Our array of horizontal shaft Kawasaki FH Horizontal garden mower engines, which incorporate FH601D-S01, FH721D-S08, FH721D-S01 and FH770D-S01. They're 25 HP or 19 HP horizontal shaft engines.
https://www.carrollstream.com/kawasaki-fh601d-s01-motor-p/fh601d-s01.htm