Hustler Mini Z Stalling

[grassisgreener]

I have a Hustler miniZ 52" with the 19 hp Kawasaki motor. It only has 150 hours on the engine. After having the blade engage switch replaced last week when the blades simply stopped working, the mower simple runs for a little bit and begins to choke out and stall. after letting it sit for a couple of minutes it starts back up and then does the same thing over again. Any help would be much appreciated. Its tough to earn a living off of a machine that keeps breaking down!

-------Grass is Greener