Kawasaki FR691V-S00-S Engine | 23 HP, 1-Inch Vertical Shaft

Overview

Find a replacement powerplant for your riding mower or zero-turn with the Kawasaki FR691V-S00-S vertical-shaft engine. The selected seller advertises this new engine with a 1-inch diameter × 3-5/32-inch crankshaft, electric start and a 15-amp charging system. A muffler is not included.

Kawasaki publishes 23.0 HP at 3,600 RPM and 726cc displacement for the FR691V family. Its OHV V-twin design features pressurized lubrication, cast-iron cylinder liners, electronic ignition and automatic compression release.

Confirm the complete engine specification before ordering. FR691V identifies the engine family; it does not establish shaft dimensions, wiring or fitment for every mower equipped with an FR691V.

Kawasaki FR691V-S00-S Specifications

• Manufacturer: Kawasaki
• Advertised engine specification: FR691V-S00-S
• Engine family: FR Series / FR691V
• Published family power: 23.0 HP at 3,600 RPM
• Displacement: 726cc
• Design: Air-cooled, 4-stroke, OHV V-twin gasoline engine
• Crankshaft orientation: Vertical
• Advertised shaft diameter: 1 inch / 25.4mm
• Advertised shaft length: 3-5/32 inches / 80mm
• Starting system: Electric Bendix starter
• Advertised charging system: 15 amp
• Controls: Separate throttle and choke controls
• Muffler: Not included
• Condition: New, as listed by the seller

Shaft dimensions, charging system, controls and included components above reflect the selected seller’s advertised S00-S configuration. Compare them with your original engine and confirm the complete code of the engine supplied.

Riding Mower and Zero-Turn Engine Fitment

This listing is organized around FR691V-S00-S, rather than a broad mower-model list. An FR691V-equipped mower is a starting point for comparison, not automatic confirmation that this specification will fit.

• Engine identification: Compare the model, full specification code and serial number on your original engine label.
• Crankshaft: Confirm diameter, usable length, keyway and retaining-bolt thread. Measure from the same reference points used in the engine drawing.
• Mounting and clearance: Check mounting holes, engine height and clearance around the air cleaner, exhaust and starter.
• PTO clutch and drive pulley: Confirm shaft engagement, pulley position and belt alignment.
• Electrical system: Match the charging requirements, connector arrangement and mower wiring.
• Controls and exhaust: Verify throttle and choke cable travel, fuel routing and muffler compatibility.

If your original specification differs, have the seller or an authorized Kawasaki Engines dealer confirm the repower application before ordering. No individual mower model is confirmed by this listing.

What’s Included?

One engine in the seller’s advertised FR691V-S00-S configuration. The muffler is not included. Confirm supplied accessories and any components that must be transferred from your existing engine with the seller.

Buy Through the Selected eBay Seller

Use the Buy on eBay button to view the seller’s current price, stock, shipping options and purchase terms. The selected offer is from Equipatron. The seller states that this engine is not available to ship to California.

Payment, fulfillment, returns and any warranty arrangements are handled through the seller’s offer. Price and availability may change.

Frequently Asked Questions

Does this replace every Kawasaki FR691V engine?

No. FR691V engines can have different specification codes and configurations. Compare the complete code and physical requirements before choosing the S00-S offer.

Does this listing use a 1-inch or 1-1/8-inch shaft?

The selected seller advertises a 1-inch diameter × 3-5/32-inch shaft. It should not be treated as a direct replacement for a 1-1/8-inch shaft application.

Can I reuse my existing PTO clutch?

Only if its bore, mounting arrangement and position match the replacement shaft and your mower’s drive system. A matching bore alone does not confirm the complete installation.

Need help identifying your existing engine? Contact PTO Direct USA with your mower model, serial number and clear photos of the engine identification label.

Compare other options in our replacement engine collection, or browse our electric PTO clutch catalog.

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