3-w 100 back fires HELP

Discussion in 'Engines' started by Dadstoysbg, Apr 30, 2012.

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  1. Apr 30, 2012 #1

    Dadstoysbg

    Dadstoysbg

    Dadstoysbg

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    Looking for ideas. The history of the engine. Bobby at Cactus built the engine for me about a year before he sold out. It has has run flawless since.
    Took it out for the first time this year. choked it and it hit on the third flip. Open the choke it would run very ruff and then back fire and stop.
    checked everything i could think of. Sencer was in place and lock down. Nothing I tried would help and in fact the back fire got worse.
    any ideas are welcome. My thought is a bad ignition. I think it is a RCEXCEL but it has Cactus Aviation on it. Dennis
     
  2. Apr 30, 2012 #2

    roc111672

    roc111672

    roc111672

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    Give Richard at WrongWayRc.com a call he can fix you up with an ignition if you need it .
     
  3. Apr 30, 2012 #3

    BENCHASON

    BENCHASON

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    Bad ignition is my vote too brother.
     
  4. Apr 30, 2012 #4

    Vital-Rc

    Vital-Rc

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    How do you have it hooked up? Did it work before the smart fly install?
    What battery voltage?
     
  5. Apr 30, 2012 #5

    Dadstoysbg

    Dadstoysbg

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    Juston this is my old 260. no smart fly. Dennis
     
  6. Apr 30, 2012 #6

    Jaybird

    Jaybird

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    Wishin' I was at the farm

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    That's about the same thing your 3dub did when the ignition quit.
     
  7. Apr 30, 2012 #7

    Dadstoysbg

    Dadstoysbg

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    So far it looks like a bad ing. Have one on the way. whats a pisser is that yesterday was such a great flying day nothing i had worked. One flight on Suk and the tail wheel broke and the ing. failed on the other plane. Dennis
     
  8. Apr 30, 2012 #8

    Jaybird

    Jaybird

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    Wishin' I was at the farm

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    Those days suck! Get to the field and nothing in the trailer works.
     
  9. Apr 30, 2012 #9

    BENCHASON

    BENCHASON

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    Or like it was for us yesterday, two mid-air's with the ground.
     
  10. Apr 30, 2012 #10

    Vital-Rc

    Vital-Rc

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    Dennis is you need to fly I have some in stock.
     
  11. Apr 30, 2012 #11

    Dadstoysbg

    Dadstoysbg

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    thanks chad on the way with his spare. Will try it to make sure that is my problem. Dennis
     
  12. Apr 30, 2012 #12

    TManiaci

    TManiaci

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    :WTF: Where's the PICTURES!
     
  13. Apr 30, 2012 #13

    carykard

    carykard

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    On the farm thread
     
  14. May 1, 2012 #14

    BVargas

    BVargas

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    did you Check the connectors on the ignition unit and the switch to see if you have a broken wire? about a 50 cent fix if you have a broken wire at a connector :)

    BV
     
  15. May 1, 2012 #15

    aussiesteve

    aussiesteve

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    I had almost exactly the same thing happen to one of my planes on the weekend. (Not a 3W but an RCExcel ignition was firing the engine). It was a bad ignition battery (4 cell eneloop pack). The pack was charged before going to the field and it was only about 6 months old but sometime **** happens. The pack has now been disposed of and a new one fitted and all is sweet again.
     
  16. May 8, 2012 #16

    Dadstoysbg

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    The battery is new. I got another ing. new and tried it this week-end. Hit on the second flip with the chock on. i thought this is the fix. Opened the chock and set fast idle. three flips and the engine started but ran rough as a cob. then it back fired again and threw the prop across the runway. It pulled all 6 bolts out of the hub. now I either has to use hele coils or replace the hub. Not to mention a new prop. Some times I hate the spring, trying to these things ironed out.
    Maybe I should just send it in and let someone else fix it. Sundays are for flying not working on sh+++t. Dennis

    just got off the phone with AI and he thinks the hub may have moved. So i guess he gets the engine after he gets back from JoNall. If he's right it won't cost much to get my engine back in the air. Dennis
     
    Last edited: May 8, 2012
  17. May 8, 2012 #17

    Bunky f. knuckle

    Bunky f. knuckle

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    Cover shot, MA 10/09!!!

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    Damn............... That sucks!!!! Could go to a 6mm screw, as well, no heli coil.
     
  18. May 8, 2012 #18

    Bunky f. knuckle

    Bunky f. knuckle

    Bunky f. knuckle

    Cover shot, MA 10/09!!!

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    Gerhard will fix it up. There is a real small woodruff key in the crankshaft that the drive hub slips on, and it is very possible that the key has sheared. Even if the prop mounting holes are boogered, he will put a new hub on, and re-time the engine and give it a good run and send it back to ya.
     
  19. May 8, 2012 #19

    Dadstoysbg

    Dadstoysbg

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    Your right. don't have time to tinker with a engine when I need to fly. On top of having a engine down I have to put new gears in my 8711's Sat.
    I have to finish up the wing for the high school class. The competition is next Monday. Dennis
     
  20. May 9, 2012 #20

    Vital-Rc

    Vital-Rc

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    Dennis take a se112 off the shelf and go fly that thing!
     

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