Section 1 Safety and General Information General Specifications 1 Power (@3600 RPM, exceeds Society of Automotive Engineers-Small Engine Test Code J1940.) LH630 ................................................................................................................ Maximum............... 16.4 kW (22 HP) Recommended ...... 13.9 kW (18.7 HP) LH640 ................................................................................................................ Maximum............... 17.9 kW (24 HP) Recommended ...... 15.2 kW (20.4 HP) LH685 ................................................................................................................ Maximum...............
18.6 kW (25 HP) Recommended ...... 15.9 kW (21.3 HP) LH690 ................................................................................................................ Maximum............... 19.4 kW (26 HP) Recommended ...... 16.5 kW (22.1 HP) LH750 ................................................................................................................ Maximum............... 20.1 kW (27 HP) Recommended ...... 17.1 kW (22.9 HP) LH755 ................................................................................................................ Maximum............... 20.9 kW (28 HP) Recommended ......
17.7 kW (23.8 HP) LH760 ................................................................................................................ Maximum............... 21.6 kW (29 HP) Recommended ...... 18.4 kW (24.7 HP) LH775 ................................................................................................................ Maximum............... 23.1 kW (31 HP) Recommended ...... 19.7 kW (26.4 HP) Peak Torque LH630 @ 2200 RPM ...................................................................................................................... 48.0 N·m (35.4 ft.
lb.) LH640 @ 2400 RPM ...................................................................................................................... 51.9 N·m (38.3 ft. lb.) LH685 @ 2200 RPM ...................................................................................................................... 54.3 N·m (40.1 ft. lb.) LH690 @ 2400 RPM ...................................................................................................................... 58.1 N·m (42.9 ft. lb.) LH750 @ 2200 RPM ...................................................................................................................... 61.0 N·m (45 ft.
lb.) LH755 @ 2800 RPM ...................................................................................................................... 61.5 N·m (45.4 ft. lb.) LH760 @ 2600 RPM ...................................................................................................................... 61.7 N·m (45.5 ft. lb.) LH775 @ 2400 RPM ...................................................................................................................... 64.6 N·m (47.7 ft. lb.) Bore LH630,LH640 ................................................................................................................................
77 mm (3.03 in.) LH685,LH690 ................................................................................................................................ 80 mm (3.15 in.) LH750,LH755,LH760,LH775....................................................................................................... 83 mm (3.3 in.) Stroke LH630,LH640,LH685,LH690....................................................................................................... 67 mm (2.64 in.) LH750,LH755,LH760,LH775.......................................................................................................
69 mm (2.7 in.) Displacement LH630,LH640 ................................................................................................................................ 624 cc (38.1 cu. in.) LH685,LH690 ................................................................................................................................ 674 cc (41.1 cu. in.) LH750,LH755,LH760,LH775....................................................................................................... 747 cc (45.6 cu. in.) 1 Values are in Metric units. Values in parentheses are English equivalents. Lubricate threads with engine oil prior to assembly. NOTE:
All listed dimensions and tolerances are measured at 20°C (68°F). 1.8