OK... i just a post like this... but since you didn't bash the site... please give it more than an hour to get an answer.
The filter in the carb(s) is in the pump side. You have to remove the pump cover, and you will see the little plastic bucket.
Just to add to this....
the low speed adjuster is toward the bottom of the carb, by the throttle linkage, and the high speed is toward the top, on the opposite side.