Honda makes a number of lawnmower engines that are used both on Honda branded mowers and mowers made by other manufacturers. Honda engines are very quiet and reliable. The choke system will depend on the manufacturer, with some adding an automatic choke and others using manual chokes, especially on lower cost lawnmowers.
Honda Publications These publications will give you additional information for maintaining and repairing your engine.You may order them from an authorized Honda engine servicing dealer. Shop Manual This manual covers complete maintenance and overhaul procedures. It is intended to be used by a skilled technician. Jeff's Little Engine Service demonstrates HOW TO ADJUST VALVES on a NOISY HONDA GC 160 5.0 HORSEPOWER Engine. The Honda GC160 motor is on a Pressure Washer that was found at a junkyard.
Type, Displacement and Shaft Dimensions
The Honda 160cc lawnmower engine is an air cooled, one-cylinder, overhead cam vertical shaft output engine with a compression ratio of 8.5:1. The cylinder in the engine is 7/8 inch in diameter and 3 5/32 inches long.
Power and Torque
The Honda 160cc lawnmower engine has a maximum speed of 3,300 rpm and can output 7.1 to 8.4 foot pounds of torque, depending on the exact configuration. Most 160cc Honda mower engines output around 5.5 horsepower.
Mounting Base and Shaft Keyway
Honda 160cc mower engines mount on an 8-inch base and use a 3/16-inch shaft keyway to pass the drive shaft through the mower deck to the blades.
Oil Capacity, Air Cleaner and Lubrication System
The 160cc Honda lawn mower engine holds .58 quarts of oil. The engine is lubricated using a splash type lubrication system and uses a dry air cleaner.
Timing Belt, Ignition System and Engine Brake
The Honda 160cc lawn mower engine uses an internal timing belt and a transistorized magneto ignition system. This engine features a flywheel brake to slow and stop the blades when the engine slows or stops.
Overhead Camshaft engines (OHC) are similar to OHV engines, but they also have their camshafts positioned in the cylinder head above the combustion chamber. This means they offer all the benefits of an OHV design and more.
The OHC layout reduces the number of valve train components, which allows them to be lighter and stronger. This makes the engine more compact and lightweight overall. Honda’s OHC design offers additional advantages:
By combining unique rocker arms and a single camshaft, the cam pulley is located on the side of the cylinder head. This allows overall engine height to be reduced in comparison to a conventional OHC engine.
The efficient Honda OHC mechanism uses a timing belt in oil configuration combined with governor and connecting rod slinger paddles. This unique DuaLube™ System efficiently and effectively delivers oil throughout the engine.