FR691V-ES18S - Engine VTwin 23HP
STD 1.125X100MM PTO
New Kawasaki FR691V 23 HP V-Twin Engine
| Spec: FR691V-ES18S
Get your zero-turn mower back to peak performance with a brand new, factory fresh Kawasaki FR691V 23 HP V-Twin vertical engine. Known as the ultimate premium residential workhorse, this 726cc 4-stroke engine delivers heavy-duty power, smooth operation, and long-lasting performance.
This specific build config (Spec: ES18S) features the highly demanded Standard 1.125" x 100mm Power Take-Off (PTO) output shaft. This provides maximum durability for electronic clutch and pulley systems.
⚙️ Engine Specifications & Features:
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Model/Spec: FR691V-ES18S (Latest updated factory revision)
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Power Output: 23 Gross HP @ 3600 RPM
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Displacement: 726cc ($V\text{--}Twin$ 90° overhead valve design)
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Crankshaft PTO Size: 1.125" Diameter x 100mm Length ($1\text{--}1/8" \times 3\text{--}15/16"$)
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Starter: 12V Bendix Electric Start
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Charging System: 15 Amp alternator output
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Fuel System: Carburetor with fuel shut-off solenoid & pulse fuel pump
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Lubrication: Full high-pressure lubrication system with spin-on oil filter
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Cooling/Debris Protection: Integrated top rotating metal grass screen prevents overheating.
🚜 Equipment Compatibility:
This 1.125" x 100mm PTO configuration is used widely on premium residential and commercial zero-turn mower lines. It serves as a direct factory bolt-on swap for models manufactured by:
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Ariens / Gravely
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Hustler Mowers
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Toro / Exmark
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Scag & Ferris platforms
⚠️ Critical Buyer Notes (Read Before Buying!)
1. Confirm Your Shaft Profile: Kawasaki builds the FR691V engine with multiple crankshaft variants. Do not order by HP alone! Verify that your old engine’s output shaft is 1.125 inches thick ($1\text{--}1/8"$) and exactly 100mm long out from the crankcase base to prevent return hassle.
2. Muffler Not Included: Like all replacement engines shipped straight out of the Kawasaki factory, this unit does not include a muffler system. You will simply bolt on and transfer your equipment's existing muffler assembly.
3. Emissions Warning: Due to strict state-level environmental regulations, this engine cannot be shipped to California addresses.
📦 Box Contents:
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1x Brand New Kawasaki FR691V-ES18S Engine
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1x Official Owner's/Service Manual
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Factory Exhaust Mounting Gaskets
🚀 Safe Crate Shipping & Handling
This 90+ lb engine is securely strapped, braced, and cushioned inside its original factory heavy-duty single-carton crate to guarantee it arrives completely safe, with no damage to the electrical harness or vertical shaft. We dispatch heavy items quickly so you can minimize down-time and get your machine back onto the turf!
Unsure if the ES18S wiring or linkage bracket matches your old mower setup? Send us a message with your mower's model code and the code on your old engine's white barcode decal. We will gladly check the factory compatibility database for you!
