The KOHLER® Aegis® 31hp EFI (Electronic Fuel Injection) engine features closed loop technology. The Kohler EFI system has been engineered for consistent easy starts, lower fuel consumption, improved load pickup and optimal performance. The onboard fuel module, 4-wire oxygen sensor and unique location of the fuel injectors complete the Kohler's closed loop system.

Benefits of a Closed Loop EFI System

• Best in class fuel economy - Calibration is always being optimized for weather, engine condition, fuel supply and fuel type.
• Best in class repeatability - Always delivering the correct amount of fuel.
• Best in class durability - Always delivering the correct amount of fuel.

• 4 wire O2 sensor gives most robust sensing of any feedback system
• provides its own ground path through wire rather muffler
• has a heater for faster response and fuel adjustment accuracy
• optimizes fuel delivery over the life of the engine
• compensates for air cleaner changes and engine changes
• better fuel economy ($)
• Improved load response
  

The Kohler 31hp EFI Engine

Experience tremendous power, productivity, and fuel savings with this winning combination of engine and machine. With its automotive-style radiator and heavy-duty air filtration system, the Aegis delivers superior performance, custom made for the most demanding conditions.

The Kohler Aegis engine features a liquid-cooling system that ensures consistent flow and superior cooling to each cylinder. The results are less cold-start friction, faster warm-up time, lower oil temperatures, reduced engine wear, more power, and longer engine life. By integrating the overhead valve design of other successful Kohler engines, this engine offers optimal fuel efficiency, consistent running temperatures, and quiet operation. Easy-to-access service points, a solenoid shift starter, and a 3-year limited warranty* put the finishing touches on this impressive package.

Visit the Kohler Engine web site to see "How Electronic Fuel Injection (EFI) Works".

• Electronic fuel injection for maximum fuel efficiency
• Aluminum block with cast-iron cylinder liners
• Automotive-style radiator increases overall engine life and reliability
• Industrial grade air filtration system ensures maximum protection of interior engine components
• Dual air filters deliver maximum performance. The main filter traps dirt and debris while the inner filter prevents carburetor contamination during main filter servicing.
• Overhead valve design produces more power, improves fuel economy and cooling, and reduces oil consumption.
• Full pressure oil lubrication system with spin-on oil filter.
• Oil-pressurized valve lifters ensure that push rods remain in constant contact with rocker arms, eliminating valve adjustment; keeps valve train nearly maintenance free.
• Various user-friendly features: dual oil drains, easy-access oil fill, low-oil protection, in-line fuel filter
• Commercial grade solenoid shift starter means quick, reliable starts.
• Three-year limited engine warranty*

Engine Specifications	Kohler Aegis 31hp EFI (Model LH775)	Kohler Aegis 31hp EFI - Horsepower	Kohler Aegis 31hp EFI - Torque
Number of cylinders:	2 (V-Twin)
Bore x stroke [mm (in)]:	83 x 69 (3.3 x 2.7)
Displacement [cc (cu in)]:	748 (45.6)
Horsepower:	31
Torque Ft/lbs:	47.7
Lubricating system:	Pressure feed with spin-on oil filter
Engine oil capacity [Ltr (qt)]:	1.9 (2.0)
Cooling system:	Liquid cooled water pump, radiator & fan
Alternator:	12 Volt, 20 Amp
Starter:	12 Volt, 1.0kw

Heavy-duty air cleaner with rain cap Mechanical fuel pump Overhead valve, V-Twin design; Hydraulic valve lifters Automotive-style liquid cooling; Coolant thermostat; High-flow cooling fan Full-pressure lubrication with spin-on filter; Gerotor™ oil pump High-inertia flywheel *See Kohler engine warranty statement for details. Engine specifications based upon manufacturer supplied information. All specifications subject to change at anytime without notice or obligation.