Hose on bottom of carborator where does it connect to?

[bspeedy]

For sure the Keihin would be a superior unit if available. I would not try the full replacement until I determined that I could not get the old carb to work. Interesting to hear your experience with the aftermarket carb. I've never used one (suspecting the results you got) but a good friend bought one for his honda atv and it worked perfectly right out of the box.

I'd say read any reviews on such things and buyer beware. Unless the machine has tons of hours or has been sitting for years, you can usually get things sorted with the ultrasonic cleaner and a bit of hassle, maybe a pilot jet and needle valve...

 

[dfkrug]

I've never used one (suspecting the results you got) but a good friend bought one for his
honda atv and it worked perfectly right out of the box.

I am not totally down on Chinese carbs. You do need to take apart new ones to clean them and make sure
all screws are tight. QA is lacking, but materials are not too bad. A recent one had a leak thru the casting in
the float bowl. No problem getting a replacement, even when getting it directly from China.

That said, I have an ultrasonic cleaner, but use it primarily for M/C carbs, and chainsaw cyls. ATV carbs have
very accessible jets and air passages which can be inspected and cleaned readily. My last unsalvageable
OEM carbs were a Mikuni with a broken float pivot, and numerous Keihins with seized pilot screws.

To the OP's Q: that hose and other(s) hang down and connect to nothing. On some ATVs, the carb drain or
vent hoses connect to the airbox to limit dirt infiltration. The carb drain hose and the bowl overflow hose
is usually the same hose.

 

[ruffdog]

Like others have said, it's a overflow. If you pull the float bowl, you will see it is connected to a brass tube that SHOULD be above the fuel level unless the float sticks. You need to SEE what foreign matter is sticking the needle valve open. Is there more of it in the fuel line and fuel tank? Is the real problem contaminated fuel vs the carburetor? Is the fuel tank vent plugged so under expansion it pushes fuel past the needle valve? Many variables that need a experienced eye.......

 

[crazyal]

The hose usually serves two purposes, one is (as others have said) used to allow excess gas inside the carb fuel bowl to drain out without going into the engine can causing damage. The other is as a drain for the bowl when it needs to be emptied (also mentioned). They usually tie together with a tee. If you have gas coming out of it and your tank is draining I wouldn't ignore it. Most likely it's not going to fix itself and it does have the possibility to get worse leaving you stranded. The petcock (if you have one) on the bottom of the tank may also have a filter of some sort and a trap to collect water that should also be checked every so often.

When you had the carb rebuilt did you remove it and bring it to them or just dropped off the machine and let them do the work?