Kohler CH18 User Manual

Specifi cations
724 690 06 Rev. P KohlerEngines.com
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 . . . . . . . . . . . . . . . . . . . . . CH620
Command Engine
Horizontal Shaft
Numerical Designation
Specifi cation . . . . . . . . . . . . . . . CH620-0001
Serial . . . . . . . . . . . . . . . . . . . . . 5023500328
Year Manufactured Code Factory Code
Code Year
50 2020
51 2021
52 2022
GENERAL SPECIFICATIONS
4,7
CH18/CH20/
CH22/
CH620/CH621/
CH640/CH641
CH22/CH23/
CH620
8
/
CH640
8
/
CH670/CH680
CH25/
CH730/
CH740 CH750
Bore
77 mm
(3.03 in.)
80 mm
(3.15 in.) 83 mm (3.27 in.)
Stroke 67 mm (2.64 in.)
69 mm
(2.7 in.)
Displacement
624 cc
(38 cu. in.)
674 cc
(41 cu. in.)
725 cc
(44 cu. in.)
747 cc
(46 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)
5
25°
TORQUE SPECIFICATIONS
4,6
CH18/CH20/
CH22/
CH620/CH621/
CH640/CH641
CH22/CH23/
CH620
8
/
CH640
8
/
CH670/CH680
CH25/
CH730/
CH740 CH750
Auto Choke
eChoke
™
Stepper Motor Lever Set Screw
Stepper Motor Bracket Assembly to Carburetor
Screws
0.4 N·m (3.5 in. lb.)
4.0 N·m (35 in. lb.)
Blower Housing and Sheet Metal
M5 Fasteners 6.2 N·m (55 in. lb.) into new holes
4.0 N·m (35 in. lb.) into used holes
M6 Fasteners 10.7 N·m (95 in. lb.) into new holes
7.3 N·m (65 in. lb.) into used holes
Carburetor and Intake Manifold
Intake Manifold Mounting 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.)
M6 Mounting Screw 6.2-7.3 N·m (55-65 in. lb.)
Adapter (for Heavy-Duty Air Cleaner) Mounting
Fastener
7.3 N·m (65 in. lb.)
4
Values are in Metric units. Values in parentheses are English equivalents.
5
Exceeding maximum angle of operation may cause engine damage from insuffi cient lubrication.
6
Lubricate threads with engine oil prior to assembly.
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.
8
CH620/CH640 engines changed from 624cc to 674cc; displacement can be confi rmed on engine nameplate.

Kohler CH18 Specifications

General

Brand	Kohler
Model	CH18
Category	Engine
Language	English