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Briggs & Stratton 273521 Three Cylinder OHV Engine: A Comprehensive Overview
Introduction
The Briggs & Stratton 273521 Three Cylinder OHV engine is a robust and reliable power source designed for a wide range of applications, including lawn and garden equipment, industrial machinery, and more. This advanced engine offers exceptional performance, durability, and fuel efficiency, making it an ideal choice for demanding environments.
Engine Design
The 273521 engine features a three-cylinder, overhead valve (OHV) configuration that optimizes airflow and combustion efficiency. This design maximizes power output while reducing fuel consumption and emissions. The OHV arrangement positions the valves above the combustion chamber, allowing for larger valves and improved gas flow, resulting in higher power and torque.
Cylinder Construction
The cylinders are precision-machined from cast iron, providing excellent durability and heat dissipation. The cast iron construction ensures the cylinders can withstand the rigors of heavy-duty use and maintain their shape over extended periods. The cylinders are honed to a precise tolerance, ensuring optimal piston movement for minimal friction and wear.
Crankshaft
The crankshaft is a critical component that converts the reciprocating motion of the pistons into rotational motion. The 273521 engine utilizes a forged steel crankshaft that is heat-treated for superior strength and durability. The crankshaft features precision-ground journals and bearing surfaces, ensuring smooth operation and long service life.
Connecting Rods
The connecting rods connect the pistons to the crankshaft. The 273521 engine uses forged steel connecting rods that are designed to withstand the high forces generated by the combustion process. The rods are precisely balanced to minimize vibration and ensure smooth engine operation.
Piston Rings
The piston rings provide a seal between the piston and the cylinder wall, preventing the loss of compression and combustion gases. The 273521 engine uses multiple piston rings, including compression rings and oil control rings. The compression rings are made of a high-strength alloy that maintains a tight seal, while the oil control rings regulate oil consumption and prevent excessive oil accumulation in the combustion chamber.
Valvetrain
The valvetrain is responsible for opening and closing the intake and exhaust valves at the appropriate times. The 273521 engine uses a pushrod-operated valvetrain with hydraulic lifters. The hydraulic lifters automatically adjust the clearance between the valves and camshaft, ensuring optimal valve timing and performance.
Combustion System
The combustion system plays a crucial role in the efficiency and power output of the engine. The 273521 engine utilizes a high-compression ratio and a spark ignition system to optimize combustion. The spark plug is strategically located to ignite the air-fuel mixture at the optimal time, ensuring complete combustion and maximum power output.
Lubrication System
A reliable lubrication system is essential for the longevity of the engine. The 273521 engine features a pressurized lubrication system that delivers oil to all critical components. The oil pump draws oil from the oil pan and forces it through a filter to remove contaminants. The filtered oil is then distributed to the crankshaft, camshaft, bearings, and other components, minimizing friction and wear.
Cooling System
The cooling system maintains the engine's operating temperature within an acceptable range. The 273521 engine utilizes an air-cooling system that dissipates heat through fins on the cylinder head and crankcase. The cooling system ensures that the engine operates efficiently and prevents overheating, even under demanding conditions.
Fuel System
The fuel system delivers a precise amount of fuel to the combustion chamber. The 273521 engine uses a carburetor that mixes air and fuel in a controlled ratio. The carburetor is equipped with a fuel filter to remove contaminants and ensure a consistent supply of clean fuel to the engine.
Electrical System
The electrical system provides power for starting, ignition, and other essential functions. The 273521 engine uses a flywheel magneto that generates electricity for the spark plug. The electrical system also includes a charging system that replenishes the battery and provides power to accessories such as lights and gauges.
Conclusion
The Briggs & Stratton 273521 Three Cylinder OHV engine is an exceptional power source engineered for demanding applications. Its advanced design, durable construction, and optimized combustion system deliver exceptional performance, fuel efficiency, and reliability. Whether used in lawn and garden equipment, industrial machinery, or other applications, the 273521 engine provides the power and durability to meet the challenges of any task.
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Briggs Stratton 273521 Three Cylinder OHV Service Repair Workshop Manual Download PDF
Complete Factory Service Repair Workshop Manual. No Extra fees, No Expiry dates.
Service Repair Workshop Manual, available for instant download to your computer tablet or smart phone.
This Professional Manual covers all repairs, servicing and troubleshooting procedures. It is very detailed and contains hundreds of pages with detailed photos & diagrams.
This is the same type of manual used by professional Mechanics and Technicians containing step by step instructions & highly detailed exploded diagrams & pictures to show you how to complete every job correctly.
Q. Can I print out a page?
A. Yes you can print out a single page or the entire manual, its your choice.
Q. Can I use this Manual on more than one computer?
A. Yes, this Manual can be used on as many computers as required.
Q. Is this a trial or a limited version?
A. No, this is the FULL Manual without any limitations or trial periods and can be used for life.
Q, Will this Manual expire in 12 months or will I have to pay a renewal fee?
A. NO, Absolutely not! You can continue to use this Manual for life without the need to renew or pay any extra.
Q. Will this PDF Manual work on Windows & MAC computers?
A. Yes, it is fully compatible with all Windows & All MAC Computers.
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