Carby carburetor flooding engine??!

Discussion in '2-Stroke Engines' started by gameshark39, Mar 11, 2008.

  1. gameshark39

    gameshark39 New Member

    Hi, i just got myself a new 50cc powerkingshop frame mounted engine, i installed it with no hassle. Ive been able to start the engine and ride it for almost 1 minute before the bike decides to either stall or just stop working. I have a feeling that the carb float is allowing too much gas into the engine and flooding it. Im not familiar with how to fix this so advice is appreciated.
     

  2. graucho

    graucho Active Member

    Hey gameshark, make sure you go through the introduce yourself. Then, is it getting spark, you shure you have the gas turned on, simple over looked stuff first? check everything else first. Then lets start by asking this.... do you have any carb experience? If not, we all can work through it here. Or, if your sure its a carb problem, and you can get a new one, and shipped for 20.00 thats a option also without digging into it. Ive done tons of carb work. Cars, motorcycles, mini choppers, HT's. With my 70cc and 80cc ive stopped messing with them for the price. Im not scaring you, there's no much to them inside. Totally your call.
     
    Last edited: Mar 11, 2008
  3. eltatertoto

    eltatertoto Guest

    ill give ya 3 things it might be.

    nipple for fuel line is dirty inside. (even 1 grain of sand will mess it up)

    clip is pinched for the float bowl, in between the bowl and the rest of the carb.

    ant 3 is yr engine might be tilted too far back, try tilting the front more down ant the back more up.

    let us know how it goes. those are the most common problems.
     
  4. eltatertoto

    eltatertoto Guest

    oh, and intro yourself its da rules :)
     
  5. cooltoy

    cooltoy Member

    Did you use a fuel filter because if you did not, I'd bet that is your problem. It could be that when your bike sits, it has time to fill up the carb. That gives you enough gas to drive about one minute or so. If i am right, there is a bit of dirt stuck in the carb and would not take more than ten minutes to fix. Start by removing the gas line from the carb to see if gas flows out of the fuel line. Eletertott (wow that was a mouthful) could be correct about the angle of the engine as well. To help you understand how a carb works, just have a look at the water tank of your toilet. It's the same in every way.
    We will get you through this, it's a simple problem, ask as many questions as you have,thats why we are here. Welcome to this site!
     
  6. gameshark39

    gameshark39 New Member

    thanks for all the input guys, i suspect that the bobber thingie is mispositioned as I assembled the carburetor in a hurry. I dont think theres any dirt thats accumulated in it since i installe the kit last night. Bike will start with excessive force (VERY EXCESSIVE) i gotta be going like 50 km/h pedaling for it to start. Ill reposition the bobber and repost if it starts working.

    Thanks everyone, oh and by the way my name's David and its a pleasure to post here.
     
  7. gone_fishin

    gone_fishin Guest

    there are many existing carburetor topics...read thru them to learn how to service your carby.

    after i corrected the spelling of "carburetor" some "similar threads" have appeared below :)
     
  8. The Happy Time carb has got to be the simplest carb I have ever taken apart. In fact it's so simple when I had it apart I felt like there's something missing.
    Now if your carb is not leaking as it sits then you are not flooded. You are only flooded if it's leaking. Now you could be low causing your problems so let me tell you exactly where you need to look.
    This is from my own personal opinion so please chime in if I'm wrong.
    Be careful when you remove your float. On my carb,the hinge pin that holds the fork doing that toilet bowl dance with the float slides off on it's own without that float cover. Be careful of that. So with that,slide off that hinge pin and put the fork and hinge pin aside. Then you see the actual valve that goes in the fuel hole. Slide that off and set it aside. Now take your carb cleaner and connect your straw to your nozzle and attack that fuel hole,fuel hole meaning that nipple your fuel line attaches to. THAT is where you will find crud if anywhere on that carb. You'll strangely find crud in your float bowl too. This is when you start to realize the importance of an inline filter. It don't take much at all to mess up that little valve in that copper fuel line.
    Now slide everything back on remembering how that slide came out of that copper gas line. And get a filter.
    I've recently had a low fuel problem myself. And I realized it was due to my tank mod.
    http://www.motoredbikes.com/showpost.php?p=104969&postcount=45
    My tank seals so well now that I'm not giving the tank any air to allow my fuel to flow.
    I also installed my fuel filter wrong. Well anyway you should be okay as far as your carb goes if you push that tickler or "Flood" button and gas comes out within a matter of a few seconds. If it's taking a little while before gas runs out then recheck that copper fuel line valve I mentioned above. That area can easily be overlooked.
     
    Last edited by a moderator: Mar 11, 2008
  9. gameshark39

    gameshark39 New Member

    its alright now, i cleaned the bowl (nothing in there cept gas neways) and fixed the positioning of the carb. It was apparently tilted so that the gas leaked out when it was off and flooded the engine when it was on. Everythings good now, and i gotta say, this bike RIPS!
     
  10. fetor56

    fetor56 Guest

    As usual i'm too late,another satisfied MBc'er........ohh well,don't forget not to leave the choke on. :)
     
  11. Instantbacon

    Instantbacon New Member

    Im having a problem with my carb as well. It seems that the engine will only work (and it seems to work pretty good) if the choke is halfway between on and off. if its off it bogs, if its on it bogs. I took it apart, everything looks right, and the valve works right, im thinking that somehow not enough fuel is getting to the engine, and that all the air is bogging it. Im not really sure, it just seems strange. I have the 65cc dax engine kit, and I have to find the "sweet spot" on the choke just to get it to run. I am going to try to install a speedometer to see what my top speed is. I have heard some mention about settings on the carb, and dont know what to search for...I have heard about 4 different clicks or something, dont see anything that is adjustable on the carb except the idle screw. thanks!
     
  12. azbill

    azbill Active Member

  13. adamtheha

    adamtheha Member

    I had a problem with a new bike...I was forced to tilt the carb because of the way the engine was placed. The bike would choke out at full throttle, and power was terrible!
    The fix was this...remounted the entire engine to make the carb upright. What a difference! Amazing power, now I just need to do something about the vibration...
     
  14. mcassMB6

    mcassMB6 Member

    check to see that your carb float isn't cracked. If it is cracked it will fill with gas and flood your engine.
     
  15. Gnildir

    Gnildir New Member

    I had that same problem before with a cracked carb. It's a good thing that I saved the parts from another engine that seized up on me. Oh, what happened was that my carb was set too far back, and the part that goes on the intake tube must have been cracking. A piece of that broke off and went inside of the cylinder, and seized up the engine. What's even odd was, that when I took the engine apart, I was able to slide the piston out and that part came right off. Hmmm, I managed to get another 200 miles out of it. How? Well, that part that broke off was curved, and it landed inside of the cylinder when the piston was up, and the curved part rested perfectly on the curved part of the piston and cylinder wall, and it basically 'wedged' itself in place. It just slightly nicked the ring groove and a hhhhhhhhhhhhhhhairline scratch on the cylinder wall. so I removed the ring, and took a burnishing file and re-faced the groove where it was nicked, inspected the ring and put it right back on. For the cylinder wall, 1 tiny ding spot.. Took some wet/dry sandpaper, 1000 grit and just went over that ding so the raised area was flush. For that hairline scratch, I left it. I re-assembled it and it fired right up with no loss of power. Now, what killed that engine was the replacement carb, from another earlier engine. I put it on, and it ran well till it started to run too rich. I was on this road, running at 20 mph for 4+ miles, and felt my engine surge and felt the engine was hot. I immediately pulled over and the engine quit, then went to a gas station so I had a safe place to work on the engine. I popped the head off and OMG! The top of the piston was melted! So, another one to the bone yard. Then with a new engine, I got about 300 miles on it before it started to act like it was running rich. I disassembled the carb, and saw that the float was not floating in the bowl. I inspected it and saw a crack. Now it made me curious, and needed to find another float. I decided to snag one from the melted engine, and to my surprise, that was the cause for failure on the meltdown, a cracked float. Now, where was I going to get another float? Then I remembered about the carb that had a cracked tube. Yes! It was perfect, and then put it in my carb, and my bike ran fine. So, what I have been doing is stocking up on some extra parts for the engine. Especially the float as its cheaply made.
     
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