Engine Identification Numbers - Kohler Command CH20 Service Manual

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.
GENERAL SPECIFICATIONS
Bore
Stroke
Displacement
Oil Capacity (refi ll)
Maximum Angle of Operation (@ full oil level)
TORQUE SPECIFICATIONS
Blower Housing and Sheet Metal
M5 Fasteners
M6 Fasteners
Carburetor and Intake Manifold
Intake Manifold Mounting Fastener (torque in 2
increments)
M6 Mounting Screw or Nut
Closure Plate
Fastener
Connecting Rod
Cap Fastener (torque in increments)
8 mm straight shank
8 mm step-down
6 mm straight shank
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
7 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
Model . . . . . . . . . . . . . . . . . . . . . CH640
Command Engine
Horizontal Shaft
Numerical Designation
Specifi cation . . . . . . . . . . . . . . . CH640-0001
Serial . . . . . . . . . . . . . . . . . . . . . 4923500328
Year Manufactured Code
Code Year
49 2019
50 2020
51 2021
4,7
5
4,6
KohlerEngines.com
Factory Code
CH18/CH20/
CH640 CH23
77 mm 80 mm
(3.03 in.) (3.15 in.)
67 mm (2.64 in.)
624 cc 674 cc
(38 cu. in.) (41 cu. in.)
1.6-1.8 L (1.7-1.9 U.S. qt.)
CH18/CH20/
CH640 CH23
6.2 N·m (55 in. lb.) into new holes
4.0 N·m (35 in. lb.) into used holes
10.7 N·m (95 in. lb.) into new holes
7.3 N·m (65 in. lb.) into used holes
fi rst to 7.4 N·m (66 in. lb.)
fi nally to 9.9 N·m (88 in. lb.)
6.2-7.3 N·m (55-65 in. lb.)
24.4 N·m (216 in. lb.)
22.7 N·m (200 in. lb.)
14.7 N·m (130 in. lb.)
11.3 N·m (100 in. lb.)
CH25/
CH730/CH740
83 mm (3.27 in.)
725 cc
(44 cu. in.)
25°
CH25/
CH730/CH740
24 690 30 Rev. G