CH980-0016
Neighbor has two of these bigger Kohlers. One has this canister style air filter, the other has the flat box type. The one with the flat box doesn't seem to allow enough air - smokes black even with new air filter. If the lid is off the housing, it's fine. He wants to switch for the 62-048-09-S air filter kit, except it doesn't have an "anti-icing" (heater) kit, which is a necessity in our cold winters.
Any ideas on this? Anyone running one of these with the smaller, flat filter housing??
BLES