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Kohler Command CV20 - Service Manual

Kohler Command CV20
92 pages
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124 690 07 Rev. H KohlerEngines.com
CV17-CV25, CV620-CV730, CV740, CV750
Service Manual
2 Safety
3 Maintenance
5 Specications
16 Tools and Aids
19 Troubleshooting
23 Air Cleaner/Intake
24 Fuel System
30 Governor System
31 Lubrication System
33 Electrical System
49 Starter System
58 Disassembly/Inspection and Service
75 Reassembly
IMPORTANT: Read all safety precautions and instructions carefully before operating equipment. Refer to operating
instruction of equipment that this engine powers.
Ensure engine is stopped and level before performing any maintenance or service.

Questions and Answers

  • D
    daniel46Nov 15, 2025
    How to fix a Kohler Command CV20 that cranks but won't start?
    • P
      Patrick WalkerNov 15, 2025
      If your Kohler Engine cranks but won't start, possible causes include a backwards battery connection (correct it), a blown fuse (replace it), or a malfunctioning carburetor solenoid (repair or replace it). Other potential issues are a choke not closing (ensure proper function), a clogged fuel line or filter (clear the clog), or a failed diode in the wiring harness (replace it). Also, check for an empty fuel tank (refill it), a faulty electronic control unit (replace it), faulty ignition coils or spark plugs (replace them), a malfunctioning fuel pump (repair or replace it and check hoses), or a closed fuel shut-off valve (open it). Furthermore, inspect the ignition module(s) (fix or replace), ensure adequate voltage to the electronic control unit, check the interlock switch (repair if neede...

Summary

Safety

Maintenance

Maintenance Schedule

Outlines routine maintenance tasks by hours or annually.

Specifications

Engine Dimensions

Provides detailed measurements for various engine configurations and air cleaner types.

Engine Identification and General Specifications

Details engine identification numbers and key operational specifications.

Torque Specifications

Lists recommended torque values for various fasteners and components.

Clearance Specifications

Provides critical measurement tolerances for engine components.

General Torque Values

Standard torque recommendations for common fastener grades and sizes.

Tools and Aids

Separate Tool Suppliers

Lists vendors for specialized tools and their contact information.

Service Tools and Aids

Lists specific tools, aids, lubricants, and their part numbers for service.

DIY Tool Construction

Describes how to make simple tools like a flywheel holder and rocker arm wrench.

Troubleshooting

Troubleshooting Guide and Common Issues

Provides general advice and lists common engine problems and their causes.

Engine Performance and System Diagnostics

Covers diagnostic tests like crankcase vacuum, compression, and leakdown tests.

Ignition System Troubleshooting

Details procedures for testing ignition modules, SAMs, and spark.

Charging System Testing

Outlines tests for rectifier-regulators and charging system output.

Air Cleaner;Intake

Air Cleaner Systems and Servicing

Describes different types of air cleaners and procedures for their maintenance.

Breather Tube and Air Cooling

Covers breather tube connection and the importance of engine air cooling.

Fuel System

Fuel System Components and Operation

Describes the fuel system, its components, and how it works.

Fuel Pump Service and Troubleshooting

Details fuel pump replacement, testing, and common issues.

Carburetor Operation and Adjustments

Explains carburetor function, components, adjustments, and servicing.

Governor System

Governor System Overview and Adjustments

Explains the governor's function, components, adjustments, and sensitivity settings.

Lubrication System

Oil Change and Filter Service

Procedures for changing engine oil and filter, and related components.

Oil Cooler and Oil Sentry System

Covers oil cooler maintenance and the function/testing of the Oil Sentry system.

Oil Pan and Governor Gear Assembly Service

Details oil pan removal and inspection of the governor gear assembly.

Oil Pump Assembly and Service

Details disassembly, inspection, and reassembly of the oil pump.

Oil Seal Installation

Describes the procedure for installing the oil seal in the oil pan.

Oil Pan Installation

Details the steps for installing the oil pan assembly to the crankcase.

Electrical System

Spark Plugs and Battery

Covers inspection/service of spark plugs and battery requirements.

Ignition Systems Overview and Wiring Diagrams

Explains different ignition systems, components, and provides wiring schematics.

Ignition System Testing

Details procedures for testing ignition modules, SAMs, and spark.

Charging System Testing

Outlines tests for rectifier-regulators and charging system output.

Starter System

Starter System Troubleshooting

Addresses common starting difficulties and their causes.

Inertia Drive Starter Service

Covers components, service, and disassembly for inertia drive starters.

Solenoid Shift Starter Service

Details solenoid shift starter components, disassembly, testing, and reassembly.

Retractable Starter Service

Explains components, removal, rope replacement, and pawl service for retractable starters.

Disassembly;Inspection and Service

External Engine Components Disassembly

Describes removal of external parts like guards, housing, and filters.

Fuel System Components Removal

Covers removal of air cleaner, fuel pump, and carburetor.

Controls and Governor Removal

Details removal of throttle controls, governor, and carburetor linkages.

Cylinder Head and Valve Train Disassembly

Explains procedures for removing and disassembling cylinder heads and valves.

Crankshaft, Piston, and Connecting Rod Removal

Covers the removal of major rotating internal engine parts.

Crankcase and Oil System Component Removal

Details removal of oil pan, oil pump, and related parts.

Reassembly

Connecting Rods, Crankshaft, and Camshaft Installation

Covers reassembly of major internal engine rotating parts.

Oil System and Crankcase Reassembly

Details installation of the oil pan and oil pump assembly.

Flywheel, Ignition, and Fan Assembly

Guides the reinstallation of the flywheel, ignition components, and fan.

Cylinder Head and Valve Train Reassembly

Explains how to install cylinder heads, valves, push rods, and rocker arms.

Carburetor, Controls, and External Components Reassembly

Covers reinstallation of the carburetor, fuel system, and engine controls.

Final Engine Assembly and Testing

Details final steps like muffler, oil filter installation, and initial engine testing.

Kohler Command CV20 Specifications

General IconGeneral
BrandKohler
ModelCommand CV20
CategoryEngine
LanguageEnglish

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