Kohler ECV630, ECV680, ECV749, ECV730, ECV740 User Manual
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Owner's Manual
ECV630-ECV749
Vertical Crankshaft
Congratulations on your purchase of a Kohler Engine. Every part, every component, every system on a KOHLER engine is guided by our exclusive Performance Engineering philosophy:
•To operate on the leading edge of innovation
•To push the boundaries of cleaner, more efficient engines
•To manufacture the highest performing, most reliable engines on the market
You can rest assured that your Kohler Engine will provide maximum power and reliability in all operating conditions. Also, Kohler engines are backed by a worldwide network of over 10,000 distributors and dealers. For more information on Kohler Engines or to find a Kohler Service Center, visit KohlerEngines.com.
To keep your engine in top operating condition, follow the maintenance procedures in this manual.
Safety Precautions
To ensure safe operation 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.
CAUTION
Caution is used to indicate the presence of a hazard that will or can cause minor personal injury or property damage if the caution is ignored.
NOTE
Note is used to notify people of installation, operation, or maintenance information that is important but not hazard-related.
For Your Safety!
These precautions should be followed at all times. Failure to follow these precautions could result in injury to yourself and others.
California
Proposition 65 Warning
Engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
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WARNING
Explosive Fuel can cause fires and severe burns.
Do not fill the fuel tank while the engine is hot or running.
Explosive Fuel!
Gasoline is extremely flammable and its vapors can explode if ignited. Store gasoline only in approved containers, in well ventilated, unoccupied buildings, away from sparks or flames. Do not fill the fuel tank while the engine is hot or running, since spilled fuel could ignite if it comes in contact with hot parts
or sparks from ignition. Do not start the engine near spilled fuel. Never use gasoline as a cleaning agent.
Safety Precautions (Continued)
WARNING
Carbon Monoxide can cause severe nausea, fainting or death.
Avoid inhaling exhaust fumes, and never run the engine in a closed building or confined area.
Lethal Exhaust Gases!
Engine exhaust gases contain poisonous carbon monoxide. Carbon monoxide is odorless, colorless, and can cause death if inhaled. Avoid inhaling exhaust fumes, and never run the engine in a closed building or confined area.
WARNING
Hot Parts can cause severe burns.
Do not touch engine while operating or just after stopping.
Hot Parts!
Engine components can get extremely hot from operation. To prevent severe burns, do not touch these areas while the engine is running, or immediately after it is turned off. Never operate the engine with heat shields or guards removed.
WARNING
High Pressure Fluids can puncture skin and cause severe injury or death.
Do not work on fuel system without proper training or safety equipment.
High Pressure Fluid Puncture!
Fuel system is to be serviced only by properly trained personnel wearing protective safety equipment. Fluid puncture injuries are highly toxic and hazardous. If an injury occurs, seek immediate medical attention.
WARNING
Accidental Starts can cause severe injury or death.
Disconnect and ground spark plug leads before servicing.
Accidental Starts!
Disabling engine. Accidental starting can cause severe injury or death. Before working on the engine or equipment, disable the engine as follows: 1) Disconnect the spark plug lead(s). 2) Disconnect negative (-) battery cable from battery.
CAUTION
Electrical Shock can cause injury.
Do not touch wires while engine is running.
Electrical Shock!
Never touch electrical wires or components while the engine is running. They can be sources of electrical shock.
WARNING
Rotating Parts can cause severe injury.
Stay away while engine is in operation.
Rotating Parts!
Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never operate the engine with covers, shrouds, or guards removed.
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Air Cleaner
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Fixed |
Retaining |
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Oil Fill Cap/ |
Guard |
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Serial and |
Clips |
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Dipstick |
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Data Label |
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Oil
Cooler 
Spark
Plug
Electronic 
Control 
Unit 
(ECU) 
Fuses 
(Early 
Location) 
Fuel Filter |
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Fuel |
Oil |
Spark |
(Special EFI) |
Oil Drain |
Pump |
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Oil |
Module |
Drain |
Plug |
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Filter |
Plug |
Plug |
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Retaining
Clips
Figure 1. Control and Service Point Locations.
Engine Identification Numbers
When ordering parts, or in any communication involving an engine, always give the Model, Specification, and Serial Numbers of the engine.
The engine identification numbers appear on a decal (or decals) affixed to the engine shrouding. Include
letter suffixes, if there are any.
Emission Compliance Period
The Emission Compliance Period referred to on the Emission Control or Air Index label indicates the number of operating hours for which the engine has been shown to meet Federal and CARB emission requirements. The following table provides the Engine Compliance Period (in hours) associated with the category descriptor which may be found on the certification label.
Refer to certification label for engine displacement. Exhaust Emission Control System for models ECV630, ECV650, ECV680, ECV730, ECV740, ECV749 is EM, O2S, ECM, MPI for U.S. EPA, California, and Europe.
EPA |
Category A:1000 hours |
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CARB |
Extended:500 hours |
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Oil Recommendations
Using the proper type and weight of oil in the crankcase is extremely important. So is checking oil daily and changing oil regularly. Failure to use the correct oil, or using dirty oil, causes premature engine wear and failure.
Oil Type
Use high quality detergent oil of API (American Petroleum Institute) service class SJ or higher. Select the viscosity based on the air temperature at the time of operation as shown in the Recommended Viscosity Grades table.
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Kohler 10W-30 |
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10W-30 |
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SAE 30 |
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5W-30 |
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°F -20 |
0 |
20 |
32 |
40 |
50 |
60 |
80 |
100 |
°C -30 |
-20 |
-10 |
0 |
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10 |
20 |
30 |
40 |
Figure 2. Recommended Viscosity Grades Table.
Refer to Maintenance Instructions for detailed oil check, oil change, and oil filter change procedures.
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Fuel Recommendations
WARNING
Explosive Fuel can cause fires and severe burns.
Do not fill the fuel tank while the engine is hot or running.
Gasoline is extremely flammable and its vapors can explode if ignited. Store gasoline only in approved containers, in well ventilated, unoccupied buildings, away from sparks or flames. Do not fill the fuel tank while the engine is hot or running, since spilled fuel could ignite if it comes in contact with hot parts or sparks from ignition. Do not start the engine near spilled fuel. Never use gasoline as a cleaning agent.
General Recommendations
Purchase gasoline in small quantities and store in clean, approved containers. Acontainer with a
capacity of 2 gallons or less with a pouring spout is recommended. Such a container is easier to handle and helps eliminate spillage during refueling.
Do not use gasoline left over from the previous season, to minimize gum deposits in your fuel system and to ensure easy starting.
Do not add oil to the gasoline.
Do not overfill the fuel tank. Leave room for the fuel to expand.
Fuel Type
For best results use only clean, fresh, unleaded gasoline with a pump sticker octane rating of 87 (R+M)/2 or higher. In countries using the Research Octane Number (RON), it should be 90 octane minimum. Leaded gasoline is not recommended and must not be used on EFI engines or on other models where exhaust emissions are regulated.
Gasoline/Alcohol blends
Gasohol (up to 10% ethyl alcohol, 90% unleaded gasoline by volume) is approved as a fuel for Kohler engines. Other gasoline/alcohol blends including E20 and E85 are not to be used and not approved. Any failures resulting from use of these fuels will not be warranted.
Gasoline/Ether blends
Methyl Tertiary Butyl Ether (MTBE) and unleaded gasoline blends (up to a maximum of 15% MTBE by volume) are approved as a fuel for Kohler engines. Other gasoline/ether blends are not approved.
Operating Instructions
Also read the operating instructions of the equipment this engine powers.
Pre-Start Checklist
1. Check oil level. Add oil if low. Do not overfill.
NOTE: Engines are shipped without oil. Do not start engine with no or low oil. This will cause damage to the engine and will not be covered under warranty.
2.Check fuel level. Add fuel if low.
3.Check cooling air intake areas and external surfaces of engine. Make sure they are clean and unobstructed.
4.Check that the air cleaner components and all shrouds, equipment covers, and guards are in place and securely fastened.
5.Check that any clutches or transmissions are disengaged or placed in neutral. This is especially important on equipment with hydrostatic drive. The shift lever must be exactly in neutral to prevent resistance which could keep the engine from starting.
WARNING
Carbon Monoxide can cause
severe nausea, fainting or death.
Avoid inhaling exhaust fumes, and never run the engine in a closed building or confined area.
Engine exhaust gases contain poisonous carbon monoxide. Carbon monoxide is odorless, colorless, and can cause death if inhaled. Avoid inhaling exhaust fumes, and never run the engine in a closed building or confined area.
Starting
1.Place the throttle control midway between the SLOW and FAST positions.
2.Start the engine by activating the key switch. Release the switch as soon as the engine starts.
a.Turn the key switch to the ON position for one minute. Allow the fuel pump to cycle and prime the system. Turn the key switch
OFF.
b.Turn the key switch to the START position, crank and start engine.
c.If the engine fails to start, repeat steps a and b. If the engine does not start after two priming intervals, contact your Kohler Engine Service Center for further assistance.
NOTE: Do not crank the engine continuously for more than 10 seconds at a time. If the engine does not start, allow a 60 second cool down period between starting attempts. Failure to follow these guidelines can damage the starter motor.
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NOTE: Upon start-up, a metallic ticking may occur. This is caused by hydraulic lifter leakdown during storage. The noise will normally cease in the first minute. If noise continues, run the engine at mid-throttle for 20 minutes. If noise persists, take the engine to your Kohler Engine Service Center.
NOTE: If the starter cranks the engine but does not start the engine, the engine rotation must be allowed to come to a complete stop before attempting to restart the engine. If the starter is engaged while the flywheel is rotating, the starter pinion and flywheel ring gear may clash, resulting in damage to the starter.
If the starter does not turn the engine over, shut off starter immediately. Do not make further attempts to start the engine until the condition is corrected. Do not jump start using another battery (refer to Battery). See your Kohler Engine Service Center for service assistance.
Stopping
1.Remove the load by disengaging all PTO driven attachments.
2.Move the throttle to the slow or idle position; turn key OFF to stop engine.
Battery
A12 volt battery is used. Refer to the operating instructions of the equipment this engine powers for specific battery requirements.
If the battery charge is not sufficient to crank the engine, recharge the battery. Follow the battery manufacturer's instructions.
Operating
Angle of Operation
This engine will operate continuously at angles up to 25°. Check oil level to assure crankcase oil level is at the F mark on the dipstick.
Refer to the operating instructions of the equipment
this engine powers. Because of equipment design or application, there may be more stringent restrictions regarding the angle of operation.
NOTE: Do not operate this engine continuously at angles exceeding 25° in any direction.
Engine damage could result from insufficient lubrication.
WARNING
Hot Parts can cause severe burns.
Do not touch engine while operating or just after stopping.
Cooling
NOTE: If debris builds up on the fixed guard or other cooling areas, stop the engine immediately and clean. Operating the engine with blocked or dirty air intake and cooling areas can cause extensive damage due to overheating. Refer to
Clean Air Intake/Cooling Areas.
Engine Speed
NOTE: Do not tamper with the governor setting to increase the maximum engine speed. Overspeed is hazardous and will void the engine warranty. The maximum allowable high idle speed for these engines is 4200 RPM, no load.
Maintenance Instructions
Normal maintenance, replacement or repair of emission control devices and systems may be performed by any repair establishment or individual; however, warranty repairs must be performed by a Kohler authorized service center.
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