RE: os 91 in U-CAN-DO  
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    • All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> RE: os 91 in U-CAN-DO
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    RE: os 91 in U-CAN-DO - 10/2/2003 7:07:28 PM   
    Spicoli


     

    Posts: 474
    Joined: 1/31/2002
    From: TERRACE, BC,
    Status: offline     		A 91fx is more like 24 oz's with the stock muffler.

    (in reply to OldRookie)
           Post #: 126

    RE: os 91 in U-CAN-DO - 10/3/2003 12:49:57 AM   
    maxtenet



    Posts: 707
    Joined: 10/18/2002
    From: Towson, MD, USA
    Status: offline     		Enough with this thread already!

    Max

    (in reply to Spicoli)
           Post #: 127

    RE: os 91 in U-CAN-DO - 10/3/2003 5:39:20 PM   
    FLYBOY



    Posts: 8691
    Joined: 1/7/2002
    From: Missoula, MT, USA
    Status: online
    quote:

    ORIGINAL:
    Enough with this thread already!



    I couldn't believe that there were that many replies, but there has been some great info in this thread by many people and they seem to be giving good info.

    The mods can close it if they like, but it seems to still be a good live thread.

    _____________________________

    Fly it till the wings come off.

    (in reply to maxtenet)
           Post #: 128

    RE: Another wasted evening with the OS 91FX - 10/3/2003 6:21:11 PM   
    Strykaas



    Posts: 4107
    Joined: 3/21/2003
    From: Paris, FRANCE
    Status: online     		I totally agree.

    _____________________________

    ProBro #2077
    http://image2-0.rcuniverse.com/e1/forum/upfiles/57402/Nl29490.jpg

    (in reply to FLYBOY)
           Post #: 129

    RE: Another wasted evening with the OS 91FX - 10/3/2003 10:02:39 PM   
    nedyob


     

    Posts: 1231
    Joined: 2/5/2002
    From: NORTHWOOD, IA, USA
    Status: offline     		I guess if OS wont figure out the problem with the remote needle valve issue, then someone else should. I thought thats what everyone was trying to do here. I think the thread should stay open.
    NEDYOB

    < Message edited by nedyob -- 10/3/2003 4:04:04 PM >

    (in reply to Strykaas)
           Post #: 130

    RE: Another wasted evening with the OS 91FX - 10/3/2003 11:59:55 PM   
    2thelmt



    Posts: 102
    Joined: 12/28/2001
    From: Acton, ON, CANADA
    Status: offline     		Since there is no reply in the manufactures forum from beto9 's thread, we have to do this ourselves-KEEP IT OPEN. If O.S. can't address the problem, we, as a collective have to do it or else we have $300.00Can PAPERWEIGHTS.
    This is my first O.S. engine, and I am not impressed. I will not think of O.S. as a "Premium Brand" anymore. There are many manufacturers out there that can do the job(out of the box)-CHEAPER.
    Ian

    _____________________________

    "The only way of discovering the limits of the possible is to venture a little way past them … into the impossible.&q

    (in reply to nedyob)
           Post #: 131

    RE: Another wasted evening with the OS 91FX - 10/4/2003 1:42:53 AM   
    rajul



    Posts: 6290
    Joined: 6/18/2002
    From: Missouri City, TX, USA
    Status: offline     		I have not used TT or Webra, but they are also using remote needle valves. Do these engines have bubbling issues as well ? If not, then what is the difference between them and OS ?

    _____________________________

    Mike Marks
    RCU Moderator
    Aerofly Support Representative http://www.aerofly.com/index.html

    (in reply to 2thelmt)
           Post #: 132

    RE: Another wasted evening with the OS 91FX - 10/4/2003 2:47:56 AM   
    FLYBOY



    Posts: 8691
    Joined: 1/7/2002
    From: Missoula, MT, USA
    Status: online     		I have the 46 FX and it is fine. I run TT but it has the needle in the carb, as does my webra. I have to think it is just the 91 that is having this problem. I just ordered two more 46 FX engines for a twin I am building. I hope they run as good as the one I have.

    Sure wish that 91 FX worked. It would be a great engine. I just don't trust it any more. I bought two and was going to put them in my super duellist. I have one new in the box I will never run. Trying to decide what to do with it. I don't want to go through all the sending it back and forth if it does the same thing. Just a bit gun shy now on it.


    _____________________________

    Fly it till the wings come off.

    (in reply to FLYBOY)
           Post #: 133

    RE: Another wasted evening with the OS 91FX - 10/4/2003 2:55:54 AM   
    rajul



    Posts: 6290
    Joined: 6/18/2002
    From: Missouri City, TX, USA
    Status: offline     		Hi flyboy, did you consider using two 50SX rather than 46fx ?

    _____________________________

    Mike Marks
    RCU Moderator
    Aerofly Support Representative http://www.aerofly.com/index.html

    (in reply to FLYBOY)
           Post #: 134

    RE: Another wasted evening with the OS 91FX - 10/4/2003 3:04:09 AM   
    FLYBOY



    Posts: 8691
    Joined: 1/7/2002
    From: Missoula, MT, USA
    Status: online     		No, actually, I have a 46 FX and it runs great, so I am hoping the other two do too. That will over power the plane I am bashing into a twin, and they will work good on my DC 3 as well. I didn't even look at the 50. Should have probably, but didn't.


    _____________________________

    Fly it till the wings come off.

    (in reply to FLYBOY)
           Post #: 135

    RE: Another wasted evening with the OS 91FX - 11/1/2003 4:38:40 PM   
    Jmak1


     

    Posts: 16
    Joined: 2/24/2003
    From: Richland, WA, USA
    Status: offline     		I had the same type problem on an aeroworks 540 and had to use a perry fuel punp to get it running steady, It worked!

    (in reply to Throttle)
           Post #: 136

    RE: Another wasted evening with the OS 91FX - 11/1/2003 6:26:08 PM   
    rcplane-RCU


     

    Posts: 56
    Joined: 11/14/2002
    From: Bella Vista, CA, USA
    Status: offline     		I see that this post is old but did you get your OS 91FX to run? I have several and they are all great, never die etc... I did however have a problem with one, it was upside down. Is yours upside down? I have no majic answers but I could not make mine run upside down and all other OS FX motors are perfect(for me) Mike

    (in reply to FLYBOY)
           Post #: 137

    RE: Another wasted evening with the OS 91FX - 11/2/2003 3:53:54 AM   
    FLYBOY



    Posts: 8691
    Joined: 1/7/2002
    From: Missoula, MT, USA
    Status: online     		Don't know what it was mike, but mine, and 2 other friends had the same problem. OS took mine and worked a deal with me on other engines, and I sold the second one I bought without trying it. Didn't want to go through it again. One of my friends tried the second one after OS rebuilt the first and it didn't work, but the new one does the same thing. They are mounted upright. Don't know what the deal is. bummer, it would have been the perfect engine for many of my planes. Haven't decided what I am going to do next. I was hoping OS would come out with a good fix, like putting the needle back in the carb where it belongs. I am gunshy on them right now. I won't buy another one with remote needle unless I absolutly have to. The 46 FX has the same type setup and seems to run ok, but I don't like the rear needle. It is unfortunate that they think everyone should run the needle there. I believe it gives some a false sense of security. I don't believe it is any safer. If a bonehead is going to stick his fingers in the prop, he is still going to do it with the rear needle. I really hate trying to plumb it back there and fill the tank.

    Glad yours work well. They would be a perfect engine for many planes. I bought two when I saw them, but unfortunately, this happened.

    I sure like the way OS handled the situation though. They are first class!

    _____________________________

    Fly it till the wings come off.

    (in reply to rcplane-RCU)
           Post #: 138

    RE: Another wasted evening with the OS 91FX - 11/2/2003 4:13:51 AM   
    skychief666



    Posts: 31
    Joined: 10/6/2003
    From: River City, TX, USA
    Status: offline     		My 91 is running fantastic...the only issue's I have are the heat and the vibration, but all my other single cyl. 2 strokes vibrate to some degree also but just not as bad as the O.S. 91FX.
    I did an extra long break in on a test stand(1gallon) and never saw bubbles so I figured once in the plane it would bubble like crazy...guess I got lucky...no bubbles at all in either line coming from the tank ot to the carb. I am also using medium fuel line and no pump. I am using Omega 15% fuel and an APC 13/8 prop and it is very strong with this combp...guess I got lucky again.

    To The moderators...don't kill this thread...it has been doing what all threads should do...( share information )!!!!!


    _____________________________

    CWH
    ESQUIRE

    (in reply to FLYBOY)
           Post #: 139

    RE: Another wasted evening with the OS 91FX - 11/2/2003 12:41:36 PM   
    Flypaper 2



    Posts: 4308
    Joined: 3/29/2002
    From: Kingston, ON, CANADA
    Status: offline     		Seems like everyone who has mounted the needle valve assy on the firewall has the problem solved.

    _____________________________

    Gord
    Dreamed I was a muffler. Woke up exhausted.

    (in reply to skychief666)