The MR21 is a simple, clean design using many of the same principles as the Walker original. At the heart of the MR21 is a Kohler Command engine and a simplified belt driven drive train
- 21 hp, Kohler OHV V-Twin engine, air-cooled
- Tilt-up body completely exposes drive train
- Remote oversized air cleaner for engine
- Belt Driven deck
- 4 gal (15.14 litre) fuel tank
- 8 mph (13 kph) ground speed