For sure MF getting 14 running is easy, when they are in your own hands, if one gives a little problem you can easily fix it, but when they are out of your control and people leave the fuel on and the needle doesn't seat properly and you end up with a tank of fuel going into the motor, or the motor revs up and down because the needle is not flowing properly or it is getting stuck in the seat, all easy problems to fix if it is one of your mowers but the majority of people just want a reliable mower they can walk out and start whenever they want to. I can't achieve this with the garbage float needles and primer caps that are available. Every so often I get one that works perfectly every time but the percentage of failures is way too high for me to be bothered with them anymore