Are you tired of struggling with a lawn mower that constantly sputters and dies? Are you looking for a powerful and reliable machine that can handle your toughest mowing needs? If so, then you might want to consider an OHV engine lawn mower. But what exactly is an OHV engine and what makes it so special?
This article will delve into the world of OHV engine lawn mowers, explaining everything you need to know about these powerful machines. We’ll explore the differences between OHV and OHC engines, the benefits of using an OHV engine, and factors to consider when choosing an OHV engine lawn mower. By the end, you’ll have a comprehensive understanding of what makes OHV engines the top choice for many lawn care enthusiasts.
A Quick Overview of OHV Engines
OHV stands for “overhead valve,” which means the valves that control the flow of air and fuel into the combustion chamber are located above the cylinder head. This is in contrast to OHC (overhead cam) engines, where the camshaft that operates the valves is located above the cylinder head.
OHV engines are known for their durability, power, and efficiency. They are typically used in larger and heavier lawn mowers, including riding mowers, as well as other outdoor power equipment like generators and pressure washers.
Understanding OHV vs. OHC Engines
To truly appreciate the benefits of OHV engines, it’s helpful to understand how they differ from their OHC counterparts.
The Key Difference: Valve Placement
The most significant difference lies in the location of the valves. As mentioned earlier, OHV engines have valves above the cylinder head, while OHC engines have the camshaft above the cylinder head. This seemingly small difference has a considerable impact on engine performance and efficiency.
Advantages of OHV Engines
- Greater Power and Torque: The layout of OHV engines allows for larger valves, which means more air and fuel can enter the combustion chamber. This results in greater power and torque, making them ideal for tackling tough mowing tasks.
- Increased Durability: The robust design of OHV engines makes them more resistant to wear and tear. The valves are less prone to damage, and the overall engine design is less susceptible to vibration and stress.
- Improved Cooling: The positioning of the valves in OHV engines allows for better airflow around the cylinder head, promoting more efficient cooling. This reduces the risk of overheating, particularly during extended use.
- Lower Maintenance: Because of their simple design and durable construction, OHV engines generally require less maintenance than OHC engines.
Disadvantages of OHV Engines
While OHV engines offer numerous advantages, they also come with some drawbacks:
- Heavier and Bulkier: The design of OHV engines often makes them heavier and bulkier than OHC engines, which can make them harder to maneuver.
- Higher Cost: The added complexity of OHV engines often translates to a higher purchase price compared to OHC engines.
Choosing the Right OHV Engine Lawn Mower
Choosing the right OHV engine lawn mower depends on your individual needs and preferences. Here are some important factors to consider:
1. Engine Size and Power Output
The power output of an OHV engine is directly related to its size. Larger engines typically offer greater horsepower, which is ideal for handling thick grass and challenging terrain. Smaller engines are more suitable for smaller lawns and lighter mowing tasks.
2. Cutting Deck Size
The size of the cutting deck determines the width of the mowing path. Larger decks are faster and more efficient for large lawns, while smaller decks are better suited for smaller yards and areas with obstacles.
3. Features and Accessories
Consider the features and accessories that are important to you. Some key features include mulching capabilities, variable-speed controls, and height adjustment mechanisms.
4. Budget
OHV engine lawn mowers can range in price from a few hundred dollars to several thousand dollars. Set a budget before you begin shopping to ensure you stay within your financial limits.
Conclusion
OHV engine lawn mowers are known for their power, durability, and efficiency, making them a popular choice for many homeowners. When choosing an OHV engine lawn mower, consider your individual needs, such as lawn size, mowing frequency, and budget. By carefully assessing your requirements and researching available options, you can find the perfect OHV engine lawn mower to tackle your lawn care needs with ease.
Frequently Asked Questions
Here are some frequently asked questions about OHV engine lawn mowers:
What does OHV stand for?
OHV stands for “overhead valve”. In an OHV engine, the valves that control the intake and exhaust of the combustion chamber are located above the cylinder head. This design is more common in modern lawn mowers than older side valve (SV) engines.
The overhead valve design offers several advantages over side valve engines, including increased power, improved fuel efficiency, and reduced emissions.
What are the benefits of an OHV engine lawn mower?
OHV engine lawn mowers offer several benefits over their side valve counterparts. First, they are generally more powerful, allowing you to tackle thicker grass and more challenging terrain. Second, they are typically more fuel efficient, saving you money on gas in the long run. Third, they produce fewer emissions, making them a more environmentally friendly option.
Finally, OHV engines are typically more durable and reliable than side valve engines. This is because the valves are located in a more protected location, reducing the risk of damage.
Are OHV engine lawn mowers more expensive than SV lawn mowers?
Yes, OHV engine lawn mowers typically cost more than side valve lawn mowers. This is because the overhead valve design is more complex and requires higher quality materials. However, the benefits of an OHV engine, such as increased power, fuel efficiency, and durability, often outweigh the higher initial cost.
It’s important to consider the long-term value of an OHV engine lawn mower. You’ll likely save money on fuel and maintenance costs in the long run.
What are some of the best OHV engine lawn mowers on the market?
There are many excellent OHV engine lawn mowers on the market, and the best one for you will depend on your specific needs and budget. Some popular brands include Honda, Toro, and Husqvarna.
It’s important to consider factors such as engine size, cutting deck size, and features when choosing an OHV engine lawn mower.
How do I maintain an OHV engine lawn mower?
Maintaining an OHV engine lawn mower is relatively simple. You should regularly change the oil, air filter, and spark plug. You should also clean the cutting deck and ensure that the blades are sharp.
By following these simple maintenance tips, you can keep your OHV engine lawn mower running smoothly for years to come.
How do I know if my lawn mower has an OHV engine?
The easiest way to tell if your lawn mower has an OHV engine is to look for the “OHV” designation on the engine. You may also see the term “overhead valve” or “overhead camshaft” listed on the engine’s specifications.
If you’re unsure, you can consult your owner’s manual or contact the manufacturer.
What is the difference between an OHV and a side valve engine?
As mentioned, OHV stands for overhead valve, while SV stands for side valve. The main difference between these two types of engines lies in the placement of the valves that control the intake and exhaust of the combustion chamber.
In an OHV engine, the valves are located above the cylinder head. In an SV engine, the valves are located on the side of the cylinder head. This difference in design affects the power, efficiency, and durability of the engine.