Honda GXV390UT1DEX3 Engine 1" X 3-5/32" Vertical Shaft Dual Start 13 HPAn absolute landscaping workhorse, the Kawasaki FS481V engine is a forced air cooled overhead V valve 4 cycle engine capable of delivering compact power with surprisingly smooth operation and low emissions. Features: Overhead V valve Integrated clean out ports 90 V twin Pressurized lubrication system Automatic compression release Internally vented carburetor Rotating grass chopper screen Dual element air filtration system with reinforced primary