Directory Brands Kohler Command CH620

Manual Kohler - Command CH620, Command CH745, Command CH26, Command CH740, Command CH22, Command CH20, Command CH750, Command CH23

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CH18-CH26, CH620-CH750












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Summary of Contents

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    2 Explosive Fuel can cause fires andsevere burns. Do not fill the fuel tank while theengine is hot or running. WARNING Explosive Fuel! Gasoline is extremely flammable and itsvapors can explode if ignited. Storegasoline only in approved containers,in well
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    3 Safety Precautions (Cont.) Accidental Starts can cause severeinjury or death. Disconnect and ground spark plugleads before servicing. WARNING Carbon Monoxide can cause severenausea, fainting or death. Avoid inhaling exhaust fumes, andnever run the engine
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    4 Figure 1. Typical Command Horizontal Shaft Carbureted Engine. Figure 2. Typical Command Horizontal Shaft EFI Engine. Air Cleaner Oil Fill Rectifier-Regulator Throttle Body Intake Manifold Ignition Coil Fuel Injectors Ignition Coil Oil Filter Oil Cooler
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    5 Refer to Maintenance Instructions beginning onpage 8 for detailed oil check, oil change, and oil filterchange procedures. Fuel Recommendations WARNING: Explosive Fuel! Gasoline is extremely flammable and its vapors can explodeif ignited. Store gasoline
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    6 Engine Identification Numbers When ordering parts, or in any communicationinvolving an engine, always give the Model,Specification, and Serial Numbers of the engine. The engine identification numbers appear on a decalaffixed to the engine shrouding. Include
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    7 • Check that any clutches or transmissions are disengaged or placed in neutral. This is especiallyimportant on equipment with hydrostatic drive. Theshift lever must be exactly in neutral to preventresistance which could keep the engine fromstarting. WARNING:
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    8 Cooling NOTE: If debris builds up on the grass screen or other cooling air intake areas, stop the engineimmediately and clean. Operating the enginewith blocked or dirty air intake and coolingareas can cause extensive damage due tooverheating. WARNING:
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    9 • Replace fuel filter 1 (EFI engines). Daily or Before Starting Engine Maintenance Required Frequency • Fill fuel tank.• Check oil level.• Check air cleaner for dirty 1 , loose, or damaged parts. • Check air intake and cooling areas, clean as necessary
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    10 Oil Filter Oil Drain Plug Oil Cooler Replace the oil filter as follows: 1. Drain the oil from the engine crankcase. 2. Allow the oil filter to drain. 3. Before removing the oil filter, clean the area around the oil filter to keep dirt and debris out ofthe
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    11 Figure 11. Air Cleaner System Components. Check the air cleaner daily or before starting theengine. Check for a buildup of dirt and debris aroundthe air cleaner system. Keep this area clean. Also checkfor loose or damaged components. Replace all bent
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    12 MainElement InnerElement DustEjectorValve 2. Pull the air cleaner element out of the housing. See Figure 12. Service Paper Element Every 100 hours of operation (more often underextremely dusty or dirty conditions) replace the paperelement. 1. Loosen the
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    13 Figure 14. Servicing Spark Plug. 4. Reinstall the spark plug into the cylinder head. Torque the spark plug to 24.4-29.8 N·m(18-22 ft. lb.). Battery Charging WARNING: Explosive Gas! Batteries produce explosive hydrogen gas while being charged.To prevent
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    14 Carburetor Troubleshooting andAdjustments Engines in this series use either a one- or two-barrelcarburetor depending on model, and may also beequipped with a Governed Idle System. Specificadjustment procedures are provided based on themodel and carburetor
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    15 The system requires an additional procedure forsetting the idle speed. If speed adjustments arerequired proceed as follows. 1. Make any necessary speed or control adjustments following the appropriate instructions covered inthis section. 2. Move the throttle
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    16 Figure 20. Keihin Two-Barrel Carburetor. Low Idle Speed (RPM) Adjustment 1. Low Idle Speed (RPM) Setting: Place the throttle control into the idle or slow position. Set the lowidle speed to 1200 RPM* (± 75 RPM) by turningthe low idle speed adjusting screw
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    17 Troubleshooting If the MIL comes on, or the engine becomes hard tostart, runs roughly, or stalls at low idle speed, initialchecks should be made in the following areas: • Make sure the fuel tank is filled with clean, fresh gasoline, and shut-off valve
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    18 Specifications Model: ..................................................................... CH18/CH620 ............... CH20/CH640 ............... CH23/CH680Bore: ............................................ mm (in.) ........... 77 (3.03) .......................
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    19 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 manufacturingdefects in materials or workmanship in normal service for a period of two (2) years from
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    (c) For warranty repairs, the engine must be presented to a Kohler Co. service center as soon as a problem exists. Call 1-800-544-2444 or accessour website at:, for the names of the nearest service centers. The warranty repairs should

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