today when i was riding around my yard my 300 started to sputter and if u gave it any kind of gas it acted like it just drowned out but if u turn the choke on it runs fine. this is not the first time its done this and both times it has it has been after about 10 minutes of riding. i always let it warm up before i ride it. anybody know what it is?

 

Check the fuel line. Maybe something is blocking the oxygen feed. Make sure the vent is open also.
Coltrane300

 

yeah your artery is getting clogged, and your heart is weakening, better use a oxygen tank.

 

i think it may be your fuel line. i have just had a problem with my choke freezing up so i can't use it. i guess i need to take the cable out and try to oil it or something.