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Discussion Starter · #1 ·
I have a Rhino 660 that is running very rich and is backfiring. I was attempting to clean/adjust the A/F screw, but I noticed something fall out.

Is there a rubber gasket or seat at the bottom of the A/F screw? I reinstalled the A/F screw without any kind of gasket or seat and it seems to be running worse.

Thanks,

Mike
 

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Follow up...

Is the A/F screw everybody refers to the same thing as the "pilot screw"? If so, it looks like I am missing a lot of parts!


Thanks,

Mike
Yes, they are the same. I've been adjusting mine and found it runs and cranks best at 1.5-2.0 rounds open from seated. Right now, mine is set at 1.75. One way to check for air leaks is to spray carburetor cleaner around the carb when it is all back together. Any change in rpms would signify a leak. I hope this helps. Jim
 
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