed here in great length related to the needle valve assembly cast as part of the rear engine cover. Here is a picture of what I believe is the updated version that helps fix the problem.
I asked my LHS to order a new cover and needle assembly, but it still had the needle valve holder cast as part of the cover???? The new one has a composit needle valve assembly attached with a steel bracket that screws to the back cover or can be mounted to the firewall. I am willing to give this engine one more chance to live if I can get the correct part.

As a reference, here is the part I ordered based on this response from you in an earlier posting, but this part looks the same as what I have although it did have the composit needle valve holder, but still cast as one with the back cover.
==================================================

If you have the old needle assembly, changing the o-rings won't cure the problem. The needle can have problems being heated by the engine, which causes fuel vapor bubbles in the fuel line. These make the engine go lean. A full conversion is:

OSMG4147 29507000 COVER PLATE ASSY 91FX US$40.99

This includes everything you need to convert the engine to the new needle assembly...rear cover, needle mount, and needle valve assembly.

Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA

===================================================


Thanks Bill Bender


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       Post #: 1

RE: What is the part number for the most updated needl... - 7/7/2008 7:22:34 PM   
Bax


 

Posts: 12457
Joined: 4/26/2002
From: Champaign, IL, USA
Status: offline 		How old was that prior posting? The one you got was a first revision.

Here's what you need for the current version:

OSMG6997 26582900 VALVE ASSY 40-65LA US$21.99
OSMG7152 26582931 NEEDLE STAY 91FX 65LA US$3.49
OSMG4078 29057000 COVER PLATE 91SX-H US$16.99

These parts can be ordered through any hobby retailer who sells O.S. Max engines and accessories.

_____________________________

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 wjbender)
       Post #: 2

RE: What is the part number for the most updated needl... - 7/7/2008 7:47:41 PM   
wjbender


 

Posts: 30
Joined: 7/18/2007
From: tinton falls, NJ, USA
Status: offline 		Thanks Bill,


Is the version shown in my photo the correct version? What is different? I hate to have the LHS order the worng thing again.


(in reply to Bax)
       Post #: 3

RE: What is the part number for the most updated needl... - 7/10/2008 3:47:39 PM   
Bax


 

Posts: 12457
Joined: 4/26/2002
From: Champaign, IL, USA
Status: offline 		Your picture shows the current version needle installation.

_____________________________

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 wjbender)
       Post #: 4

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> O.S. Engines Support >> What is the part number for the most updated needle valve for a 91FX
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