Carb problem with 2000 Arctic Cat 300

Wonderwoman · February 17, 2010

Well this started as gas going out the air box side of the carb all the way around in that hose and dumping gas all over the machine. I took the carb apart, cleaned it well and put it back together. I then adjusted the valves to make sure everything was kosher. When I took the cap off the bottom valve I was greated by 1/2 pint of gas with a little oil in it. So after adjusting valves and putting everything back together I changed the oil. Started it up and rode it for about a half an hour. No more gas spewing out of the air box hose. Let it sit overnight and went to start it. Wouldn't start, lifted the compression release and it started. Smelled like gas coming out of the exhaust again. What should I check? What is letting gas get into the cylinder?

arcticplayer · February 18, 2010

are you sure its not flooding on start up and if it is check the float height if is off then its dumping to much fuel in and could foul the plug and would give you the smell of gas.

Wonderwoman · February 18, 2010

Nope not flooding on start up. It was actually spewing gas out that hose that goes from the air box all the way up by the gas tank and then comes back to just below the air box while riding. I replaced the spring in the diaphram part of the carb, made sure the carb was cleaned good and all settings were per the service manual. We have 6000 miles on this machine and it has never been a problem up until now. If the float height is messed up would that allow gas to back flow into the air chamber????

arcticplayer · February 18, 2010

not sure if it could cause that have you put in a new needle and seat. for the cost of one i would try that and check the float aswell. look to see if there is gas in the float aswell i have seen them fill with gas and mess up all the setting.