Gravely and Yamaha Power News & Opinion

New Yamaha MX-V V-Twin Engines – Yamaha Zero-Turn Mowers

Yamaha MX-V V-Twin Engines

Yamaha MX-V V-Twin Engines

When you look at the rear of a zero-turn mower, you’re likely to find one of three engines. It is no secret that Briggs & Stratton, Kawasaki, and Kohler have a strong-hold on the mower engine market. Most of the mower manufacturers, consumer and pro, power their sleds with one of these three. The new Yamaha MX-V V-Twin engines may be changing this game a bit.

Not only has Yamaha made these MX-V V-Twin engines available for repower, but Yamaha is also working with some key manufacturers. You can now buy a Yamaha powered zero-turn, from Bad Boy Mowers and Gravely. We’re sure to see more companies make these available on their mowers. Competition is typically a good thing, and this is not Yamaha’s first rodeo. We’re excited to see what’s in store for the engine market.


Yamaha MX-V V-Twin Engines Features

Yamaha Powered BadBoy Mower

Yamaha Powered BadBoy Mower

The Yamaha MX-V V-Twin engines are available in a variety of sizes and options. Yamaha makes the V-Twin in EFI or carbureted. The new MX825V and MX800V are carbureted engines,  designed for high fuel efficiency, while not sacrificing performance.This line of Yamaha MX-V V-Twin engines deliver power and torque curves specifically designd for the OPE industry.

Spark delivery is from Yamaha’s proven TCI (Transistor Controlled Ignition) system. This same type TCI ignition can be found on their motorcycles, boat motors, and other small engines. Moreso, the Yamaha MX-V V-Twin engines also come with a ball-bearing supported P.T.O. Finally, a stainless steel tuned muffler is available as an option. Finally, the Yamaha engines, including the optional muffler, come with a 3-year warranty.

Ball Bearing P.T.O

Ball Bearing P.T.O

This MX-V V-Twin is not just a copy either. Yamaha started from scratch, designing this series from the ground up. Let’s be honest, you may not have ridden a Yamaha zero-turn, but you’re probably familiar with Yamaha power. From motorcycles, to UTVs, and even cars, Yamaha has been building powerplants for many decades. It’s not like this is a far stretch for the engine manufacturer. At the same time, will they win over industry pros that rely on the “other” three?

Power Options

The power for the Yamaha MX-V V-Twin engine series range from the MX800V 26.5HP to the MX825V-EFI producing 33.8HP. The MX800V and MX825V are carbuerated models, while the MX775V-EFI, MX800V-EFI, and MX825V-EFI include Electronic Fuel Injection (EFI).

Yamaha Mower Engines Schematic

Yamaha Mower Engines Schematic

Our Take

The outdoor power equipment world is in a growth pattern. More and more lawn and landscaping business continue to start and expand. The addition of Yamaha engines as an option for power should be a good thing. Yamaha has a great history with making efficient power, while also providing durability. Our curiosity peaks at how many other manufacturers will make the Yamaha a factory option. We are yet to drive or ride on a mower powered by the new Yamaha MX-V V-Twin engines. We’ll do our best to lineup a review, so we can give our first-hand experience.

To find out more on the Yamaha MX-V V-Twin Engines, click here .


Yamaha MX-V V-Twin Engine Specifications

Yamaha Mower EnginesMX825V-EFI

  • Displacement: 824cc
  • Max Power: 25.2kW (33.8 hp)
  • @ 3600 RPM
  • Max Torque: 67.9 Nm
  • Bore x Stroke80 x 82 mm (3.15 x 3.23 in.)
  • Compression Ratio9.1:1Max Power (Gross)*25.2 kW (33.8 PS) @ 3600 rpm
  • Certified SAE J1995 Gross Rated Power**24.6 kW (33 hp) @3600 rpm
  • Gross Torque67.9 Nm (50.1 ft-lbf) @ 3100 rpm
  • FuelUnleaded; Ethanol Content of 10% or less
  • Fuel SystemDelphi Multec – EFI
  • Fuel Tank CapacityNA
  • Ignition SystemECU Controlled Electronic Ignition Coils
  • Starting/Charging SystemElectric Starter Only; US Standard = 25 A Charging (other Amperages available)
  • Spark PlugNGK® BPR6ES
  • Lubrication SystemPressurized Lubrication
  • Oil Capacity2.0 L (2.11 qt)
  • Dry Weight60 kg (132 lb)
  • Dimensions (L**xWxH)499 x 463 x 639 mm (19.65 x 18.23 x 25.16 in.)


  • Displacement: 824cc
  • Max Power: 23.6kW (31.6 hp)
  • @ 3600 RPM
  • Max Torque: 65.3 Nm


  • Displacement: 824cc
  • Max Power: 22.1kW (29.6 hp)
  • @ 3600 RPM
  • Max Torque: 62.0 Nm


  • Displacement: 824cc
  • Max Power: 20.7kW (27.8 hp)
  • @ 3600 RPM
  • Max Torque: 63.2 Nm


  • Displacement: 824cc
  • Max Power: 19.8kW (26.5 hp)
  • @ 3600 RPM
  • Max Torque: 62.1 Nm



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