Restart,
I bought one of these and was disappointed in the speed at which it performed. It took about 10 minutes and a lot of short strokes to put a couple of gallons of fuel in my tractor. I finally took it off of the can and used the conventional spout that came with the can to finish the job. I think it would be fine to fill a small tank on a mower with gas, but I'm looking for something that can deliver a little more volume. I actually had pretty good results with the kerosene type bulb pump that once it is primed it continues to pull fuel through it. Only down side is you have to lift the 5 gallon can up to the fill spout to use it.