Intense cold is the mortal enemy of any engine, including those made by Kawasaki. Freezing up inhibits the engine’s movement and function, and even if it doesn’t lock up entirely, ambient ice can leak water into the ports and damage its internals. This is why you need to take several extra steps to protect your Kawasaki lawn mower engine in the winter time.
First, when using your lawn mower in the cold, start up the engine and let it idle for a couple of minutes before putting it to work. This gives it time to warm up and get spinning, as opposed to going whole-hog from a cold, stationary start and stressing the components.
Second, if you’re storing your lawn mower regularly in below-freezing conditions, add some gas-line antifreeze to the tank to keep your fuel from freezing solid inside the engine. If you’re storing gas to use in the mower later, make sure to add some fuel stabilizer for the same purpose.
Finally, when the mower, and by extension its engine, are not in use, make sure to store the whole thing in an indoor, preferably temperature-controlled environment like a house-connected garage. Do not leave your mower outdoors, or you’ll expose the engine to rust and moisture damage.