Review on 🔧 High-Performance Fuel Pump Replacement for Kohler Engines: K241 K301 K321 K341, 10-16hp, M10 M12 | Replaces 4739319-S, 4755901-S, 4755903-S, and more! by Jared Stauder

Pump fittings have never been the way they were. There was no check valve in there. Only one 1/4" fitting is listed, but two are required, one for the inside and one for the outside. I would return it but I have to cut the grass. So I used a diaphragm, fitting and gaskets from a new one I ordered and rebuilt my old one. Remove to save two hours of trouble, really look at the details. Or just order a diaphragm and gaskets for a few bucks.