Kohler Command PRO CH740

24 590 48 Rev. --
KohlerEngines.com
Owner's Manual
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.
Warranty coverage as outlined in the warranty card and on KohlerEngines.
com. Please review carefully as it provides your specifi c rights and obligations.
To maintain compliance with applicable emission regulations, exhaust system
backpressure may not exceed limits which can be found on KohlerEngines.
com. Search by Model No., then select Specs tab.
Kohler Engines has published CO2 values on KohlerEngines.com website.
Record engine information to reference when ordering parts or obtaining warranty coverage.
Engine Model
Specifi cation
Serial Number
Purchase Date
CH640, CH730, CH740
Liquefi ed Petroleum Gas (LPG) or LPG/Natural Gas (NG) Fueled

Kohler Command PRO CH740 Specifications

General

Displacement	725 cc
Compression Ratio	8.5:1
Fuel System	Carburetor
Starter	Electric
Engine Type	4-cycle OHV
Power	25 hp (18.6 kW)
Oil Capacity	2.0 U.S. quarts (1.9 liters)
Ignition System	Electronic
Lubrication	Full Pressure

Summary

Pre-Start Checklist

Starting and Stopping Procedures

Cold Weather Starting Hints

Tips for starting the engine in cold weather conditions, including oil choice and load disengagement.

Stopping the Engine

Procedure for safely shutting down the engine, including disengaging loads and managing fuel.

Angle of Operation

Guidance on the maximum permissible angle for engine operation to prevent damage.

Engine Speed Management

Warning against tampering with governor settings to prevent hazardous overspeed.

Maintenance Instructions

Oil Recommendations and Service

Oil Recommendations

Guidance on selecting appropriate oil type and viscosity based on operating temperature.

Check Oil Level

Step-by-step instructions for checking and maintaining the engine oil level.

Change Oil and Filter

Procedure for changing engine oil and oil filter, including filter preparation.

Fuel System and Conversion

Oil Sentry System

Description of the oil level monitoring system designed to prevent engine start-up in low oil conditions.

Fuel Recommendations

Safety warnings and requirements for using LPG and NG fuels.

Fuel Conversion

Instructions for switching the engine between LPG and Natural Gas fuel types.

Component Service Procedures

LPG Regulator Service

Information on the LPG regulator, including deposit draining for Nikki regulators.

Lock-OffFilter Assembly

Details on the assembly that controls and filters liquid fuel flow.

Vaporizer Function

Explanation of the vaporizer's role in converting LPG to a gaseous state.

Spark Plug Maintenance

Instructions for cleaning, checking gap, and installing spark plugs.

Air Cleaner Servicing

Procedures for cleaning and replacing air cleaner precleaner and paper elements.

Breather Tube Check

Ensuring the breather tube is properly connected for correct engine operation.

Additional Maintenance and Storage

Oil Cooler Cleaning

Instructions for cleaning the engine oil cooler fins.

Air Cooling System

Importance of keeping cooling areas clean to prevent overheating.

Repairs and Service Parts

Recommendation to use authorized dealers for maintenance and parts.

Leakage Check and Testing

Procedure for checking fuel system connections and lines for leaks.

Engine Storage Procedure

Steps for preparing the engine for long-term storage, including oiling cylinder.

Troubleshooting Guide

Engine Specifications and Emissions

Engine Specifications

Table detailing model, bore, stroke, displacement, oil capacity, spark plug gap, and angle of operation.

Emission Control System

Information on the engine's emission control system and the consequences of tampering.