OWNER'S MANUAL KOHLER AEGIS® LV625, LV675, LV680 LIQUID-COOLED VERTICAL CRANKSHAFT
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.
Safety Precautions (Cont.) WARNING WARNING WARNING Accidental Starts can cause severe injury or death. Carbon Monoxide can cause severe nausea, fainting or death. Explosive Gas can cause fires and severe acid burns. Disconnect and ground spark plug leads before servicing. Do not operate engine in closed or confined area. Charge battery only in a well ventilated area. Keep sources of ignition away. Accidental Starts! Disabling engine. Accidental starting can cause severe injury or death.
Engine Identification Label Upper Blower Housing and Air Intake Screen Assembly Retaining Strap Oil Fill/ Dipstick Fuel Pump Electric Starter Spark Plug Oil Filter Valve Cover with Integral Breather Spark Plug Figure 1. Typical Kohler Aegis® Vertical Shaft Engine. 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.
Do not use gasoline left over from the previous season, to minimize gum deposits in your fuel system and to ensure easy starting. Record your engine identification numbers on the identification label (Figure 4) for future reference. 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 the pump sticker octane rating of 87 or higher.
Operating Instructions Also read the operating instructions of the equipment this engine powers. Pre-Start Checklist • Check oil level. Add oil if low. Do not overfill. • Check coolant level. Add coolant if low. • Check fuel level. Add fuel if low. • Check radiator, cooling air intake areas and external surfaces of engine. Make sure they are clean and unobstructed. • Check that the air cleaner components and all shrouds, equipment covers, and guards are in place and securely fastened.
Battery High Temperature Sensor A 12 volt battery is normally used. Refer to the operating instructions of the equipment this engine powers for specific battery requirements. 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 engine or activate a warning signal, depending on the application. If the battery charge is not sufficient to crank the engine, recharge the battery (see page 15).
Maintenance Instructions Maintenance, repair, or replacement of the emission control devices and systems, which are being done at the customers expense, may be performed by any non-road engine repair establishment or individual. Warranty repairs must be performed by an authorized Kohler service outlet. WARNING: Accidental Starts! Disabling engine. Accidental starting can cause severe injury or death.
2. Remove one of the oil drain plugs and the oil fill cap/dipstick. Be sure to allow ample time for complete drainage. "Full" Mark Operating Range 3. Before removing the oil filter, clean the area around the oil filter to keep dirt and debris out of the engine. Remove the old filter and wipe off the filter adapter with a clean cloth. 4. Reinstall the drain plug. Make sure it is tightened to 13.6 N·m (10 ft. lb.) torque. Figure 6. Oil Level Dipstick. 5.
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. Figure 8. Unhooking Retaining Straps.
Draining Cooling System 1. Stop the engine and allow it to cool sufficiently. 2. Unhook the four retaining straps, and remove the upper blower housing and screen assembly. See Figures 8 and 9. 3. Check if the radiator is cool to the touch. Slowly loosen the radiator cap to the first stop and allow any pressure to bleed off. Then fully loosen and remove it. Loosen Screws Figure 13. Loosening Screws. 6. Remove the reservoir cap.
7. Reinstall the reservoir, engaging the two lower molded protrusions in the mounting holes of the support bracket. Engage the top bracket around the upper protrusion. Hold it in this position and torque the screws to 7.3 N·m (65 in. lb.). 3. Fill the radiator with the coolant mixture. Allow coolant to drain into the lower areas. Fill the overflow reservoir to a level between the ‘‘Max. Level’’ and ‘‘Min. Level’’ marks. See Figure 10. Reinstall the radiator and reservoir caps. 8.
Service Precleaner Wash and reoil the precleaner every 25 hours of operation (more often under extremely dusty or dirty conditions). 1. Unhook the four retaining straps and remove the upper blower housing and screen assembly. See Figures 8 and 9. 2. Remove the foam precleaner from the paper element. See Figure 17. Figure 19. Unsnapping Screen Assembly. Figure 17. Removing Precleaner from Paper Element. 3. Wash the precleaner in warm water with detergent.
3. Unhook the element retaining strap and remove the paper element from the air cleaner base. See Figure 21. Clean Air Intake/Cooling Areas To ensure proper air circulation, make sure the air intake screen, radiator, cooling fins, and other external surfaces of the engine are kept clean at all times. Every 100 hours of operation (more often under extremely dusty, dirty conditions), remove the upper blower housing assembly.
Ignition System This engine is equipped with an electronic CD ignition system. Other than periodically checking/replacing the spark plugs, no maintenance or adjustments are necessary or possible with this system. Wire Gauge Spark Plug In the event starting problems should occur which are not corrected by replacing the spark plugs, see your Kohler Engine Service Dealer for trouble analysis.
Carburetor Troubleshooting and Adjustments In compliance with the government emission standards, the carburetor is calibrated to deliver the correct fuel-to-air mixture to the engine under all operating conditions. The carburetor cannot be adjusted, except for low idle speed (RPM). Carburetor servicing is to be performed by an authorized Kohler Engine Service Dealer only. See Figure 24. Idle Speed Adjusting Screw Fuel Line Inlet • Make sure fuel is reaching the carburetor.
Troubleshooting When troubles occur, be sure to check the simple causes which, at first, may seem too obvious to be considered. For example, a starting problem could be caused by an empty fuel tank. Some common causes of engine troubles are listed in the following table. Do not attempt to service or replace major engine components, or any items that require special timing or adjustment procedures. Have your Kohler Engine Service Dealer do this work.
Specifications Model: ........................................................................................... LV625 ......................... LV675/LV680 Bore: ..................................................... in. (mm) ......................... 3.03 (77) ..................... 3.15 (80) Stroke: ................................................... in. (mm) ......................... 2.64 (67) ..................... 2.64 (67) Displacement: ........................................ in3 (cm3) ...............
KOHLER CO. FEDERAL AND CALIFORNIA EMISSION CONTROL SYSTEMS LIMITED WARRANTY SMALL OFF-ROAD ENGINES The U.S. Environmental Protection Agency (EPA), the California Air Resources Board (CARB), and Kohler Co. are pleased to explain the Federal and California Emission Control Systems Warranty on your small off-road equipment engine. For California, engines produced in 1995 and later must be designed, built and equipped to meet the state’s stringent anti-smog standards.
LIMITATIONS This Emission Control Systems Warranty shall not cover any of the following: (a) repair or replacement required because of misuse or neglect, improper maintenance, repairs improperly performed or replacements not conforming to Kohler Co. specifications that adversely affect performance and/or durability and alterations or modifications not recommended or approved in writing by Kohler Co.
