Hi,
I recently bought a 50 cc ATV (2004 Dinli) which had the wrong carb installed, however the seller also gave me what appears to be one of the "right" carbs for it, however seems to be a one-carb-fits-many setup.

I'm trying to identify the nipples on it; there are 7! It is an electric choke carb, correct for the ATV. The 7 nipples/ports include:


-Large throttle cable tube on top, threaded with 90* bend - fits my throttle cable perfectly, slide operates well
-1/4" cast aluminum nipple on top, presumably fuel inlet, goes straight down to needle valve attached to float
-1/8" barbed brass nipple on the side that goes into the venturi
-1/8" cast aluminum nipple on top of venturi
-1/4" barbed brass nipple on the side, goes into the carb about where the slide is. maybe the oil inlet?? my 50 cc has a little 1/8" oil hose, but maybe the 90 and 110 atvs have a larger oil hose?
-1/8" inch long bent brass tube with no barbs
-1/4" inch drain/overflow nipple on bottom of bowl





Any ideas on how I can identify the nipples I'm not sure of? Maybe the brass one on the venturi is a second option for oil inlet? And is the bent brass tube a vent? The tube points upwards though, shouldn't a vent point downwards? And where does my manifold vacuum tube connect?


The way I have it installed at the moment, it's flooding. I'm trying to adjust the float, but I want to know if I've capped a vent nipple would that cause it to flood and make my float adjustments a wild goose chase?


Thanks for reading, thanks in advance for your help!!

 

Not my carb but, my guess is: 1/8 brass= oil injection
1/4 brass fuel inlet. I've not seen a alum fuel inlet before.
Bent brass is the bowl vent.
Bottom is the bowl drain but you knew that.
Don't know about the alum nips. If the machine has a vac operated petcock then one is the vac supply.

 

Alright I figured it out! Mostly. This carburetor, by the way, is listed as a Lumix GC for Dinli 50, 90, 110cc and I imagine would fit other motors also. I attached a picture with labels on each of the ports I identified. There is still the one cast into the carb on top of the venturi that I'm not sure of, but maybe that's there for optional pcv or similar. The two oil nipples are, I guess, for different methods of oil delivery. A larger one that goes in right at the slide and a smaller one that goes into the venturi just before the intake elbow. Use the one appropriate for your motor and cap the other.





I also figured out what was flooding the cylinder, and it was NOT the carb (or at least... not THIS carb). Turns out the exhaust pipe was full of fuel and was flooding the cylinder! The previous carb likely was flooding and it filled the cylinder, and then the exhaust pipe. Changed carbs, drained cylinder, but the exhaust pipe was still full of fuel. On every other stroke without firing, the piston pulled some fuel in from the exhaust pipe. Only takes a few strokes to fill up the little 50 cc cylinder to a point that it can't compress enough for a full stroke.


So the 2004 Dinli Dino is running nicely in time for my son's 5th birthday! Thanks for reading, thanks to LT80 for your help.


Don

 

Wasn't right but an A for effort I suppose..LOL
Glad you got it going.