I have recently purchased an 83 Big Red 3 wheeler, but I'm having some difficulty getting it to run correctly. It was loading up on gas (gas pouring through the intake and into the engine) when I bought it, so I bought a rebuild kit for the carb. I replaced the 2 jets/metering rods and the float valve. I put it back together, and I'm still having the same problem. The gas pours through the engine, and it idles to the moon. Gas will even come out of the bowl drain. There are still parts in my rebuild kit that I haven't used, but I'm unsure of how to take the carb apart much more than I already have. Does anyone have any insight as to what would make the carb do this? Thank you very much, Tony

 

 

Thank you very much for the detailed reply. I appreciate it. I am still having a problem though. After reviewing the posted manual instructions, the carb is still loading the engine up with gas. I replaced everything except the plastic float. The float hangs real low when the carb is assembled (float valve fits very loosely into the carb). I think the added weight of the float valve offsets the floats ability to function properly and makes the carb load up with fuel.

It says to carefully bend the float arm, but I tried that and cracked the plastic float..(ugh). What can I do to make this carb work, or should I buy a new carb? Thank you in advance for any and all responces. Tony C (C for confused.....LOL)

 

The inlet needle should shut the fuel off when the float raises .. The seat for the needle can't be changed it is pressed into the carb body, does it look good it is hard to check .. I use a magnifier with light ..

 

I'm not really sure, it looks OK. It just holds the float valve so loosely, but I'm not sure how the seat looks. I bet it is probably worn out. If it is, should I buy a new carb? BTW, thanks for the reply.

 

<div class="FTQUOTE"><begin quote>The gas pours through the engine, and it idles to the moon.</end quote></div>
What do you mean "idles to the moon."

About the float. I have an old can with a hose on it. I hook it up to the carb with the bowl off and gas in the can. I lift the float with "slight" upward pressure. If gas still comes out, you have a needle and or seat problem.

 

The idle to the moon sounds like the slide is in wrong (backwards).. 1 side of the slide has a slot that the guide pin runs in , the other side of the slide has the idle screw ramp ..

 

I've checked that throttle slide, and its in correctly. I really think the problem is with the float. I mean, sometimes the gas pours out of the bowl drain, other times it dosen't. But the consistant thing is the engine floods out and it idles high. I have to run it on full choke, and even then I'm afraid it'll blow. I pulled the spark plug and inserted a small rubber hose into the cylinder, and it was flooded out with gas. The gas was not really deep, but it causes the plug not to fire.

BTW, where is the "float arm", and if its a plastic piece, how do I bend it without breaking it? Also, should the throttle slide go completely down the carburator and close it off? I see there are 2 grooves in the topside of the carb near the needle valve seat. Should the slide go down and sit in those grooves? The throttle is lined up according to the diagram and functions properly.

Thanks in advance for the replies....

Tony

 

The only way a gasoline engine can gain RPM is with air. You can add all the fuel you want and it won't gain RPM. You have an air leak somewhere. The most probable place, like HondaMechanic said is the slide is in wrong.
The slide should hit the idle control screw. If it dosen't you have it in wrong.

 

PM your email address and I will email you the fuel section from the 1982-83 ATC200E PDF shop manual ..