I have an Exmark Turf Tracer HP 19hp 48" that is giving me a problem. With the blades engaged it runs bad and is using two times the gas it use too. I have to slow it down to cut right. Blogs down like the belts are going to come off it. Deck pulleys, belt, idler, and spindles are fine. Some times I here a tick and it will start running fine. Could the Carb solenoid be bad? I don't know I'm lost! Idles fine but off idle its dumping the gas!