[jdbob]

I have an Snapper 8hp snowblower that's getting on in years and right now it only runs fully choked. I imagine it's all in the carb. Do the needle adjusters slowly lose their adjustment, because it was running fine last year and gradually needed more choking?

[crigby]

Hi,
No the adjustment needles should not move out of adjutment if all pieces are there. The needles should have a spring, a washer and a sealing o-ring on them in that order. The spring holds them in place, the washer protects the o-ring from the end of the spring and the o-ring seals the jet.
More likely is the slow accumulation of varnish or some contaminate in the fuel.
Peace,
Clarke

[ballengerb1]

If you have the time just add some SeaFoam carb cleaner to your gas. Over the next tank or two your problem will go away faster than it appeared.