Kohler ECH740-3040 25 HP Command PRO EFI Horizontal Engine, Flush Crankshaft, Remote Air Cleaner, Oil Cooler (for Walker Mowers)

The Kohler ECH740-3040 is a 25 HP 747cc Command PRO EFI V-twin horizontal-shaft engine with flush crankshaft, electronic fuel injection, remote air cleaner, an integrated oil cooler and 25 amp charging. This spec is built for Walker Mowers equipment. Factory spec: ECH740 E16 WALKER (REMOTE A/C).

Kohler Engines now operates under the name Rehlko. This is the same genuine Kohler ECH740-3040 engine (Rehlko spec PA-ECH740-3040); new units may carry Rehlko branding.

Why buy the ECH740-3040 from RFQQQ

• Brand new, genuine Kohler OEM engine backed by the manufacturer's engine warranty
• $200 flat-rate LTL freight to the lower 48 + DC; Expedited / Need It Fast available
• Pro accounts, net terms and POs for dealers, rental yards and landscape contractors
• Real people on the phone at (646) 666-7225 to confirm fitment before you order

Key features

• 25 HP 747cc Command PRO EFI V-twin engine
• Horizontal crankshaft: Flush crankshaft
• Closed-loop electronic fuel injection for easier starts and lower fuel use
• Remote Air Cleaner
• Integrated oil cooler for lower operating temperatures
• Electric Start, 25 Amp charging
• Oil capacity 2.0 qt (1.9 L); Rehlko/Kohler 10W-40 synthetic recommended (OCK-RKC-10440)
• Commercial-duty Command PRO design with cast-iron cylinder liners

Specifications

Fitment and replacement notes

• Factory replacement for older spec ECH740-3031 (Walker).
• Muffler, mounting hardware and OEM-specific brackets are generally not included unless noted — reuse your existing exhaust and hardware.
• Before ordering, match crankshaft diameter and length, mounting pattern, PTO/clutch, fuel and wiring connections to your current engine tag. Not sure? Call (646) 666-7225 with your engine model and spec number and we'll confirm.

Frequently asked questions

Is the ECH740-3040 a Kohler or a Rehlko engine?

Both. Kohler Engines rebranded to Rehlko; the design, factory and part number are unchanged. Kohler ECH740-3040 and Rehlko PA-ECH740-3040 are the same engine.

How much does shipping cost?

Engines ship palletized by LTL freight for a flat $200 to the lower 48 states and DC. Expedited / Need It Fast ($235.95) is available at checkout — we call you with the fastest options.

What is the crankshaft size?

Flush crankshaft (horizontal shaft). Always confirm against your original engine before ordering.

What does the ECH740-3040 replace?

It is the factory replacement for ECH740-3031.

Is this a genuine OEM engine?

Yes — brand new, genuine Kohler engine with the manufacturer's warranty.