Your Kawasaki small engine may not have the right fuel to air mixture. Generally small engines need a 14 to 1 ratio of air to fuel to start properly and to run correctly.
If the mix is getting too much air it is too lean, and it will be hard to start, idle rough and misfire often. Check to see if the choke is stuck open.
If the mix is running rich with too much fuel, it will bog down, stall easily, and run very smoky. check to see if the choke is stuck in the closed position after the engine starts. The choke should be closed when the engine starts but should open when itâ€™s running.
Clean the carburetor with a carburetor cleaner and consult your service manual to find out how to adjust the lean-to-rich mixture on your small engine.
You can find the model and serial numbers located on the bottom left side of the engine.