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Cant Get Upgraded Walbro Carb to Start? Suggestions Pls. Tks.

Discussion in 'Redcat Racing Rampage' started by Westsiderkg, Jan 11, 2018 at 10:17 AM.

  1. Westsiderkg

    Westsiderkg New Member

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    So…I’m frustratingly installing my 3rd 1107 carb now on my V3 MT and I am starting to believe it’s not the carbs, but something I am doing incorrectly and I could use a few suggestions from the group vets here.



    Getting good spark and fuel so that’s ruled out.



    Also, if I swap back to the factory 668….couple of pulls with the choke = pop, couple more pulls and turns over like a champ.



    I’m choking the 1107 the same as the 668, but not getting a “pop”, which I find odd?



    I can pull the 1107 until the cows come home and nothing…except the eventual good old flooded engine.



    Set the 1107 H needle to 1 7/8 per DDM guidance, +/- ¼ turn…and the L needle to 1 5/8 +/1 ¼ turn.


    Nothing, I mean nothing! It’s like the 1107’s are DOA.



    I read on another forum a member said to try starting w/o priming the bulb. Not sure what that will really do, but I will try that and report back.



    Yet another thread suggesting setting the H / L to 3 full turns to clean out any residue. Tried that as well, nothing.



    I also tried blipping the throttle a little while starting and not the faintest sound of wanting to start with the 1107.



    Surely there is a trick that I am missing here???



    Thanks for the assistance everyone.
     
  2. Phill2

    Phill2 Well-Known Member

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    Are you leaving the choke on hoping for a pop?
    Use the choke for 2 pulls only then turn it off regardless or it will flood.
    I find the 1107s run very rich so you may have to lean it off a bit.
     
  3. Westsiderkg

    Westsiderkg New Member

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    Thanks I'll try to lean it out a little.

    Yes only using choke for a couple pulls.
     
  4. MARLEY76

    MARLEY76 Well-Known Member

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    westsiderkg i agree with phill2. everytime you pull the starter its adding more fuel to engine in return makes it flood . wich that alones a pain in the $%rse... why are you swapping carbs over if the old one works fine ?...
     
  5. Phill2

    Phill2 Well-Known Member

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    You can always give it a squirt of starter fluid through the air filter.
    That'll get her going then you can tune it from there.
     
  6. Phill2

    Phill2 Well-Known Member

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    If it's a 32cc it should have an 1107 stock.
     
  7. Westsiderkg

    Westsiderkg New Member

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    I thought the stock was a 668????
     
  8. Westsiderkg

    Westsiderkg New Member

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    Swapping for performance. It's the 32cc.
     
  9. Phill2

    Phill2 Well-Known Member

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    Nope 1107 on 32cc
    668 on smaller engines
     
  10. MARLEY76

    MARLEY76 Well-Known Member

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    oh see!! ive learnt something new here didnt know the bigger the cc the engines are. the carbs are diffrent spec.. im ok then phill2 as ive recently rebuilt my engine to a 29cc 4bolt bigbore kit with brandnew 997 walbro carb seems to run fine tho....
     
  11. Phill2

    Phill2 Well-Known Member

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    Yep 997 and 668 are the same carb.
    I run a 668 on my 29 too.
    I tried an 1107 on it but it just bogged all the time.
     
  12. MARLEY76

    MARLEY76 Well-Known Member

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