Cat Z 370 too rich

[catalac]

My boys sled was "loading up" while he was getting on and off the throttle riding in the ditches last year. I pulled the plugs and both are black and wet, so I figured its just running way rich. How do I go about leaning it out?
Thanks,
Tim

 

[mezz]

This is a fan cooled carb sled right? Silly question perhaps, but when is the last time the carb was cleaned? Change the plugs out & put some fresh fuel in & see how it acts. There is a pilot air adjustment on it, but I don't think that's the issue, it could be a little gummy build up that needs to get cleaned out.-Mezz

 

[ezra]

did u get is used? last guy could have made it fat for some sub zero weather. try fresh fuel if not pull the main jets and drop 1 size under 25 bucks if u do t your self. if u bring it in for a carb cleaning make sure they check what jets are in it and if those are the correct jets for it

 

[toddspolaris]

could the chokes be sticking? float levels off. leaking inlet needles. fuel pump? jetted to rich

 

[catalac]

Thanks guys. Changed plugs and some new gas. took out in the yard last night and she pop and sputtered a few times getting on and off it. Once I get on it and clean it out, it runs good, but shouldn't do that running slow speeds.
Carbs were serviced last season but it did it after that too.
I think I'll try one size down on the mains. After that I'm probably done, will have to take it to the shop.
Thanks again.

 

[racerxnet]

Pull out the choke plunger and make sure it moves freely and seats at the bottom of the well. Is the return spring in good shape and 1 piece?

MAK

 

[jhsmustang]

Pull out the choke plunger and make sure it moves freely and seats at the bottom of the well. Is the return spring in good shape and 1 piece?

MAK

Same problem, same snowmobile.. Removed carb and heard rattling noise in float bowl. Took apart and found the main jet off. Put back together and runs great.

 

[catalac]

I took the carb off and it looked brand new to me. I didn't hear any rattles and choke seemed to move freely. Put it back together and took it to the dealer. Hope they can figure something out.

 

[jhsmustang]

I took the carb off and it looked brand new to me. I didn't hear any rattles and choke seemed to move freely. Put it back together and took it to the dealer. Hope they can figure something out.

We got snow this weekend & took it for a ride. The best it has run in years. Runs strong. Hope you get yours fixed.