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Kawasaki Engines Gasoline Engine Air Cooled V Twin 4 Stroke 23hp 726cc FS691V-FS08S Discussion

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Kawasaki Engines Gasoline Engine Air Cooled V Twin 4 Stroke 23hp 726cc

SKU# FS691V-FS08S
3.7 out of 5 Customer Rating
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Kawasaki Engines Gasoline Engine Air Cooled V Twin 4 Stroke 23hp 726cc
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About this product

Kawasaki Engines Gasoline Engine Air Cooled V Twin 4 Stroke 23hp 726cc

Kawasaki FS series engines are designed to keep emissions down without compromising muscle. Take on tough landscaping jobs and trust that with an SAE-certified FS series engine powering your machine, you'll get the performance the task demands. The FS691V engine carries out the tough work in compact spaces. For zero-turn mowers and lawn tractors, this 4-cycle engine with rotating grass screen and dual element air filter provides optimum productivity and maximum payback.

Features

Overhead V-valves
90 Deg V-twin
Pressurized lubrication system
Electronic spark ignition
Automatic compression release
Dual element air filtration system with reinforced primary filter
Internally vented carburetor with fuel shut-off solenoid
Rotating grass chopper screen
Cast-iron cylinder liners
78 mm bore x 76 mm stroke, 8.2:1 compression ratio

Specifications

Brand Name
Kawasaki Engines
Assembled Weight (lbs)
90.4
Capacity
Oil: 2.1 Qt
Color
Multiple
Country of Origin
United States
Cylinder Count
2
Dry Weight (lbs)
90.4
Engine Displacement (cc)
726
Engine Torque (ft-lbs)
39.6
Fuel Type
Gas
Ignition Source
Electronic

MFG Part # (OEM)
FS691V-FS08S

Material
Cast Iron
Package Contents
Replacement Engine

Product Condition
New

Restrictions
CA Prop 65
Start Type
Electric

UPC
406069000140

Warranty Type
3 Years Limited
Weight (lbs)
90.4

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6 Comments

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Debbie Brixey
2026-06-16T23:54:54.543Z
Joined December 2023

does this engine have a crankshaft that the exposed portion is 1” in diameter and 3 and 5/32” in length???I

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Debbie Brixey
2026-06-16T23:40:43.099Z
Joined December 2023

What dimensions are the crankshaft on this engine?

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Brent Weaver
2026-05-09T14:25:49.377Z
Joined May 2026

Please advise what size crankshaft is on this particular engine.

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David Simpson
2026-05-05T16:44:00.097Z
Joined May 2026

Im looking for an exact swap engine

for my mower this is the numbers on my 23 hp kawasaki

motor. FR691V- CS31-R / E:NO FR691VN65902

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Marc Currence
2026-02-19T01:01:26.284Z
Joined February 2026
Does this engine replace a Kohler command? I'm not so much worried about power, I'm wondering if the mounting bolts are the same.
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Duster Tools
Emblem
2026-02-23T15:53:57.033Z
Joined February 2026

Hi Marc, unfortunately, we cannot answer your question without knowing the Kohler model you are looking to replace.

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