Rehlko Command Pro EFI ECH740-3140

25 HP Electric Start With 1 7/16" Diameter x 4.46" Length Shaft

Key switch and Air Cleaner (remote mounted) not included

Requires Extra Kit if going on a Walker

The Rehlko Command Pro EFI ECH740-3040 is a commercial-grade 25 HP electronic fuel injected engine designed for demanding mower, generator, utility, and industrial applications that require dependable power, fuel efficiency, and long-term durability. Built with a 747cc 4-stroke OHV V-Twin platform, this engine is designed to deliver consistent performance in changing working conditions while helping reduce fuel waste compared to traditional carbureted engines.

This model is commonly referenced for E16 Walker applications and replaces ECH740-3031 and ECH740-3025. It is engineered for equipment requiring a flush crankshaft configuration, making it a strong option for specific commercial mower and machinery setups where exact fitment matters. If installing on a Walker, an additional kit is required, so confirming compatibility before purchase is important.

One of the biggest advantages of the ECH740-3040 is its Electronic Fuel Injection (EFI) system. EFI continuously adjusts fuel delivery based on operating conditions, helping improve cold starts, throttle response, fuel efficiency, and overall engine consistency. For commercial operators who rely on daily performance, this can mean smoother operation, less downtime, and more dependable power across different temperatures and working loads.

This engine also features a heavy-duty electric start system, 25 AMP charging system with regulator, and pressure lubrication system for lasting reliability. With 38.8 ft-lbs of peak torque at 2,600 RPM, the ECH740-3040 delivers strong low-end pulling power for demanding commercial equipment. Its rugged internal construction and forced air cooling system make it well suited for landscaping crews, fleet operators, and professionals who need an engine that can handle repeated heavy use.

At Carroll Stream Motor Company, we offer premium Rehlko engines backed by a knowledgeable Michigan-based team. If you need help confirming Walker fitment, required accessory kits, or installation details, call 1-888-208-2088 for expert support.

Key Features and Benefits

• 25 HP commercial-grade EFI engine
• 747cc 4-stroke OHV V-Twin design
• Electronic Fuel Injection (EFI) for improved fuel efficiency and performance
• Flush crankshaft configuration for specialized equipment fitment
• Electric start with 12-volt heavy-duty starter
• 25 AMP charging system with regulator
• 38.8 ft-lbs peak torque at 2,600 RPM
• Pressure lubrication system
• Forced air cooling
• Remote air cleaner setup
• 4-bolt mounting pattern
• 3-year consumer warranty
• 3-year commercial warranty

Ideal Applications

The Rehlko ECH740-3040 is well suited for:

• Walker mower replacement applications
• Commercial zero-turn mowers
• Utility vehicles
• Commercial generators
• Industrial equipment
• Specialty machinery requiring a flush crankshaft engine

Why Choose the Rehlko ECH740-3040?

The ECH740-3040 is a strong choice for buyers who need EFI performance with commercial-grade durability. Compared to standard carbureted engines, the EFI system helps deliver more precise fuel control, better startup reliability, and smoother operation in varying temperatures and working conditions.

This engine also stands out for its flush crankshaft design, which is critical for certain mower and equipment applications. Because it replaces older Rehlko/Kohler EFI models and supports Walker-spec use, it is a smart option for fleet owners, repair shops, and commercial operators who need a dependable replacement with modern fuel delivery technology.

Frequently Asked Questions

What is the Rehlko ECH740-3040 used for?

The Rehlko ECH740-3040 is used for Walker mower applications, commercial zero-turn mowers, generators, utility vehicles, and industrial equipment that require a 25 HP EFI flush crankshaft engine.

What does the ECH740-3040 replace?

This engine replaces ECH740-3031 and ECH740-3025.

Is the Rehlko ECH740-3040 an EFI engine?

Yes. The ECH740-3040 uses Electronic Fuel Injection (EFI) to improve fuel delivery, engine response, and operating consistency.

Does this engine have a flush crankshaft?

Yes. The ECH740-3040 is built with a flush crankshaft configuration for specific equipment applications.

Does the ECH740-3040 include a key switch?

No. The key switch is not included.

Does the ECH740-3040 include the air cleaner?

No. The remote-mounted air cleaner is not included.

Does this engine include a fuel tank or muffler?

No. The engine does not include a fuel tank or muffler.

Does this engine fit Walker equipment?

Yes, it is referenced for E16 Walker applications, but an extra kit is required if installing on a Walker.

What is the torque output of the ECH740-3040?

The engine produces 38.8 ft-lbs of peak torque at 2,600 RPM.

What warranty comes with the Rehlko ECH740-3040?

The engine includes a 3-year consumer warranty and a 3-year commercial warranty.

Boost your equipment’s performance today – Order the Rehlko Command Pro EFI ECH740-3040 now! Call 1-888-208-2088 for expert guidance and fast, free shipping from Carroll Stream Motor Company.

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*This Item ships by freight. FREE SHIPPING to a commercial address with a loading dock or fork lift. Residential Delivery will be extra. Please contact us for more information.