We provide complete John Deere 400 engine replacement/rebuild kits for your tractor. Our John Deere 400 engines come with all the components you need to install the KOHLER Command PRO CH740 (25HP) or a Honda GX Series.

Repower Specialists prides itself on superior customer service. We offer unlimited technical support throughout the installation process, so if you need help installing your new repowered Honda or KOHLER engine for your John Deere 400 tractor, don’t hesitate to reach out. Additionally, our replacement engine kits come with a "kit guarantee." This means we are sending you everything necessary to swap your old engine with our new one (unless otherwise stated). If you need additional components, please call us and we will get everything sent out free of charge.

These John Deere 400 engine rebuild kits include the following:

• New Engine with 3 Year Commercial Warranty
• Driveline Adapters
• Exhaust
• Mounting Accessories
• Electrical Harness
• Kit guarantee
• Unlimited technical support

Engine Information

Honda GX630 / GX690:

• Fuel Efficient Operation
  • Fuel economy is similar to fuel injection, with the simplicity of carburetion
  • Two-barrel inner-vent carburetor for more precise fuel metering
• High Output Performance
  • Hemispherical combustion chamber
  • Forged steel crankshaft
  • Pressure fed crankshaft bearings
• Proven Reliability
  • High capacity pump facilitates consistent oil delivery
  • Large diameter air intake for superior cooling
  • High efficiency cooling fan

Kohler CH740:

• Advanced Performance
  • Starts effortlessly in all weather conditions, from 0 to 110 degrees
  • Standard 10% governor delivers power faster
• Lasting Durability
  • Automotive-grade head gasket improves durability, reliability and 
  • Hydraulic lifters mean zero maintenance on the valve train
• Service and Support
  • Kohler’s Global network of more than 13,000 dealers stock parts to minimize downtime