Vent lines everywhere...
Posted May 10, 2006 - 07:11 AM
Posted May 10, 2006 - 07:53 AM
The other tubes are atmospheric vents for the float bowl. They are redundant to some extent, but they wouldn't be there if they were totally unnecessary, either. Blocking any of them off might have an effect you didn't want.
It's important to understand that under normal circumstances, very little air actually moves through any of these in either direction. The void left by fuel leaving the float bowl through the jets is mostly made up for by new fuel coming in from the tank. The vents simply even out any pressure variations caused by temporary interruptions in flow, such as bouncing around, or forgetting to turn on the gas. They are also required so that fuel entering a dry bowl can displace air without having to push fuel through a jet to do it.
You could, I suppose, T them all into a single, larger hose. Some route the top two to the air box to reduce the possibility of water being drawn up and into them.
All of the circuits through which any significant amount of air actually does flow, like the hot start and choke, are fed filtered air from inside the carb, not through vents leading out into the dirt.
Posted May 10, 2006 - 08:03 AM