Walker Model B23 Replacement Engine — Kohler CH680-3175 22.5 HP Command PRO Horizontal Engine Click to zoom

Walker Model B23 Replacement Engine — Kohler CH680-3175 22.5 HP Command PRO Horizontal Engine

MPN Model B23 ENGINE

In stockReplacement Engine

Overview

🚚 Flat-rate LTL freight: $200
Ships palletized by LTL freight to the lower 48 states + DC for a flat $200. Need it fast? Choose Expedited or Need It Fast ($235.95) at checkout and we'll call you with the fastest options.

Need a replacement engine for your Walker Model B23 zero-turn mower? This is a brand-new, genuine Kohler CH680-3175 (Rehlko spec PA-CH680-3175) 22.5 HP Command PRO horizontal-shaft engine — the engine spec used on Walker machines such as the Model B23.

Kohler Engines now operates as Rehlko; same engine, same factory, same part number. Ships new in the crate with the manufacturer's engine warranty.

Before you order: confirm fitment

  • Check the engine tag on your Walker machine: it should read CH680-3175 / PA-CH680-3175.
  • Match crankshaft diameter and length, mounting pattern, PTO/clutch, fuel and wiring connections.
  • Not sure which engine your machine has? Call (646) 666-7225 with your machine model and serial number and we'll confirm the right spec.

Engine specifications

Manufacturer Kohler (now Rehlko)
Part number (MPN) CH680-3175
Rehlko spec number PA-CH680-3175
Series Command PRO
Gross power 22.5 HP
Displacement 674 cc
Cylinders V-twin, OHV
Crankshaft orientation Horizontal
Fuel system Carbureted gasoline
Air cleaner Heavy-Duty Air Cleaner
Starter Electric Start
Charging 15 Amp
Oil capacity 2.0 qt (1.9 L)
Shipping weight 119 lb
Condition New, genuine OEM
Fits Walker Model B23

Frequently asked questions

What engine does the Walker Model B23 use?

This listing is the Kohler CH680-3175 spec (22.5 HP). Always confirm against the tag on your existing engine.

How much is shipping?

Engines ship palletized by LTL freight for a flat $200 to the lower 48 + DC. Expedited / Need It Fast ($235.95) is available at checkout.

Is this the same engine as Kohler CH680-3175?

Yes — this is the same new Kohler/Rehlko engine sold on our Kohler CH680-3175 page, listed here by machine for easy lookup.