I have a 400 Ranger with 7 hours on it and noticed that the small 1/4 clear plastic hose from beneath the carb bowl is leaking a small amount of gas occasionally onto the bottom of the frame on the skid plate where it ends at. Its not alot and I just noticed it because the gas had darkened the dust on the skid plate. I checked the drain screw on the bottom of the bowl and it was a little loose so I tightened it thinking that it may have been open a little allowing gas to flow into the discharge line. I have not had a chance to give it a good run to see if any gas will drip or not but I am assuming that this drain screw should be tightened all the way and was wondering if anyone else had a problem with these carbs doing this.

 

I noticed when I fill up my quad that there is a vent tube but that doesn't sound like what you're describing. You might look up a parts diagram on one of the online sites that sells Polaris parts just to see if it is just a carb. drain or not. Try Babbitts Online. Arctic Cat,Polaris,Suzuki,Kawasaki,Honda,Yamaha,Sea-doo,Can-Am dealer Muskegon, Michigan

 

Tks for the link to the diagrams, I found it in the diagrams, it says it is just a "screw" and its located on the bottom of the bowl they are just not showing the clear plastic tubing coming off of the bottom of the bowl. I know when I was purchasing it the salesman told me its the same engine, a 455cc, that is used in the four-wheelers, in the diagram picture it also says 2005 Polaris industries so there should be a bunch of these carbs on four wheelers

 

Talked to the mechanic, not uncommon on the 400s or even some of the four-wheelers especially new, the vibration of the engine at idle will cause gas to go in to the overflow pipe in the carb bowl and drip a bit into the drain hose, he said as long as gas is not "flowing" out its fine. So now we now this hose acts as an overflow and a drain, and he also said don't overtighten the drain screw it is stripped easily. He said most people don't notice it because they don't look that hard at their machines.

 

That's good news.

 

Oh yeah, at least now I know tks for replying