I have a 2005 sportsman 400. It has been runnig great up to the last week or so. I noticed it need to be choked then longer each time. Then It would not run without the choke on at all. Im in Florida. not a weather problem. I pulled the carb, cleaned the jets, checked the float(seems ok) . noticed main needle was poped out and spring was coiled in the top. This might have been when I took it apart. put it back no problems there. It will run and has power. It surges now. If I rase the idel it jumps way up. then some times it will come back down. the only thing I did not mess with and I think it may be the problem is the choke itself. I did not see how to remove the cable from the carb easly, so I pulled it from the head and left it attached while cleaning the rest. It is almost like it is sticking but yet I don't feel this when I operate it. Also I need to see what is up with my gas shut off. I closed it today hopeing to dry out the cab. The thing just keeps running. I am going to check it out tommorow. Any and all help greatly appreciated. Thank you Ron Keller

 

you could have an air leak somewhere like a cracked boot. i know sometimes if its sucking air the idle w/ be irratack and will idle high and slowly drop. could be a diaphram issue being bad and messing up the vaccume. maybe the shut off it broke inside and will longer shut off. just a couple of idears.

 

Thanks for the quick reply. Any idea if the leak might be in a line to the carb? or just the boot area. I might take the whole thing apart later today to check everything. I am going to take a close look at the diaphram since the spring was lodged in the top in a coiled configuration. Not sure what caused this. I am now thinking maybe a pin hole in it. I will let you know what I find

Thanks again for the help [img]i/expressions/face-icon-small-smile.gif[/img]

 

Well I got my problem fixed. of all things it was the fule petcock. I new it would not turn off yesterday. Today I noticed it was leaking. While I had everything apart ( carb out again) I tryed turning it on and off. No flow when on. Thus I went out and bought an replacment. Put everything back and sure enough problem solved.

I think the old petcock was letting in air and this was causing the problem.

Thanks all for the help.

Now I am going to sell this machine. My nephew and I are more into fishing, time for a boat.

Ride safe..... Ron keller

 

glad you got it fixed ron. the lack of gas would make it ast the same way as it was getting more air then gas. good luck happy fishing.