From large industries to the average homeowner, gasoline powered small engines are widely used to complete major and minor tasks all over the world. Lawn mowers, air compressors and pumps are among the most the popular equipment that utilizes this machinery. They also power ATVs, motorcycles, scooters and certain light aircraft. For household mechanics, knowing the basics of a gasoline powered engine can help better maintain your equipment and help you trouble shoot potential issues that may arise.
What is a Gasoline Powered Small Engine?
Honda Mower
These systems are also known as an internal combustion engine. To run these engines, a spark created when the ignition is switched on creates an explosion as it comes into contact with the gasoline in the combustion chamber. Gasoline is a slow burning combustible liquid that becomes explosive when it mixes with air. This explosion is what gives the engine its power. There are a number of parts within these engines that make this entire process work efficiently.
Small Engine Components
1. Fuel System
The fuel system is made up of several other components. The fuel tank stores the gasoline until it enters the carburetor. A fuel pump removes the gasoline through a fuel line into the carburetor. The carburetor then mixes the required volume of air and gas in proper proportion to create the necessary energy. Inside the carburetor, a small filter collects small particles of dirt and sediment that may clog or dirty the fuel.
A primer is used to inject a small amount of extra gasoline into the carburetor to create a higher fuel intensity and stronger spark. This is usually used when weather conditions are cold or the small engine vehicle has been sitting for a long period of time.
2. The Ignition System
Combustion cannot take place if the spark needed to create the condition is not ignited. The ignition produces a high voltage spark that sets off the combustion needed to start the engine. A battery is used to activate this and a spark plug provides the catalyst in which current can flow.
3. The Cylinder Block
Combustion takes place in the cylinder block. Within the combustion chamber, the heat released by the chemical reaction creates a high-pressured gas environment. As this pressure force is pushed to the pistons of the engine, it causes the crankshaft to rotate.
4. The Cooling System
Because of the large amount of pressure and fuel reactions, gasoline small engines produce a large amount of heat. To keep them running efficiently, a cooling system must be in place. These engines are usually cooled using metal fins that push cool air across the system. Bearings are also used to bring down the amount of friction on the engine, thus reducing the amount of heat generated when it is running. Additionally, regular maintenance that includes oiling and cleaning filters will keep the engine heat down and the machine's efficiency up.
There is a lot more that can be learned about the inner workings of a gasoline-powered small engine. However, the basic mechanics of these machines can be broken down to some basic fundamentals in vehicle engine construction. What everyone should remember about small engines is this: Take the time to understand the basic workings of your lawn mower, golf cart, motorcycle, snow mobile or other small engine vehicle so that you can better maintain and prevent breakdowns in the future.
- Ben Anton, 2008
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Husqvarna 7021P 21-Inch 160cc Honda GCV160 Gas Powered 3-N-1 Push Lawn Mower With High Rear Wheels (CARB Compliant) Feature
- 21-inch, gas-powered push lawn mower with 160cc Honda GVC160 engine, ideal for smaller yards
- 3-in-1 cutting system--mulch, rear bag, and side discharge
- 12-inch rear wheels increase maneuverability over a variety of terrain
- Adjustable handle for ergonomic operation; folds for storage
- 7021P is compliant for the state of California
Husqvarna 7021P 21-Inch 160cc Honda GCV160 Gas Powered 3-N-1 Push Lawn Mower With High Rear Wheels (CARB Compliant) Overview
Exceptional Products For Exceptional Yards. Great yards demand equipment that's as dedicated and hardworking as you. Fortunately, the Husqvarna range of lawn and garden equipment offers everything from lawnmowers and ride-on mowers to trimmers and chainsaws to let you master your great outdoors. You and Husqvarna - together we will make your yard the envy of the neighborhood. The Husqvarna 7021P is an efficient mower featuring a compact design making it easy to manuever in tight spaces, and three cutting systems, collection, mulch and side discharge. The handle folds for easy storage and transportation and double ball-bearing wheels ensure smooth operation and durability. The 7021P also offers 4-point, 9 position cutting height adjustment for varying lawn conditions. 2 Year Parts & Labor WarrantyHusqvarna 7021P 21-Inch 160cc Honda GCV160 Gas Powered 3-N-1 Push Lawn Mower With High Rear Wheels (CARB Compliant) Specifications
Loaded with innovative features not usually found in its class, the Husqvarna 7021P Lawn Mower combines value with reliable performance. Powered by a premium Honda engine, this easy-to-use three-in-one mower makes it easy to create and maintain a manicured yard, and it is durable enough to last season after season.
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 Complete with mulching, rear-bag, and side-discharge capabilities. View larger. |
 12" rear wheels provide maneuverability in a variety of terrains. View larger. |
Ideal for medium-duty, seasonal, or occasional use, the 7021P provides a 21-inch cutting width, 1.5- to 3.5-inch cutting height, six cutting height increments, and four-point cutting height adjustment. Its 21-inch steel deck, easy-starting 6.9-gross-torque Honda engine--ensuring smooth, efficient operation--and the combined versatility of the three-in-one mulch, bag, and side discharge cutting system means you can meet all your lawn-care needs with just one machine.
Great Maneuverability
Uneven terrain, bumps, and tight areas around trees and bushes are no problem with the 7021P. 12-inch rear wheels and double ball bearings keep things smooth and stable, even when the ground isn't.
User-Friendly Features
Designed to be user friendly, the 7021P includes a dust-resistant rear bagger that makes grass collection easy, as well as a handle with adjustable height for more comfortable pushing. The handle can also be folded down for quick and easy storage and portability.
The 7021P is backed by a two-year warranty.
Husqvarna: Exceptional Products for Exceptional Yards
Great yards demand equipment that is as dedicated and hardworking as you are. Fortunately, Husqvarna's range of garden equipment offers everything from lawnmowers and snow blowers to trimmers and chainsaws that let you master your slice of the great outdoors. With Husqvarna, it's easy to make your yard the envy of the neighborhood.
What's in the Box
7021P Lawn Mower and manual.
 The 7021P Lawn Mower has a foldable handle for simplified transport and storage. |
Available In Stock. |
