Carb help needed.
#1
Carb help needed.
I am having problems setting my carb for idle, to begin I have a trail boss 250 with a Mikuni 34. when I try to start the quad I have to half choke it once it starts I take the choke off immediately, feather the throttle a bit and it wants to die so i click the choke on and off really fast to bring the idle back up I need to do this 4 or 5 times before the quad will stay running. if i turn the quad off and let it sit for about 2 minutes i need to half choke it to get it going again. yesterday I pulled the carb apart and made sure it was clean put it all back togather and still the same thing is happening I played with the air screw but it didnt seem to be doing anything. I have great compression (143psi) and no air leaks anywhere that i can find. could it be possible that the air duct for the air screw have something in it causing me not to be able to adjust? I turned it all the way in started with 1 turn out went to 2 turns out and back all the way in with no differences. Thanks.
I did a search but couldn`t find anything with my symptoms.
I did a search but couldn`t find anything with my symptoms.
#2
#3
I took all the jets out and run a torch tip file through them. I didn`t measure the hight in the float bowl but bent the float arm so that it was flat (able to retain more fuel in the bowl) and took carb cleaner spray to every passage i could find all seemed to be clear. Think if i was to move the C-clip on the needle down 1 it would help its set on the middle setting now.
#4
Mine acted like that ,it turned out to be the throttle etc switch needed a adjustment.
YouTube - Polaris ATV Maintenance & Repair Tips : Polaris ATV Thumb Throttle Maintenance Tips
YouTube - Polaris ATV Maintenance & Repair Tips : Polaris ATV Thumb Throttle Maintenance Tips
#6
#7