Kawasaki FX850V-(F)S42-S 29.5 HP Engine 850 Series
Power and precision team up to tackle the toughest jobs in the V-twin 4-cycle Kawasaki FX850V engine. With serious torque on tap, this engine features a heavy-duty shift-type starter and twin-barrel, internally vented carburetor with fuel shut-off solenoid. Plus, cast-iron cylinder liners and a metal engine cover with integrated clean-out ports contribute to trusted durability and reliable longevity.
Each image of the engine represents the series itself and not the individual engine.
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
- The Kawasaki FX850V-(F)S42-S is engineered with advanced overhead valve (OHV) technology, a design that places the intake and exhaust valves directly above the combustion chamber for superior "breathing" and efficiency. This vertical valve orientation allows for a more direct and rapid flow of the air-fuel mixture, ensuring the 29.5 HP engine converts every drop of fuel into maximum mechanical energy.
90° V-twin
- The Kawasaki FX850V-(F)S42-S is built on a 90-degree V-twin foundation, a high-performance geometry that provides the perfect mechanical balance. By staggering the cylinders at a precise 90-degree angle, the engine naturally cancels out primary vibrations, delivering a 29.5 HP output that is remarkably smooth and stable.
Pressurized lubrication system
- The Kawasaki FX850V-(F)S42-S is engineered with a high-performance pressurized lubrication system, designed to provide automotive-grade protection to the engine’s most critical internal components. By using a heavy-duty pump to force a constant, high-volume stream of oil to the main bearings and overhead valves, this system ensures that friction is minimized even under the most extreme commercial workloads.
Electronic spark ignition
- The Kawasaki FX850V-(F)S42-S features a high-energy electronic spark ignition system, engineered to provide maintenance-free reliability and effortless starting. This solid-state technology generates a consistently hot, precise spark at the exact millisecond required, ensuring a rapid and complete burn of the air-fuel mixture within the 29.5 HP cylinders.
Automatic compression release
- The Kawasaki FX850V-(F)S42-S is equipped with an automatic compression release (ACR) mechanism, a clever engineering feature that takes the struggle out of every start. During the initial cranking phase, the ACR slightly opens the exhaust valve to vent a small amount of cylinder pressure, making it significantly easier for the starter motor to turn over the massive 29.5 HP V-twin.
High efficiency oil cooler
- The Kawasaki FX850V-(F)S42-S is outfitted with a high-efficiency oil cooler, a critical performance feature designed to maintain stable operating temperatures during grueling commercial shifts. This specialized heat exchanger pulls thermal energy away from the engine oil, ensuring the lubricant retains its viscosity and protective properties even when the 29.5 HP V-twin is pushed to its limit in extreme heat.
Rotating metal grass chopper screen
- The Kawasaki FX850V-(F)S42-S features a rotating metal grass chopper screen, a rugged defense mechanism specifically designed for the high-debris environment of professional mowing. As the screen spins, its heavy-duty metal blades act as a first line of defense, physically shredding grass clippings, leaves, and twigs before they can enter the cooling system.
Multi-Stage canister air filter
- The Kawasaki FX850V-(F)S42-S is equipped with a multi-stage canister air filtration system, a heavy-duty "cyclonic" housing engineered to protect the engine in extreme, zero-visibility dust conditions. This system uses a dual-element approach: a primary outer filter captures the bulk of heavy debris, while a high-efficiency inner safety element blocks microscopic particles from reaching the combustion chamber.
Cast-iron cylinder liners
- The Kawasaki FX850V-(F)S42-S is built with industrial-strength cast-iron cylinder liners, a premium structural feature designed to withstand the high-stress environment of commercial operation. These rugged sleeves provide a much harder and more heat-resistant wear surface than standard aluminum bores, effectively protecting the 29.5 HP engine against internal scuffing and friction.
Metal engine cover with integrated clean out ports
- The Kawasaki FX850V-(F)S42-S is shielded by a heavy-duty metal engine cover featuring integrated clean-out ports, providing a level of durability and maintenance ease that plastic shrouds simply can't match. This robust steel housing is designed to withstand the physical impacts and high vibration of commercial use while serving as a critical component of the engine's thermal management.
Heavy duty shift-type starter
- The Kawasaki FX850V-(F)S42-S is equipped with a heavy-duty shift-type starter, an industrial-grade ignition component built for thousands of high-torque cycles. Unlike standard starters, this "shift-type" mechanism physically engages the starter gear with the flywheel before the motor begins to spin, ensuring a positive, slip-free connection that prevents gear clashing and premature wear.
