Kawasaki FX730V-FS12-S 23.5HP V-Twin Vertical Shaft Engine Electric Start

Durably built for the toughest jobs on your docket, the forced-air-cooled V-twin 4-cycle vertical shaft FX730V engine features a heavy-duty shift-type starter and 23.5 SAE Certified horsepower. This is the kind of muscle you can count on through the busy season and back again.

Features:

Engine performance, by the numbers.

• From power and torque numbers to engine features and more, the following is here to help communicate engine performance details and capabilities. Be sure to consider these specs to help ensure the engine you’re choosing is a match to your mowing needs.

Overhead v-valve

• For the Kawasaki FX730V-FS12-S, the Overhead V-Valve (OHV) design is a hallmark of its commercial-grade performance. By placing the valves directly above the combustion chamber in a precision 90-degree V-layout, this 23.5HP engine achieves highly efficient gas exchange and cooling—essential for the grueling demands of professional landscaping.

90° V-twin

• For the Kawasaki FX730V-FS12-S, the 90° V-Twin configuration is the engineering foundation that gives this 23.5HP engine its professional reputation. By aligning the cylinders at a perfect right angle, Kawasaki delivers a high-displacement 726cc power plant that is naturally balanced, extremely smooth, and incredibly durable.

Pressurized lubrication system

• For the Kawasaki FX730V-FS12-S, the Pressurized Lubrication System is a heavy-duty oiling solution built to endure the rigors of commercial use. Unlike basic engines that rely on oil "splashing," this 23.5HP powerhouse utilizes a dedicated high-volume pump to force a constant supply of oil to every critical internal bearing and surface.

Electronic spark ignition

• For the Kawasaki FX730V-FS12-S, the Electronic Spark Ignition is a high-performance, solid-state system engineered for the relentless schedule of a professional landscaper. By eliminating mechanical points and moving parts, this system ensures that the 23.5HP engine delivers a precision-timed, high-intensity spark for instant starting and consistent power under heavy loads.

Automatic compression releaseRotating metal grass chopper screen

• It looks like you've combined two distinct mechanical features: the Automatic Compression Release (ACR) and the Rotating Metal Grass Chopper Screen. For the commercial-grade Kawasaki FX730V, these two systems work together to ensure the engine starts easily and stays cool in extreme debris.

Multi-Stage canister air filter

• For the Kawasaki FX730V-FS12-S, the Multi-Stage Canister Air Filter is a premium, industrial-grade filtration system. Unlike the flat filters found on residential engines, this heavy-duty canister is designed to provide the 23.5HP engine with laboratory-clean air, even in the "dust bowl" conditions of professional landscaping.

Cast-iron cylinder liners

• For the Kawasaki FX730V-FS12-S, the Cast-Iron Cylinder Liners are a foundational "Heavy Duty" feature that separates this commercial engine from consumer-grade models. By reinforcing the 726cc aluminum block with high-density iron sleeves, Kawasaki ensures the 23.5HP engine can withstand the friction and heat of daily, high-hour professional use.

Metal engine cover with integrated clean out ports

• For the Kawasaki FX730V-FS12-S, the Metal Engine Cover with Integrated Clean-Out Ports is a premium "Commercial Grade" feature. While residential engines often use plastic shrouds, this heavy-duty steel housing is built to withstand the physical abuse of professional use while making essential maintenance faster and easier.

Heavy duty shift-type starter

• For the Kawasaki FX730V-FS12-S, the Heavy-Duty Shift-Type Starter is a professional-grade upgrade modeled after automotive technology. Unlike the "Bendix-type" starters found on smaller engines, this solenoid-shift system ensures positive gear engagement every time, providing the high-torque kick needed to fire up the 23.5HP engine instantly.