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10

Cooling System Maintenance and Service

Important service notes:

• Do not operate the engine without coolant in

system.

• Do not remove the radiator cap when hot. Engine

coolant is hot and under pressure and can cause
severe burns.

• To prevent engine overheating and damage, use

the recommended anti-freeze mixture in the
cooling system.

• To prevent engine damage, do not pour cold water

into a hot engine.

• To prevent engine damage, do not use anti-freeze

with stop-leak additive(s) or put other additives in
the cooling systems.

• Cooling system capacity is approximately 1.4 L

(1.47 qt.).

Maintenance
This engine is liquid-cooled, circulating a mixture of
ethylene glycol and water for dependable operation. A
pump is used to circulate the coolant through the
system and radiator. A thermostat contained in the
system assures automatic temperature control and
rapid warm-up. Correct coolant level and cleaning any
debris accumulation from the inlet screen and radiator
surfaces are critical to insuring long life, proper system
performance, and preventing overheating. Check the
coolant level in the overflow reservoir, and clean away
any debris accumulation daily or before each use. At
the same time, inspect the hoses and all connections
for signs of leakage.

Servicing
Engine coolant should be changed every 2 years or
every 1000 hours, whichever comes first
. When
changing the engine coolant, the system should also
be flushed to remove any contaminants left behind
during draining. Following are recommended
procedures for checking, draining, flushing, and filling
the cooling system.

Checking Coolant Level
The coolant level should be checked at the overflow
reservoir, located under the upper blower housing
assembly.

1. Unhook the retaining straps and remove the upper

blower housing and screen assembly. See Figures
8 and 9.

Figure 8. Unhooking Retaining Straps.

Figure 9. Removing Upper Blower Housing and
Screen Assembly.

2. Check the coolant level within the overflow

reservoir. Coolant level should be between the
‘‘Max. Level’’ and ‘‘Min. Level’’ marks on the
reservoir. See Figure 10. Do not operate the
engine with the coolant level below the ‘‘Min.
Level’’ mark.

Add coolant to the overflow reservoir as required.
Use equal parts of ethylene glycol and water only
(distilled or deionized water is recommended).

Figure 10. Coolant Levels on Reservoir.

Summary of Contents for Aegis LV625

Page 1: ...KOHLER AEGIS LV625 LV675 LV680 LIQUID COOLED VERTICAL CRANKSHAFT OWNER S MANUAL...

Page 2: ...njury to yourself and others 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 informat...

Page 3: ...d ground spark plug leads before servicing WARNING Electrical Shock Never touch electrical wires or components while the engine is running They can be sources of electrical shock CAUTION Electrical Sh...

Page 4: ...er to handle and helps eliminate spillage during refueling Oil Recommendations Using the proper type and weight of oil in the crankcase is extremely important So is checking oil daily and changing oil...

Page 5: ...eak additive s or put any other additives in the cooling system Engine Identification Numbers When ordering parts or in any communication involving an engine always give the Model Specification and Se...

Page 6: ...he throttle control midway between the slow and fast positions Place the choke control into the on position 2 Start the engine by activating the key switch Release the switch as soon as the engine sta...

Page 7: ...Area page 14 High Temperature Sensor Some engines are equipped with a high temperature sensor mounted in the cooling system If the safe operating temperature is exceeded it will either shut off the en...

Page 8: ...ore Starting Engine Every 100 Hours Annually or Every 200 Hours Change oil and oil filter more frequently under severe conditions Check spark plug condition and gap Replace fuel filter Have solenoid s...

Page 9: ...hanging the oil Change the oil and oil filter as follows see Figure 7 1 To keep dirt debris etc out of the engine clean the area around the oil fill cap dipstick before removing it 2 Remove one of the...

Page 10: ...the coolant level in the overflow reservoir and clean away any debris accumulation daily or before each use At the same time inspect the hoses and all connections for signs of leakage Servicing Engin...

Page 11: ...f all the old coolant properly according to local regulations Figure 14 Tipping Bracket Away after Removing Reservoir Cap Loosen Screws Figure 15 Removing Reservoir Figure 11 Removing Radiator Cap 4 L...

Page 12: ...ant Recommendations Section refer to the anti freeze manufacturers instructions on the container but do not exceed 70 anti freeze 3 Fill the radiator with the coolant mixture Allow coolant to drain in...

Page 13: ...ulation If required the screen assembly may also be separated from the upper blower housing by unsnapping it from the underside See Figures 18 19 and 20 Check all parts for wear cracks or damage Repla...

Page 14: ...e with a blocked air intake screen dirty or plugged radiator cooling fins and or cooling shrouds removed will cause engine damage due to overheating 3 Unhook the element retaining strap and remove the...

Page 15: ...ain in the spark plug and enter the engine causing extensive wear and damage 3 Check the gap using a wire feeler gauge Adjust the gap to 0 76 mm 0 030 in by carefully bending the ground electrode See...

Page 16: ...n at half throttle for 5 to 10 minutes to warm up The engine must be warm before making final settings Low idle speed RPM setting 1 Place the throttle control into the idle or slow position Set the lo...

Page 17: ...uel system must be completely emptied or the gasoline must be treated with a stabilizer to prevent deterioration If you choose to use a stabilizer follow the manufacturers recommendations and add the...

Page 18: ...l disclose to have been defective EXCLUSIONS Mufflers on engines used commercially non residential are warranted for one 1 year from date of purchase except catalytic mufflers which are warranted for...

Page 19: ...or 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 access our web site at www kohlerengines com for the names of the near...

Page 20: ...nd 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 w...

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