Kohler AEGIS 17 20 23 HP Liquid-Cooled Vertical Crankshaft Factory Service Repair Manual

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• LV560

   (17 HP): Uses a liquid-cooled, V-twin design. Service manuals often cover this model alongside higher-horsepower variants.

• LV625

   (20 HP): As an LV-series engine, it is also liquid-cooled with a vertical crankshaft.

• LV675

   (23 HP): The highest-horsepower model in this specific grouping. A service manual for the 17, 20, and 23 HP versions (models LV560, LV625, and LV675) is available from sellers like Agcon Supply and on eBay. 

• Liquid-cooled design: These engines use a high-efficiency radiator and an integral water pump to maintain consistent engine temperatures, which helps reduce wear and tear and increases the engine’s lifespan.
• Overhead valve (OHV) design: The engines use an OHV V-twin layout, which provides high power output relative to their displacement.
• Durable construction: Featuring cast-iron cylinder liners, these engines are built for long-term commercial use.
• Low maintenance: Hydraulic valve lifters are self-adjusting, which eliminates the need for periodic valve adjustments.
• User-friendly maintenance: Routine service points like the oil fill/dipstick, radiator cap, and coolant overflow bottle are conveniently placed for easy access. 

• Overheating: The engine may overheat if there is a problem with the cooling system, such as a clogged radiator, low coolant level, or a faulty thermostat. Always check for blockages or leaks in the radiator and inspect the coolant level.
• Coolant leaks: Leaks can occur in the hoses, water pump, or around the cylinder head gasket. A hissing sound during a leak-down test can indicate a blown head gasket.
• Starting issues: Problems starting can be caused by a weak battery, a clogged fuel filter, or electrical issues with the electronic ignition or solenoid.
• Fuel system faults: For carbureted versions, a clogged carburetor can cause rough running. For EFI versions (found on some AEGIS models), issues may arise from a faulty fuel pump or sensor. 

• Ignition Coils: Replacement ignition coils compatible with the LV560, LV625, and LV675 engines can be found at parts suppliers.
• Water Pump: Replacement water pumps for the liquid-cooled AEGIS series are available from sellers of small engine parts.
• Carburetors: If the engine is carbureted, replacement carburetors are available, though some AEGIS models also use EFI.
• Piston and Rod Assemblies: Rebuild kits and assemblies are available for these engines from various vendors.