23.0 hp

The FS691V engine carries out the tough work in compact spaces.

For zero-turn mowers and lawn tractors, this 4-cycle engine with rotating grass screen and dual element air filter provides optimun productivity and maxiumum payback.

  • Overhead V-valve
  • Integrated clean out ports
  • 90° V-twin
  • Pressurized lubrication system
  • Electronic spark ignition
  • Automatic compression release
  • Internally vented carburetor with fuel shut-off solenoid
  • Rotating metal grass chopper screen
  • Dual element air filtration system with reinforced primary filter
  • Cast-iron cylinder liners
726 cc (44.3 cu. in.)
Number of Cylinders
Bore x Stroke
3.1 x 3.0 in. (78 x 76mm)
Compression Ratio
Oil capacity w/filter
2.1 U.S. qt ( 2.0 liters)
Maximum Power
23.0 hp (17.2 kW)
at 3,600 RPM
Maximum Torque
39.9 ft lbs (54.1 N·m)
at 2,200 RPM
Dry Weight (without muffler)
90.4 lbs (41.0 kg)