What is A 4-Cycle Weed Eater?

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If you ask those who lived back in the days when weekends meant spending time at home cutting grass and pulling weeds to clean up the yard, string trimmers were the best products to use compared to mowers.

Today, the same song has become even louder when weed eaters are the best products to rely on if you’re looking to clean your sidewalks, pathways, around trees, or the back of your home.

Now, with the rapid growth of technology, customers have discovered a noticeable upgrade in today’s string trimmers with relation to previous models. While the previous versions relied on two-cycle technology, today’s trimmers have advanced to four-cycle technology, which comes with more benefits than its predecessor.

How Do Both Engines Work?

Both the two-cycle and the four-cycle trimmers are very different in terms of operation. Other than the difference in the number of strokes, each of these engines comes with separate features that we’re going to highlight in this section.

The two-stroke engine operates in two cycles to complete a single power cycle. While operating, this engine relies on up-and-down movements to power up. The first stroke involves sucking in air into the system while the second stroke involves combustion.

When the piston moves to the top, both power and combustion happen, and when it reaches the bottom, air intake occurs, thus completing a single revolution.

The four-cycle engine is quite similar to the two-cycle engine except that it adds two more steps to the equation. The process of creating power in this type of engine involves power, exhaust, intake, and compression. This technique is also referred to as suck, squeeze, bang, and blow.

Four-stroke engines come with a crankcase and an oil distribution system that separates oil from gasoline for effective lubrication of the engine’s moving parts. Although the oil will need to be changed more often, these types of engines produce less exhaust and are quieter than two-cycle engines.

Comparison Between The 2-Stroke and 4-Stroke Engines

First, the two-cycle weed eater doesn’t have any valves. Instead, it contains ports that exhaust fumes. On the other hand, a four-cycle engine contains valves that dictate the opening, closing, intake, and exhaust operations.

A two-cycle weed eater is easier to operate than the four-cycle version because the engine doesn’t contain any valves that can make it heavier. These weed eaters are easier to operate although they lack enough power to tackle tough cutting tasks.

On the other hand, four-stroke trimmers are bulkier due to the four pistons, but the positive side is that they’re stronger and perfect for tackling bulky trimming assignments.

There is more wear and tear on the two-stroke string trimmer compared to the four-stroke version. This is because the two-cycle engine takes one power stroke to complete a revolution meaning more lubrication will be required.

On the other hand, the four-cycle version takes advantage of the available pistons to complete a revolution, thus resulting in less wear and tear.

Benefits of The 4-Cycle Weed Eaters


The two-cycle weed eater requires you to repeatedly pull a string to ignite the engine. On the other hand, a four-stroke engine has an improved state of technology that requires you to pull the string once to ignite the engine. Secondly, a four-stroke string trimmer uses standard gasoline, meaning you don’t need a separate can to mix the oil and gas together.

Lower emissions

As the world looks for ways of conserving the environment through restricting the use of gas-emitting engines, the four-stroke string trimmer is the perfect alternative that has already passed the CARB compliance test.

Unlike the two-stroke engine, the four-cycle engine used by most trimmers today has low gas emissions, which makes it environmentally friendly and the best to consider in most states across the globe.

Less noisy

Most commercial lawn care companies have continuously advanced the four-stroke string trimmer over the two-stroke version. This version is capable of handling more challenging cutting tasks and is relatively quiet compared to the two-stroke version.

With such a weed eater at the disposal, it becomes easier for you to trim your yard, pathways, or garden without waking your kids up or disturbing your neighbors.

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