I currently have a 60 in hustler with a 36 hp vanguard. This is the 2nd one I've owned since the first was covered under warrently for the same exact problems. Mostly on hot days with a lot of mowing both the first and 2nd mower would randomly shut off (mostly after being shut off for a minute or 2) and would barely crank or wouldn't crank at all. The dealer told me that hustler believes it is due to the gas heating up inside the lines/carb/fuel pump. On my newest model the hustler dealer...
Problems with 36hp vanguard
Problems with 36hp vanguard