I have a Gravely 260Z XDZ with the 27 hp Kaw engine. I got to looking at it and the hood fits right down on the air cleaner snout. There is about 1/8 gap on one side and I notice if I lift the hood, (there should be more clerance than this) the engine changes speed. I have another Gravely 260Z with the Kaw water cooled and the air cleaner is set up different. It has a air horn over the air cleaner snout to sort of catch grass and twigs or leaves. I really dont know what to do about the first one as there isnt any room to put a air horn over it and I dont know if I should saw it off so it can get air. The snout sticks up about 1" out of the air filter housing. If you own one could you look and see how yours is set up?