New mower manuals added

Lawn mower manuals and engine manuals for the following brands were added over the past few days:

- Husqvarna: 1 mower manual, 1 parts manual
- Kawasaki: 2 engine owner's manuals, 1 engine service manual
- Ryobi: 1 mower manual, 1 parts manual
- Suzuki: 1 engine parts manual

Suzuki engine manuals

Suzuki makes engines for many applications -- ATVs, motorcycles, and even lawn mowers.  Some Suzuki manuals are listed below, with more to be added as they are found.

Parts manuals:
- Suzuki M120X
- Suzuki M123X

Service manuals:
- Suzuki M120X