Carb Vent Lines/carb drain
#1
My 500 has been cutting out and sometimes dying at deep water crossings.The air box is dry.I put dielectric grease in the sparkplug boot but it didn't fix the problem.I read on this forum about rerouting the carb vent lines;I rerouted the two lines that come off the top of the carb to up near the air intake.Is this right? I keep seeing on the highlifter forum people talking about plugging their carb drain lines for water crossing;the only carb drain on mine that I'm aware of is on the bottom of the bowl.It seems to run fine with the lines up near the intake but I haven't had a chance to test in the water.
#2
I think you took the words out of my mouth. My 99 model was haveing problems with cutting out and I snorkeled my carb vent lines. So far I've had it rack deep and no problems. I can also find no other carb drain besides the one on the fuel bowl, and thats after looking in the Service manual.
#4
The carb drain is on the bottom of the bowl. Hondas have a small tube coming off the bowl with a 1 way check valve so that gas can get out but water can not get in. From what I have seen that 1 way check valve lasts about 2 months and then no longer works. Then sometimes water will get sucked up there and cause the engine to die. You should not reroute this because it works of gravity. When we ride in water we plug ours with a stick. Then before you haul the quads home unplug it incase it needs to drain due to the shaking on the trailer.
#5
#6
Boner, there should be an overflow somewhere. The drain screw is for when you intentially want to drain the carb like if you got water in there. The overflow is for when the bowl is getting flooded. This usually happens when the quad is off and the gas is still on and it is bouncing around in a trailer. So on a Honda even if the carb drain screw is screwed in it will still let gas out or water in.
#7
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#8
Bill, you are correct. The vent lines should never be plugged. Another common mistake is people routing them into their snorkel, which will create a vacuum. If you are snorkeling a quad you need to route them outside the snorkel. The line that I am talking about plugging is the drain line.
The drain line can be seen here in a picture of the bottom of the bowl and here in a diagram of the carb.
The drain line can be seen here in a picture of the bottom of the bowl and here in a diagram of the carb.
#10