ThugBike
New Member
I'm working with a recent BGF 49cc slant head kit, purchased around a month ago. So far, I've got it running, although quite rich, and I've got the needle set to the highest clip (leanest setting) as I am at around 5000 feet altitude. So the plug comes out black and wet, and black oil drips from the muffler, and there's also some black oil around the spark plug area on the head, and I almost always get smoke out of the exhaust. All signs of running rather rich, I believe. It will usually hold an idle although I had to turn the screw in quite a ways to keep it from stalling.
Now, onto the carb stuff...I've attached some pictures to this post...the carb has the name "HUAZHONG" on it, and it has no intake tube, it just bolts right up to the engine. I don't know if this is the reason, but it is held on by some nuts (8mm I think) that are in a place so cramped that I can't even come close to fitting a combo wrench or socket around the nuts. (Check out the picture, they must use a paper thin socket at the factory, or something. And that slightly rounded off nut edge is courtesy of the factory as well.)
So, question #1: How in the heck do I get these nuts off to remove and dissassemble the carb? Has anyone played with this model carb, and successfully removed it from the engine?
There is some kind of "tube to nowhere" the comes out from where you might normally find a "float tickler", goes under the carb bowl (through a loop that appears to be designed to hold a tube), and then is pinched off at the end between the carb bowl and the bolt that the clutch cable goes through. (Please see the attached picture for my wordy description to make any sense.)
Question #2: What is the function of this "tube to nowhere"?
After running the engine for awhile, I close the petcock (attached to the carb) and the engine continues to run seemingly forever. So the petcock appears to be worthless. If I close the petcock at the tank, the engine will die within around 30 seconds. While the engine cools, I can hear some gurgling sounds in the carb, and after pulling the throttle cable, I was able to see fuel being slowly and randomly spit out of the jet. So usually I have gas dripping through the air filter out out onto the floor after shutting down. At there very least, there's always some gas visible when I pull the air filtre.
Question #3: Is the petcock likely to blame for the excess gas spewing out, or could a faulty float needle set up also cause this?
Since I'm running wet-plug-rich with the needle at the leanest setting, my gut tells me the float set up is not correct and I've got a small flood down there. But, since so far I've been unable to pull the carb, I'm not sure how to continue.
Ooops, I ended up almost writing a book on this, thanks for listening if you made it this far.
Now, onto the carb stuff...I've attached some pictures to this post...the carb has the name "HUAZHONG" on it, and it has no intake tube, it just bolts right up to the engine. I don't know if this is the reason, but it is held on by some nuts (8mm I think) that are in a place so cramped that I can't even come close to fitting a combo wrench or socket around the nuts. (Check out the picture, they must use a paper thin socket at the factory, or something. And that slightly rounded off nut edge is courtesy of the factory as well.)
So, question #1: How in the heck do I get these nuts off to remove and dissassemble the carb? Has anyone played with this model carb, and successfully removed it from the engine?
There is some kind of "tube to nowhere" the comes out from where you might normally find a "float tickler", goes under the carb bowl (through a loop that appears to be designed to hold a tube), and then is pinched off at the end between the carb bowl and the bolt that the clutch cable goes through. (Please see the attached picture for my wordy description to make any sense.)
Question #2: What is the function of this "tube to nowhere"?
After running the engine for awhile, I close the petcock (attached to the carb) and the engine continues to run seemingly forever. So the petcock appears to be worthless. If I close the petcock at the tank, the engine will die within around 30 seconds. While the engine cools, I can hear some gurgling sounds in the carb, and after pulling the throttle cable, I was able to see fuel being slowly and randomly spit out of the jet. So usually I have gas dripping through the air filter out out onto the floor after shutting down. At there very least, there's always some gas visible when I pull the air filtre.
Question #3: Is the petcock likely to blame for the excess gas spewing out, or could a faulty float needle set up also cause this?
Since I'm running wet-plug-rich with the needle at the leanest setting, my gut tells me the float set up is not correct and I've got a small flood down there. But, since so far I've been unable to pull the carb, I'm not sure how to continue.
Ooops, I ended up almost writing a book on this, thanks for listening if you made it this far.