My ZG127s has 273 hours on it and stalls after using less than a gallon of gas. It's been stalling for at least 2 years and I've narrowed it down to a gas issue.
Today I mowed my large property and it stalled about 5 times. I added a little gas each time and it started up. Then drove it around pulling a cart, blades not engaged. No stalling.
two usual causes of this
1) floating debris in fuel tank that forms a plug in the outlet like hair in a shower drain remove tank & clean it .
2) tank not venting properly, try mowing with the cap loose