Kawasaki 25 HP Vertical Engine FH721V-(G)S24-S

Kawasaki 25 HP Vertical Engine FH721V-(G)S24-S

The Kawasaki FH721V-GS24-S is a high-performance 25 HP vertical shaft engine engineered for commercial operators who demand consistent power and long-term durability. Utilizing a 90° V-twin overhead valve (OHV) architecture, this engine provides a naturally balanced operation that reduces vibration and noise, making it an ideal choice for high-capacity zero-turn mowers and industrial equipment.

Features:

V-Twin

• Engineered with a 90° V-Twin configuration, this design provides a naturally balanced power stroke that significantly reduces engine vibration while delivering high-torque performance for smooth, professional operation.
  

Vertical PTO shaft

• Equipped with a vertical Power Take-Off (PTO) shaft, specifically designed for seamless integration with zero-turn mowers and pressure washers where the drive pulleys are positioned beneath the engine deck.
  

Cast iron cylinder liners

• Featuring heavy-duty cast iron cylinder sleeves, this engine is built for commercial longevity, providing a rugged and wear-resistant internal surface that withstands the heat and friction of daily professional use.
  

Overhead valves (OHV)

• The overhead valve (OHV) architecture optimizes the combustion process by allowing for more efficient intake and exhaust flow, resulting in cooler operating temperatures and improved fuel economy.
  

Float type carburetor

• Utilizes a precision float-style carburetor to maintain a consistent fuel level, ensuring reliable throttle response and stable engine performance across various operating angles.
  

Fixed main jet

• Designed with a factory-set fixed main jet, which ensures the air-fuel mixture remains at the ideal ratio for peak performance without the need for manual adjustments or the risk of running too lean.
  

Pulse type fuel pump

• Includes a vacuum-actuated pulse fuel pump, engineered to deliver a steady and reliable flow of gasoline from the fuel tank to the engine, even when operating on steep inclines.
  

Flywheel magneto transistor type ignition system

• Equipped with a solid-state transistorized ignition system, which uses the flywheel's rotation to generate a high-intensity spark for dependable, "turn-key" starts and maintenance-free operation.
  

Full pressure lubrication system

• Features an automotive-grade full-pressure lubrication system that uses a high-capacity pump to circulate oil to every critical bearing, ensuring total engine protection under heavy commercial loads.
  

Spin-on oil filter

• Includes a high-efficiency spin-on oil filter, allowing for quick and mess-free maintenance while effectively capturing microscopic contaminants to keep the internal engine components clean.

H.D. Canister Air Cleaner

• Protected by a heavy-duty canister-style air filtration system, designed to trap fine dust and debris in the harshest landscaping environments to prevent internal engine wear.

Bendix Type Electric Starter

• Utilizes a Bendix-style electric starter motor, which provides positive and powerful engagement with the flywheel for rapid, reliable engine cranking every time you turn the key.

12v-13a Charging Coil w/ Regulator

• Features a high-output 13-amp charging system with an integrated regulator to keep your machine's battery charged and provide consistent power for electric clutches and accessories.

75.2 mm Cylinder Bore / 76 mm Piston Stroke

• With a 75.2 mm bore and a 76 mm stroke, this engine is "undersquare" by design, a configuration that prioritizes high-torque output at lower RPMs—perfect for maintaining blade speed in thick grass.

8.1:1 Compression Ratio

• Engineered with an 8.1:1 compression ratio, balancing high power output with the ability to run reliably on standard pump gasoline without the risk of engine knock or pinging.

2,400 RPM of Torque

• Specially tuned to reach its peak torque at 2,400 RPM, ensuring that the engine has the "grunt" needed to power through heavy loads without bogging down.

Automatic Compression Release (ACR)

• The automatic compression release mechanism instantly reduces internal pressure during the starting cycle, allowing the engine to turn over effortlessly and reducing strain on the starter and battery.

Mechanical Governor

• Features a precision mechanical governor system that senses changes in engine load and instantly adjusts the throttle to maintain a stable and consistent RPM, regardless of grass thickness.

Pulse Fuel Pump

• The integrated pulse pump utilizes crankcase pressure to ensure a constant fuel supply, eliminating the reliance on gravity-fed systems.

Dual Barrel Carburetor with Fuel Shut-Off Solenoid

• Equipped with a dual-barrel carburetor for enhanced air-fuel distribution, along with an electronic fuel shut-off solenoid that cuts the gas supply instantly when the key is turned off to prevent backfiring.

Electronic Ignition

• The high-energy electronic ignition system ensures precision timing and a consistent spark, resulting in a smoother idle, better fuel efficiency, and reduced emissions.

Dual Cable Controls

• Designed for dual cable control setups, allowing for separate and precise adjustment of both the throttle and the choke from the operator's position for total machine control.