jett muffler on 91fx  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Jett Engineering Support >> jett muffler on 91fx
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jett muffler on 91fx - 7/9/2007 2:07:51 AM   
russm


 

Posts: 323
Joined: 8/6/2006
From: waukegan, IL, USA
Status: offline 		does jett make a muffler for the os91fx. i have this engine on my minnow and would like more rpm. thanks, russm
       Post #: 1

RE: jett muffler on 91fx - 7/9/2007 2:12:32 PM   
bob27s



Posts: 4637
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		Hi Russ,

Yes, the Jett-stream 10-15cc size muffler works great on the OS91FX. Many examples flying.

Prop selection and target rpm are a bit different than for the Jett 90L, but still great results.

On the Toni, you have to also order the Toni extention kit - allows the muffler to properly exit the cowl.

With that setup, I recommend a 12x8 or 12x9 prop. Try and target somewhere at or over 12,500 ground rpm.


_____________________________

Bob Brassell
Jett Engineering - Engine Mfg Support Forum Host

(in reply to russm)
       Post #: 2

RE: jett muffler on 91fx - 7/9/2007 2:21:07 PM   
russm


 

Posts: 323
Joined: 8/6/2006
From: waukegan, IL, USA
Status: offline 		what part number is the ext. kit? this engine is on a minnow.

(in reply to bob27s)
       Post #: 3

RE: jett muffler on 91fx - 7/9/2007 2:36:44 PM   
bob27s



Posts: 4637
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		No specific part number.......

Just ask for the Toni extention kit for the OS91FX

Word of note..... some folks have noted that the LONG (red) muffler tends to interefere with the fuselage on the Minnow, even with the extentions (I think it hits the landing gear). Since you are using the extention kit, the 90LX muffler may be a good alternate ----- that one is shorter and does not hit the fuselage/gear


quote:

ORIGINAL: russm

what part number is the ext. kit? this engine is on a minnow.




_____________________________

Bob Brassell
Jett Engineering - Engine Mfg Support Forum Host

(in reply to russm)
       Post #: 4

RE: jett muffler on 91fx - 7/9/2007 2:43:52 PM   
russm


 

Posts: 323
Joined: 8/6/2006
From: waukegan, IL, USA
Status: offline 		the js90 muffler? thanks for the help bob, russ

(in reply to bob27s)
       Post #: 5

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Jett Engineering Support >> jett muffler on 91fx
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