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  1. #1001

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    RE: RCAero JC Engines & YDA Engines

    is there a trick to getting a new carb to pull fuel from the tank? even with the choke closed i don't seem to be pulling fuel.
    can i pump fuel from my storage tank into the fuel nipple on the engine?
    thanks,
    bart
    build fly rebuild

  2. #1002

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    RE: RCAero JC Engines & YDA Engines

    Hey Bart -

    It is a new dry carb. I had the same problem the first time. You can try to prime it with some fuel straight to the carb as you suggested. That will help the suction. And then flip flip flip. You are probably at very LOW risk of flooding, so flip with prejudice

    Once you get it going the first time, it is an EASY starting engine though

  3. #1003
    apalsson's Avatar
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    RE: RCAero JC Engines & YDA Engines


    ORIGINAL: barchiola

    is there a trick to getting a new carb to pull fuel from the tank? even with the choke closed i don't seem to be pulling fuel.
    can i pump fuel from my storage tank into the fuel nipple on the engine?
    thanks,
    bart
    Bart,

    This is relatively common with new carburettors. They are good at pumping gas but absolutely poor at pumping air

    Pumping directly into the fuel nipple on the engine will not work because of the way the carburettor works.
    You can squirt a bit of fuel into the throat of the carby - that might get it pumping. If that doesn't work, take the membrane cover of the carburettor (it's the one with a single big screw in the middle) and let the fuel seap in till it floods the membrane.
    Just be very careful not to to dislodge the membrane when you put the cover back on. This will absolutely get the carby pumping

  4. #1004

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    RE: RCAero JC Engines & YDA Engines

    Hey,

    I found that if you rock the prop back and forth real fast (BDC) between compression strokes that seemed to help my dry carb pump bring fuel to the carb.

  5. #1005

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    RE: RCAero JC Engines & YDA Engines

    thanks for the suggestions guys. i took some slack out of the fuel lines inside the plane and then had another go at it. after filling the tank i filled the fuel line from the carb back to the tank to purge the air, flipped the prop a few times with the choke closed, flipped a few more with ignition on then opened the choke when it kicked. it started and idled pretty well but needed to have the high end opened up a little to hold the top end. so far, so good. i'm hoping to fly it saturday and then enjoy it for years to come. the muffler i made isn't muffling very much but that's ok, airplane noise is good noise.
    thanks again for the help.
    bart
    build fly rebuild

  6. #1006
    Tseres's Avatar
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    RE: RCAero JC Engines & YDA Engines


    ORIGINAL: mjohnst3

    Hey,

    I found that if you rock the prop back and forth real fast (BDC) between compression strokes that seemed to help my dry carb pump bring fuel to the carb.

    Ditto.

    I also found this useful when I stick the plane on the shelf for a month and don't start it for a while.
    Another thing that I noticed that if you leave some fuel in the overflow tube then it it is also harder to suck up the fuel to the carb. Once you start the engine then you don't have to worry about it till you let *** sit on the shelf for a while again.
    Old Tom

  7. #1007

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    RE: RCAero JC Engines & YDA Engines

    Another thing that you guys can do is pull the plugs on a new engine and put a starter on the motors. This will help pull fuel into the carb once you have the fuel into the carb put the plugs back in and fire the motor up.

  8. #1008

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    RE: RCAero JC Engines & YDA Engines

    I finally got a chance to have a look and found what seems to be the lack of a retainer as you thought. I am going to try and post a picture on here, never done that before so bare with me. Take a look and tell me if I am looking at this correctly. Thanks all.
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    Too much power is just right!

  9. #1009
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    RE: RCAero JC Engines & YDA Engines

    Hey Mike
    PM sent.....

    Cheers
    Henry
    RC Aero Products LLC - Home of the YD Aero & JC Engines, HiFly Models, XOAR Propellers
    www.rcaer.com Tel: 888.239.8593

  10. #1010

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    RE: RCAero JC Engines & YDA Engines

    folks,
    i was at the field with my akromaster/yda56 combo and i couldn't fly because my quick fueler was leaking badly. i'm going to scrap it and put a T in the clunk line from the tank to the carb and use a fuel dot to fill. does the throttle have to be pulled all the way back to idle cutoff to keep fuel from getting into the carb when i'm filling up the tank?
    maybe i'll fly tomorrow if i can sneak out after pee-wee football.
    bart
    build fly rebuild

  11. #1011
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    RE: RCAero JC Engines & YDA Engines

    No
    Attended the CutFinger Institute of DirtNap University for years but never did graduate....
    Recipient, Mangledhand award August 2008
    Club Saito Member #7
    Original AMA #31261

  12. #1012
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    RE: RCAero JC Engines & YDA Engines

    The fuel will not flow into the engine unless you can develop more pressure than what the pop off pressure is set at when you are pumping in the fuel. This is something which shouldn't happen.
    Quote: Hey, who put that tree there?
    Ultra Sport brotherhood #125
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  13. #1013

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    RE: RCAero JC Engines & YDA Engines

    the new yda56 ran great and i had the immense pleasure of finally flying my new plane.
    thanks for the help,
    bart
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    build fly rebuild

  14. #1014

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    RE: RCAero JC Engines & YDA Engines

    Henry,
    Any new news on the engines? Still waiting patiently for the 38. I saw that you took the planes link from your site. Hope everything is going OK.
    Stangevil29
    Stangevil29

  15. #1015
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    RE: RCAero JC Engines & YDA Engines

    I got my engine mounted on the Sboch but I have some clearance issues with the pitts muffler on the front of the cowl. I'll hack it off and weld it up tomorrow and post some finished pictures for you.
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    Old Tom

  16. #1016
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    RE: RCAero JC Engines & YDA Engines

    I like the choke lever mount/brace.

    Hi, I\'m FHM and I suffer from terminal tinkeritus.

  17. #1017
    Tseres's Avatar
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    RE: RCAero JC Engines & YDA Engines


    ORIGINAL: fhm101

    I like the choke lever mount/brace.

    Thanks. Here are a few pictures on the way it works. It is spring loaded so you just push on it and lick it in with the throttle.
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    Old Tom

  18. #1018
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    RE: RCAero JC Engines & YDA Engines

    The way it ties the upper and lower engine mount together it looks like it might offer some additional strength to the mount as well.
    Hi, I\'m FHM and I suffer from terminal tinkeritus.

  19. #1019

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    RE: RCAero JC Engines & YDA Engines

    Very Nice install Tom. What did you use to make the choke mount. Also did you make those standoff or buy them somewhere.

  20. #1020

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    RE: RCAero JC Engines & YDA Engines

    Tom was away for a while....I knew he had to be up to something.

  21. #1021

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    RE: RCAero JC Engines & YDA Engines

    steve,
    would you happen to have a spare 56cc prop hub laying around? i stripped one of the bolt holes on mine. it's aluminum, no?
    thanks,
    bart
    build fly rebuild

  22. #1022
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    RE: RCAero JC Engines & YDA Engines

    Use one of these to install props.

    Wood 50-55 inch ounces.

    Composite 65 inch ounces.

    http://www.harborfreight.com/1-4-qua...ench-2696.html

    Comes in a red heavy duty case. Fits in my gasser field box.

    You will not regret the purchase. Very nice for the price.



    DR

  23. #1023
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    RE: RCAero JC Engines & YDA Engines


    ORIGINAL: barchiola

    the new yda56 ran great and i had the immense pleasure of finally flying my new plane.
    thanks for the help,
    bart
    Hi Bart,

    I really like the look of your Akromaster.
    Who makes those planes?

  24. #1024

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    RE: RCAero JC Engines & YDA Engines


    ORIGINAL: apalsson


    ORIGINAL: barchiola

    the new yda56 ran great and i had the immense pleasure of finally flying my new plane.
    thanks for the help,
    bart
    Hi Bart,

    I really like the look of your Akromaster.
    Who makes those planes?

    thanks! it was made from an Air Tech kit in the early eighties. i bought it off of craigslist and recovered it. i haven't seen any other kits in over a year since buying this built up example. it flies really nicely, i'm very happy with it.
    bart

    build fly rebuild

  25. #1025
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    RE: RCAero JC Engines & YDA Engines


    ORIGINAL: plane addicts

    Very Nice install Tom. What did you use to make the choke mount. Also did you make those standoff or buy them somewhere.
    I used some Aluminum flat stock from the hardware store. Shaped it with a belt sander.
    The standoffs came from my 26 that was in a box on the bench. They were longer then the ones that came with it. I needed 3 1/4" long. These were just over 2 3/4". 1/2" spacer made from Ply made them the perfect length.
    Old Tom


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