I have a 19 hp Kawasaki in an exmark it has 615 hours on Oct 24, 2017I have a 19 hp Kawasaki in an exmark it has 615 hours on it and started running rough. I replaced the fuel filter and 2new plugs. Shoes do better at full throttle but seems to be running about half power. Mechanic's Assistant: Do you have fuel in the tank? If so, is the shut-off valve open and the fuel clean? Yes to both Amazon: 19 hp kawasaki engine Amazon: 19 hp kawasaki engine. Skip to main content. Try Prime AUTOKAY Air Filter Fuel Pump for Kawasaki 110137002 FH451V FH500V FH531V FH580V FH680D 23 HP 4 Stroke Engine. $13 $ 13. 88. Get it as soon as Wed, May 1. FREE Shipping on orders over $25 shipped by Amazon.