Description
Kawasaki FR691V S06-S Vertical Engine – Professional Overview
The Kawasaki FR691V S06-S vertical engine is part of Kawasaki’s FR Series of gasoline-powered engines. The supplied specifications identify this model as FR691V-CS06S, with a 726cc displacement and a 23.0 HP output.
Its V-twin, 4-cycle OHV configuration provides the engine architecture required for compatible outdoor power equipment. The vertical crankshaft orientation is particularly important when selecting a replacement engine because equipment driveline geometry depends on the crankshaft configuration.
The engine uses gasoline and is equipped with an electric-start system. The supplied product information also identifies a 15-amp charging coil, providing electrical charging capability for compatible equipment systems.
The product listing notes that the pictured engine represents the basic series model and that the specific engine may include or exclude features that are not shown in the image. Buyers should therefore use the written specifications and model number as the primary product references.
Engine Design and Performance
The FR691V-CS06S uses a 726cc V-twin engine configuration with two cylinders. Its OHV design is intended for applications requiring a compact gasoline engine with the power characteristics associated with the Kawasaki FR Series.
The engine has a listed maximum speed of 3,600 RPM. This specification is important when evaluating compatibility with equipment because the engine’s operating characteristics must correspond with the requirements of the machine in which it will be installed.
The vertical crankshaft is another critical specification. The crankshaft measures 1-1/8 inches in diameter and has a listed length of 108.8mm.
These dimensions should be compared against the original engine and equipment specifications before ordering. Crankshaft diameter and length can directly affect pulley, blade, clutch, or other equipment-interface compatibility.
Fuel, Air, and Lubrication Systems
The FR691V S06-S uses a gasoline fuel system and an internally vented carburetor equipped with a fuel shut-off solenoid.
Air filtration is handled through a single-stage air filter. Proper air filtration is important for outdoor power equipment because these engines commonly operate in environments where dust, grass, and other airborne debris may be present.
The listed oil capacity is 2.2 quarts. Buyers and equipment technicians should follow the appropriate engine and equipment service requirements when selecting and adding engine oil.
The supplied information identifies the engine as air-cooled. This configuration eliminates the need for a liquid-cooling radiator system and is consistent with the type of power equipment applications for which this engine category is commonly used.
Crankshaft and Equipment Compatibility
When selecting a vertical replacement engine, the crankshaft is one of the most important specifications to verify.
This Kawasaki FR691V vertical engine uses a 1-1/8-inch crankshaft with a listed length of 108.8mm. The vertical orientation must also match the equipment’s original engine configuration.
A replacement engine can have the correct displacement and horsepower but still be unsuitable if its crankshaft dimensions, mounting arrangement, or other interfaces do not match the equipment.
For this reason, buyers should compare the FR691V-CS06S model number, crankshaft orientation, diameter, length, and equipment requirements before purchasing.
Electrical Starting and Charging
The FR691V S06-S is equipped with electric start, providing convenient engine starting for compatible equipment.
The specification also identifies a 15-amp charging coil. This component supports the electrical requirements of compatible equipment and should be considered when replacing an existing engine with a different electrical configuration.
Because electrical systems can vary between equipment models, buyers should confirm that the engine’s starting and charging configuration matches the machine being serviced.
Who This Engine Is Best For
The Kawasaki FR691V S06-S is best suited to equipment owners, repair professionals, landscapers, maintenance technicians, and other buyers looking for a compatible 23.0 HP Kawasaki vertical engine.
It is particularly relevant when the existing equipment requires a 726cc V-twin gasoline engine with a vertical crankshaft and compatible crankshaft dimensions.
The engine may be appropriate for replacement applications where the existing power unit is worn, damaged, or otherwise due for replacement. However, the product should not be selected solely by horsepower or displacement.
Crankshaft dimensions, orientation, starting system, mounting requirements, and equipment compatibility should all be checked before ordering.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Kawasaki |
| Model | FR691V S06-S / FR691V-CS06S |
| Series | FR Series |
| Engine Type | 4-Cycle OHV V-Twin |
| Displacement | 726cc |
| Power | 23.0 HP |
| Cylinders | 2 |
| Crankshaft Orientation | Vertical |
| Crankshaft Diameter | 1-1/8 in. |
| Crankshaft Length | 108.8mm |
| Fuel System | Gasoline |
| Starting System | Electric Start |
| Charging Coil | 15 Amp |
| Air Cleaner | Single Stage Air Filter |
| Carburetor | Internally Vented with Fuel Shut-Off Solenoid |
| Oil Capacity | 2.2 qt |
| Maximum RPM | 3,600 RPM |
| Cooling | Air-Cooled |
| Warranty | 3 Years |
| Muffler | Without Muffler |
Important Fitment Considerations
Before purchasing the Kawasaki FR691V-CS06S, compare the engine’s specifications with the equipment’s existing power unit.
Pay particular attention to the vertical crankshaft orientation, 1-1/8-inch crankshaft diameter, and 108.8mm crankshaft length. These dimensions can determine whether the engine interfaces correctly with the equipment’s existing drive components.
The electric-start and 15-amp charging configuration should also be checked against the equipment’s electrical system.
The supplied product information states that the engine is without a muffler. Buyers should account for this when evaluating the complete replacement requirements of their equipment.
Ordering, Warranty, and Product Support
The FR691V S06-S is listed with a 3-year warranty, giving buyers a defined warranty period for the engine.
The product listing also notes that the image represents the basic series model and that specific features may vary from what is shown in the image. For this reason, the written product specifications and model designation should be reviewed carefully before ordering.
Customers replacing an existing engine should have the original engine model information and crankshaft measurements available when verifying compatibility.
For additional options, buyers can also compare this engine with other Kawasaki vertical engines, compatible replacement engines, and related outdoor power equipment engine products.
Frequently Asked Questions
What is the Kawasaki FR691V S06-S engine?
The Kawasaki FR691V S06-S is a 726cc, 23.0 HP, 4-cycle OHV V-twin gasoline engine with a vertical crankshaft. The supplied model designation is FR691V-CS06S. It is designed for compatible outdoor power equipment requiring the specified engine configuration and crankshaft dimensions.
What are the crankshaft dimensions?
The engine has a 1-1/8-inch crankshaft diameter and a listed 108.8mm crankshaft length. It uses a vertical crankshaft orientation. These measurements are important for replacement applications because the crankshaft must interface correctly with the equipment’s existing drive components.
Does the FR691V-CS06S have electric start?
Yes. The supplied specifications identify the Kawasaki FR691V S06-S as an electric-start engine. It also includes a 15-amp charging coil, although buyers should verify that their equipment’s electrical system is compatible with this configuration.
How much oil does the Kawasaki FR691V S06-S hold?
The listed oil capacity is 2.2 quarts. Buyers should follow the appropriate service requirements for their specific engine and equipment application when selecting and filling engine oil.
Does this Kawasaki engine include a muffler?
The supplied specifications identify this particular configuration as without a muffler. Buyers should account for the exhaust requirements of their equipment and verify what additional components may be needed for their installation.
What is the maximum RPM of the FR691V S06-S?
The listed maximum engine speed is 3,600 RPM. This specification should be considered when evaluating replacement compatibility because the equipment’s drive system and operating requirements must be suitable for the engine’s specified operating range.
How do I verify that this Kawasaki engine will fit my equipment?
Compare the original engine and equipment requirements with the FR691V-CS06S model, 726cc displacement, 23.0 HP output, vertical crankshaft, 1-1/8-inch crankshaft diameter, and 108.8mm crankshaft length. Also verify the electrical starting and charging configuration before ordering.
