Kohler CH640 Owner's Manual

Liquefi ed petroleum gas (lpg) or lpg/natural gas (ng) fueled horizontal crankshaft

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Owner's manual (12 pages)

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Summary of Contents for Kohler CH640

Page 1 WNER ANUAL WNER ANUAL CH640, CH730, CH740 ORIZONTAL RANKSHAFT Liqueﬁ ed Petroleum Gas (LPG) or LPG/Natural Gas (NG) Fueled...
Page 2: Safety Precautions
Safety Precautions To ensure safe operations please read the following statements and understand their meaning. Also refer to your equipment owner's manual for other important safety information. This manual contains safety precautions which are explained below. Please read carefully. WARNING Warning is used to indicate the presence of a hazard that can cause severe personal injury, death, or substantial property damage if the warning is ignored.
Page 3 • Dependable, maintenance free electronic ignition ensures fast, easy starts time aft er time. • Kohler engines are easy to service. All routine service areas (like the dipstick and oil ﬁ ll, air cleaner, spark plugs, and carburetor) are easily and quickly accessible.
Page 4: Oil Recommendations
10W-30 SAE 30 Fuel Recommendations 5W-20, 5W-30 CH640 and CH740 engines are certiﬁ ed to operate on LPG or NG. °F -20 °C -30 CH730 engines are certiﬁ ed to operate on LPG. TEMPERATURE RANGE EXPECTED BEFORE NEXT OIL CHANGE *Synthetic oils will provide bett er starting in extreme cold below -23°C (-10°F).
Page 5: Fuel Conversion
LPG Engines LPG Operation LPG from an appropriate LPG fuel tank (supplied Installation of jet in regulator ﬁ tt ing is required for separately) is required to operate this engine. LPG operation. Switching from NG to LPG WARNING: Pressurized LPG! NOTE: When switching from NG to LPG fuel, the Fuel tanks are ﬁ...
Page 6: Model Designation
Exhaust Emission Control System for gaseous fuel Starting models CH640, CH730, and CH740, is EM for U.S. 1. Place the thrott le control in the idle position. EPA, California, and Europe. Place the choke control (if equipped) into the on position.
Page 7 Because of equipment design or jump start using another batt ery (refer to Batt ery). See application, there may be more stringent restrictions your Kohler Engine Service Dealer for trouble analysis. regarding the angle of operation. NOTE: Upon start-up, a metallic ticking may occur.
Page 8: Maintenance Instructions
• Have vaporizer disassembled, cleaned, and serviced Hours Perform these maintenance procedures more frequently under extremely dusty, dirty conditions. Have a Kohler Engine Service Dealer perform this service. Must be performed by an Authorized Kohler Engine Dealer or qualiﬁ ed LPG personnel only.
Page 9 Check Oil Level Change Oil and Oil Filter The importance of checking and maintaining the proper oil level in the crankcase cannot be Change Oil overemphasized. Check oil BEFORE EACH USE as Change oil aft er every 100 hours of operation. Reﬁ ll follows: with service class SG, SH, SJ or higher oil as speciﬁ...
Page 10 Air Cleaner Cover Replace the oil ﬁ lter at least every other oil change (every 200 hours of operation). Always use a genuine Kohler oil ﬁ lter. Use chart below to determine part number to order. Oil Filter Part No.
Page 11: Ignition System
Ignition System element. CH640 and CH730 engines are equipped with an electronic CDI system. CH740 engines are equipped 1. Loosen the cover retaining knob and remove the with an electronic DSAI system. Other than air cleaner cover.
Page 12: Battery Charging
Spark Plug engine under all operating conditions and cannot be adjusted, except for low idle speed. Carburetor servicing is to be performed by an authorized Kohler Engine Service Dealer only. See Figure 11. Ground Electrode...
Page 13 This opens, closes, and ﬁ lters the liquid fuel ﬂ ow from the supply tank before reaching the vaporizer. Servicing, if required, is to be performed by an authorized Kohler Engine Service Dealer or qualiﬁ ed LPG personnel only. See Figures 13 and 14. Vaporizer The vaporizer changes the Liqueﬁ...
Page 14: Troubleshooting
Have service performed If aft er checking the items listed above, the engine is by an authorized Kohler Engine Service Dealer or hard to start, runs roughly, or stalls at low idle speed, qualiﬁ ed LPG personnel only.
Page 15: Parts Ordering
83 (3.27) 67 (2.64) 725 (44) 9.0:1 43 (94) @ 2400 RPM *approximate, determined by oil ﬁ lter and oil cooler used. Exhaust Emission Control System for gaseous fuel models CH640, CH730, and CH740, is EM for U.S. EPA, California, and Europe.
Page 16 LIMITED 2 YEAR COMMAND ENGINE WARRANTY Kohler Co. warrants to the original consumer that each new Command engine sold by Kohler Co. will be free from manufacturing defects in materials or workmanship in normal service for a period of two (2) years from date of purchase, provided it is operated and maintained in accordance with Kohler Co.’s instructions and manuals.
Page 17 These warranty periods will begin on the date the engine is purchased by the initial purchaser. If any emission related part on the engine is defective, the part will be replaced by Kohler Co. at no cost to the owner. Kohler Co. is liable for damages to other engine components caused by the failure of a warranted part still under warranty.
Page 18 MAINTENANCE AND REPAIR REQUIREMENTS The owner is responsible for the proper use and maintenance of the engine. Kohler Co. recommends that all receipts and records covering the performance of regular maintenance be retained in case questions arise. If the engine is resold during the warranty period, the maintenance records should be transferred to each subsequent owner.
Page 20 FORM NO.: 24 590 18 Rev. B ISSUED: 10/10 REVISED: 4/11 FOR SALES AND SERVICE INFORMATION IN U.S. AND CANADA, CALL 1-800-544-2444 KohlerEngines.com ENGINE DIVISION, KOHLER CO., KOHLER, WISCONSIN 53044 © 2011 by Kohler Co. All rights reserved.

This manual is also suitable for:

Ch730 Ch740