Specifi cations ENGINE IDENTIFICATION NUMBERS Kohler engine identifi cation numbers (model, specifi cation and serial) should be referenced for effi cient repair, ordering correct parts, and engine replacement. Model . . . . . . . . . . . . . . . . . . . . . LH630 Liquid Cooled Horizontal Shaft Numerical Designation Specifi cation . . . . . . . . . . . . . . . LH630-0001 Serial . . . . . . . . . . . . . . . . . . . . .
4123500328 Year Manufactured Code Factory Code Code Year 41 2011 42 2012 43 2013 GENERAL SPECIFICATIONS 3,6 LH630 LH640 LH685 LH690 LH750 LH755 TORQUE SPECIFICATIONS 3,5 LH630 LH640 LH685 LH690 LH750 LH755 Carburetor and Intake Manifold Closure Plate Connecting Rod Crankcase Cylinder Head 3 Values are in Metric units. Values in parentheses are English equivalents. 4 Exceeding maximum angle of operation may cause engine damage from insuffi cient lubrication. 5 Lubricate threads with engine oil prior to assembly. 6 Any and all horsepower (hp) references by Kohler are Certifi ed Power Ratings and per SAE J1940 & J1995 hp standards.
Details on Certifi ed Power Ratings can be found at KohlerEngines.com. 6 KohlerEngines.com 66 690 01 Rev. C Bore 77 mm (3.03 in.) 80 mm (3.15 in.) 83 mm (3.3 in.) Stroke 67 mm (2.64 in.) 69 mm (2.7 in.) Displacement 624 cc (38.1 cu. in.) 674 cc (41.1 cu. in.) 747 cc (45.6 cu. in.) Oil Capacity (refi ll) 1.6-1.8 L (1.7-1.9 U.S. qt.) Maximum Angle of Operation (@ full oil level)4 20° Intake Manifold Fastener (torque in 2 increments) fi rst to 7.4 N·m (66 in. lb.) fi nally to 9.9 N·m (88 in. lb.) Thermostat Housing Mounting Fastener 6.2-7.3 N·m (55-65 in. lb.) Carburetor Mounting Fastener 9.9 N·m (88 in. lb.) Closure Plate Fastener 24.4 N·m (216 in.
lb.) Cap Fastener (torque in increments) 11.3 N·m (100 in. lb.) Breather Cover Fastener 10.7 N·m (95 in. lb.) into new hole 7.3 N·m (65 in. lb.) into used hole Oil Drain Plug 13.6 N·m (10 ft . lb.) Cylinder Head Fastener (torque in 2 increments) fi rst to 16.9 N·m (150 in. lb.) fi nally to 33.9 N·m (300 in. lb.) Rocker Pivot Fastener 11.3 N·m (100 in. lb.)