Single-Cylinder OHV Engine - A Comprehensive Overview

The single-cylinder OHV (overhead valve) engine is a compact and efficient powerplant commonly found in small engines for lawnmowers, generators, and other applications. Its simple design and reliable performance make it an ideal choice for various industrial and consumer products.

### Engine Architecture:

The single-cylinder OHV engine features a single combustion chamber with a piston that reciprocates vertically within a cylinder block. The overhead valve arrangement places the intake and exhaust valves in the cylinder head, actuated by a camshaft located above the valves. This design provides improved volumetric efficiency compared to side-valve engines, resulting in higher power output and fuel efficiency.

### Combustion Cycle:

The engine operates on a four-stroke combustion cycle, consisting of intake, compression, power, and exhaust strokes. During the intake stroke, the intake valve opens, allowing the air-fuel mixture to enter the combustion chamber. The piston then moves upward, compressing the mixture in the compression stroke.

At the top of the compression stroke, the spark plug ignites the compressed mixture, initiating the power stroke. The expanding gases drive the piston downward, generating power. Finally, during the exhaust stroke, the exhaust valve opens, and the piston moves upward, expelling the combustion gases from the cylinder.

### Components:

**Cylinder Block:** The cylinder block houses the cylinder, where the piston reciprocates, and provides a rigid structure for the engine.

**Cylinder Head:** The cylinder head contains the valves, combustion chamber, and camshaft, forming the upper portion of the engine.

**Piston:** The piston moves within the cylinder and is responsible for compressing the air-fuel mixture and generating power.

**Connecting Rod:** The connecting rod connects the piston to the crankshaft, transmitting the reciprocating motion of the piston to rotational motion of the crankshaft.

**Camshaft:** The camshaft is located in the cylinder head and operates the valves through pushrods or rocker arms, controlling the timing of valve opening and closing.

### Advantages:

* **Simple Design:** The single-cylinder OHV engine has a relatively simple and compact design, making it easy to maintain and repair.
* **Reliability:** Overhead valve engines are known for their durability and longevity, providing extended service life.
* **Fuel Efficiency:** The overhead valve arrangement optimizes combustion efficiency, resulting in improved fuel consumption compared to side-valve engines.
* **Power Output:** The single-cylinder OHV engine provides a balance of power and torque, making it suitable for a wide range of applications.

### Applications:

Single-cylinder OHV engines are commonly used in:

* Lawn mowers
* Generators
* Pressure washers
* Concrete vibrators
* Small pumps
* Compressors
* Industrial equipment

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BRIGGS & STRATTON SINGLE CYLINDER OHV AIR-COOLED ENGINE SERVICE REPAIR MANUAL

APPLICABLE ENGINE MODEL:

MODEL 110000 HORIZONTAL SHAFT AIR-COOLED SERIES

MODEL 120000 HORIZONTAL SHAFT AIR-COOLED SERIES

MODEL 150000 HORIZONTAL SHAFT AIR-COOLED SERIES

MODEL 200000 HORIZONTAL SHAFT AIR-COOLED SERIES

MODEL 210000 HORIZONTAL SHAFT AIR-COOLED SERIES

MODEL 97700 & 99700 VERTICAL SHAFT AIR-COOLED SERIES

MODEL 110000 VERTICAL SHAFT AIR-COOLED SERIES

MODEL 120000 VERTICAL SHAFT AIR-COOLED SERIES

MODEL 210000 VERTICAL SHAFT AIR-COOLED SERIES

MODEL 280000 VERTICAL SHAFT AIR-COOLED SERIES

MODEL 310000 VERTICAL SHAFT AIR-COOLED SERIES

MODEL 330000 VERTICAL SHAFT AIR-COOLED SERIES

CONTENTS:
GENERAL INFORMATION
IGNITION SYSTEM
AIR CLEANER SYSTEM
CARBURETION SYSTEM
GOVERNOR CONTROLS
GOVERNOR SYSTEM
COMPRESSION SYSTEM
STARTERS SYSTEM
ALTERNATORS SYSTEM
LUBRICATION SYSTEM
ENGINE DISASSEMBLY
CYLINDERS & BEARINGS
CRANKSHAFTS & CAMSHAFTS
PISTONS–RINGS–RODS
ENGINE ASSEMBLY
GEAR REDUCTION SYSTEM
BATTERY SYSTEM
CHARGING SYSTEM
EXHAUST SYSTEM
FUEL FILTER & PUMP
IGNITION SYSTEM
OIL COOLER SYSTEM
REMOTE CONTROL SYSTEM
SPEED CONTROL ADJUSTMENT
TORQUE SPECIFICATION
TROUBLESHOOTING
MAINTENANCE SCHEDULE

This is a very comprehensive manual (DOWNLOAD in PDF format) for BRIGGS & STRATTON SINGLE CYLINDER OHV ENGINE, Features detailed exploded views. This is the same manual that technicians use to fix your engines. Manual covers detailed and complete step-by-step written procedures with pictures and diagrams, fully printable-selected pages or whole manual, illustrated. So, you will not be disappointed. This is the manual for Repairs, Maintenance & servicing.