Best 4 Cycle Weed Eater Reviews — Top 5 Models in 2017

Want to have a well-trimmed lawn around your home? Well, a best 4 cycle weed eater might just be what you are looking for. This machine presents a higher technological advancement over the 2 cycle models. It packs enough power to get the job done quicker and in a more professional manner. But how do you know the models that perform well in the world of weed eaters? Or which ones provide a more cost-effective solution when it comes to eliminating weeds? Well, don’t scratch your head trying to figure out the machines that top the list on the market.

I have provided you with everything you need to know regarding the weed eaters powered by a 4-cycle engine. Outlined in a numbered list form, I will briefly touch on each machine and give the features that make it key to achieving a beautiful lawn. Even the best machines have their own advantages and disadvantages. It is for this reason that I will go further to point out the pros and cons you experience from using them. And in case you want to have some basic knowledge when it comes to choosing the top machine, then you are in the right place. I will provide you with a comprehensive purchasing guide to help you make a wise selection. Read more and discover what I have in store for you.

Benefits of 4 Cycle Weed Eaters

There are lots of questions as to why most people tend to prefer the 4-cycle machines. I will try to give a clear answer by outlining the benefits that you derive from using these machines. Below are three of the most notable advantages of using 4-cycle weed trimmers:

  • Lower emissions: While trimming your lawn you need to take some consideration regarding its effect on the environment. Carbon-footprint is constantly on the rise and has contributed largely to global warming. The 4-cycle machines are equipped with an advanced technology designed to keep carbon emission at a minimum. This renders them a much healthier choice. The fact that they are CARB compliant also makes them legal for use in all states. Therefore regardless of where you live, be assured that these machines are certified for your needs.
  • Quieter: Some neighbors can be quite quarrelsome. However, they have a right to be so in case your weed eater machine proves to be a nuisance. You can avoid all these by using a 4-cycle machine. They are generate lower noise level that is comfortable both to the user and those around. Some of these machines can even be used during odd hours without waking up the neighbors.
  • Easy starting: Starting a 2-cycle weed eater can be a gruesome task. But with the 4-cycle machines, the task has been made much easier. Mixing the oil and gas requires less priming. Unlike the 2-cycle machines that need constant pulling, only a single pull of the cord sets the engine running. These machines help you achieve more with just a little effort.

Reviews of the Best 4-Cycle Weed Eaters

Troy-Bilt TB575 EC 29cc 4-Cycle 17-Inch Straight Shaft Trimmer

Troy-Bilt TB575 EC 29cc 4-Cycle 17-Inch Straight Shaft Trimmer

This trimmer provides you with consistent cutting from season to season. It has an overall dimension of 12.4 x 11.25 x 41.8 inches and weighs at just 13 pounds for easy maneuvering. This trimmer can best be described as a whole package of tools. You might be wondering why? Well, it is designed to be compatible with 10 different attachments. This renders it a multi-functional machine that can accommodate virtually any task around the home. The trimmer is powered by a 29cc engine that eliminates the need for mixing any gas or oil. Therefore, you don’t have to worry about your clothes getting messed up.

With Troy-Bilt TB575, cord pulling is a thing of the past. It provides the convenience of the world’s renown JumpStart Technology. Loading the line has been made much faster and easier. The SpeedSpool 2 bump head equipped in this trimmer can accommodate up to 20 feet of line. It feeds the line automatically so you don’t have to make frequent stops in the middle of your trimming task. It has a 0.095-inch line and a cutting swatch of 17 inches. The trimmer has a straight shaft that enables it to reach beneath shrubs and bushes. It is definitely a real workhorse that provides a good combination of power and great flexibility.

Amazon provides reliable reviews for this trimmer. It had been reviewed by 160 customers at the time of writing. It gets an average score of 3.3 stars out of 5. The trimmer is backed by a 2-year limited warranty.

Key features:

  • 29cc gas-powered engine
  • JumpStart Technology for hassle-free starting
  • Automatic SpeedSpool that loads up to 20 feet of line
  • 10 different tool attachments
  • Straight shaft for extended reach

  • Product
  • Photos

Troy-Bilt TB575 EC 29cc 4-Cycle 17-Inch Straight Shaft Trimmer with JumpStart Technology

Enter your model number above to make sure this fits.; Powerful NO MIX GAS AND OIL 29cc 4-Cycle Engine; JumpStart-capable engine eliminates the need to pull cord (Engine starter sold separately; ...

Available: In stock
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Save your money!!!!! After going thru cheap gas trimmers like disposable lighters, I thought I'd bite the bullet and buy a good one. Well, after spending $199.00 for this troy built, I thought this would last me a while. WRONG!!! I pruchased it from Fleet Farm in Chippewa Falls WI. While using it my third time, I heard a terrible noise, and it suddenly quit. Returning to the store with it, they told me I abused it, and there was nothing they could do (trimming weeds is abuse?! - isnt that what this is supposed to do?) So another $109.00 later, it now had a new flywheel. Tried it again - after about 15 minutes use, there was that horrible noise again, and another sudden stop. I called Troy Built, and was told to take a hike, it was my problem, and they would do nothing for me, but I could send it in and they would install another flywheel for me - Another $109.00 + shipping. My nice new Troy built trimmer now occupies its rightful spot at the local landfill, along with the $308.00 it cost me for about 1-1/2 hours use. Along with the putrid performance of this piece of garbage goes the total lack of service by the selling dealer, FARM AND FLEET in chippewa falls.If youre thinking of buying one of these trimmers - DONT DO IT - it is an expensive paperweight, with absolutely no customer service.
May 1, 2007
I recently purchased and quickly took this trimmer back. I first thought that having a 4 cyle engine was a good thing. Not. First it is very unbalanced and heavy. Second, it is very difficult to start. Third, you are told in the manual to disassemble the engine every 10 hours and adjust the valves. If you don't feel comfortable doing that, they suggest paying money to have it done. What?!!! Oh, they also tell you to make sure you replace the valve cover gasket everytime you do this. The engine was anything but smooth running and replacing the line is a real pain. This product just isn't well engineered. Buyer beware as this is an MTD product which does not have a good reputation for quality products or service.
August 1, 2007
DON'T BUY Troy-Built or MTD Products outdoor equipment!! On this model (and I suspect others) the top drive shaft is defective; as others have mentioned here and other places on internet, it wears out after only about 2 years, right when the warranty quits. I called customer service and spoke with Van (800-800-7310). He claims that the unit worked as it should for 2 years under the warranty; that the drive shaft is designed for 2 years worth of service and that it is a wear and tear item that needs to be replaced from time to time. I told him that is ridiculous, then he hung-up on me. Nice....With a defective driveshaft ($45+shipping), the rest of the unit is useless. I will have to throw it away and purchase a non MTD related replacement. There are other machines for same money that are better. I would certainly stay away from anything Troy-built, or under the umbrella of MTD Products. Customer service will stonewall you forever; they must go home everynight worried that their company will be there in the morning.
October 12, 2007

  • Lightweight for minimum user fatigue
  • Multi-functional
  • Easier to start
  • Can access hard-to-reach places
  • Automatic loading provides great consistency

  • Doesn’t come with an engine starter

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Ryobi ZRRY34440 18-Inch 30cc Straight-Shaft String Trimmer

Ryobi ZRRY34440 18-Inch 30cc Straight-Shaft String Trimmer

Ryobi ZRRY34440 provides the convenience of greater power and lower carbon emission. The trimmer is driven by a 30cc engine that packs enough power to help you cut tough weeds with ease. The trimmer weighs at 15 pounds and measures 11 x 38 x 11 inches. It is ergonomically designed to balance well. There is no mixing of oil and gas which enables you to work in a cleaner environment. It has an attachment system that lets it convert to 6 different tools. This makes is a versatile choice for a trimmer.

The straight shaft provides easy extended reach. It can be used by users of different heights and enables you to reach areas that are hard to access with other types of trimmers. The handles provide a comfortable, non-slip grip for better balance. The flip switch integrated on the trimmer provides an easier time during starting. The trimmer head has a cutting swath of 18 inches for greater efficiency in your trimming task. It is a trimmer that works just as good as new or even better.

This trimmer has a total of 185 customer reviews. It has an average rating of 3.5 out of 5 stars.

Key features:

  • 30cc gas-powered engine
  • Expand-it Attachment converts to 6 different tool
  • Generic string head
  • StartEasy flip-and-go mechanism
  • Straight shaft designed for extended reach

  • Product
  • Photos

Factory Reconditioned Ryobi ZRRY34440 18-Inch 30cc 4-Stroke Gas-Powered Straight-Shaft String Trimmer (Discontinued...

Factory renewed to original condition Ryobi RY34440 4 Cycle Gas Lawn Trimmer. This item was refurbished by the manufacturer to the original condition and is guaranteed to meet or exceed ...

Available: In stock
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Why spend $189 at Home Depot when you can get this for $99? The trimmer arrived and was in like new condition. It started right up and runs great. It has plenty of power. Best of all, no more keeping gas and oil mix around. The down side is that since it is a 4-stroke with an OIL pan of sorts, the edger only operates in the basic trimming position. It you tilt it too much in any direction, oil will enter the cylinder and start smoking. If you continue to run this way, the engine will stall and oil will run out of the carborater. So what this means is it is not very friendly for attachements such as hedge clippers or chain saws and such that you need to run at varying angles.I am fine with this because I really just need this for the basics. I have the edger, trimmer and blower attachments, and they all work great.
April 25, 2010
I've owned numerous Ryobi power tools and have been very happy, however this trimmer (at least the one I got) is an absolute dog. starting with the instruction manual which I thought was woefully inadequate to actual operation. Right out of the box it leaks oil badly (also mentioned in another review) and I'm in the process of trying to return and get my dough back. Be advised Amazon will not take this item back. Stay away is my advice.
April 19, 2010
The item arrived not as pictured, only half the item arrived - the top half - so you have to buy the string trimmer??? Customer service could not answer that for me. The motor part, (gas and oil too)was in pieces and they did not look reconditioned but very USED and very poorly used at that. The motor parts were covered in grease in and out, everything looked like it had been picked up from a junk pile with dents, scratches, and grime all over every single piece. Disgusting!!!! When I called to return the item - they told me I couldn't because it is considered hazardous waste material... so why did they sell it to me??? especially as the item was in such poor condition w/ oil and probably gas too since it was just a mess... DO NOT BUY THIS ITEM.
May 10, 2010

  • Lower noise level and less vibration
  • Lightweight for reduced user fatigue
  • Easy reach in hard-to-access areas
  • Easy to assemble and start
  • Multi-functional attachments

  • Hard to tilt at varying angles

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Ryobi ZRRY34420 18-Inch 30cc Curved-Shaft String Trimmer

Ryobi ZRRY34420 18-Inch 30cc Curved-Shaft String Trimmer

Ryobi ZRRY34420 is designed to perform like new. It is a top-of-the-line trimmer that gives your lawn and garden that clean neat cut. The trimmer measures 11 x 11 x 38 inches. At just 14 pounds, it is quite lightweight for its size. It provides you with the convenience of a higher power to size ratio to enable you to achieve more with less effort. This is a trimmer that can be carried with ease from one job site to another. A powerful 30cc gas-powered engine lets you handle tough weed-cutting applications with ease.

Despite the great power generated by the engine, this trimmer operates quietly and produces less vibration. It comes with a distinctive curved shaft that makes it possible to reach under bushes and shrubs without straining much. The shaft is detachable to provide convenient storage after use. The trimmer is compatible with 0.095-inch line and accommodates up to two 11-inch lines. It has a cutting swath of 18 inches. The trimmer can accept various attachments that convert it into a tool that will shape your lawn in any way you want it.

This trimmer has 99 reviews on Amazon. It gets an average rating of 3.3 out of 5 stars.

Key features:

  • 30cc low-emission engine
  • 18-inch cutting swath
  • Expand-it Attachment System that converts to various tools
  • Curved Shaft Grass Deflector

  • Product

Factory Reconditioned Ryobi ZRRY34420 18-Inch 30cc 4-Stroke Gas-Powered Curved-Shaft String Trimmer with...

This is a factory reconditioned product. Reconditioned generally means that the product has been returned to the manufacturer, who brings the product back to like new condition. Some products may ...

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Last summer I used a very similar Ryobi trimmer with a two stroke engine and a traditional "bump and feed" spool. I liked its easy start and wide swath that it cut. A couple of weeks ago I got it ready for this season and left it on the garage floor and drove my van over it, rendering it useless. I donated it to a high school small engine repair class to play with.And I browsed Amazon for a new trimmer. The price was 89.99 when I bought my new Ryobi, I see it's gone up to 99.99 since. Still worth every penny. It's a refurb, but I couldn't find a mark on it indicating that it had ever been used. I bought a new 1 gallon gas can with a filter and marked Ryobi on the side. I once destroyed my favorite chain saw, a Jonsereds, by putting gas in it. Without the oil. Nowadays every small engine tool gets its own gas can boldly labeled.This new Ryobi has a four stroke engine and, in spite of the warnings from my local small engine dealer, does not feel any heavier than the two stroke and started as easily as the two stroke. Seven squeezes of the primer bulb and a couple of yanks on the cord and the machine was humming like a kitten. And when the line ran out - no spool to rewind! It uses two 11 inch lines, simply inserted in two holes where the head locks the lines into place. It accepts a .095 line which is plenty of heft to do the jobs I intend for it. An even larger line can be used, but I haven't tried that yet.Overall, the new machine works as well and is as easy to handle as its two stroke counterpart, and I feel my money was very well spent.
May 9, 2010
I bought this trimmer on April 24th and used it only once. It would not start after that. I looked at the troubleshooting guide with no luck either. Prime X7 all that stuff did not work. Wanted to return to seller but found out this item is not eligible for return. So basically, I paid $89 for one single use. Will go back to my old trimmer, yeah I will mix but at least I know it will start.
May 15, 2010
Purchased this after my old trimmer was stolen. The box this arrived in was pretty beat up (it traveled less than 100 miles and arrived in about 25 hours), but the trimmer was unharmed. Needed some assembly. Took me about 10 minutes. After putting it together I had one bolt left over that the manual never mentioned.Be careful adding oil, it does not take much. This is one of the causes of the oil leakage people have been complaining about in the straight shaft version. The safety trigger on the top handle is a pain, I took mine off. Idle speed may need adjusted. The throttle has to be fully pressed to see any jump in rpm. I'm going to try and shorten the throttle cable soon to add a little more touch to its ability. A tank of gas on this lasted me about 2 hours. All in all after I make all the adjustments to it I think it will be a fine trimmer.
May 13, 2010

  • Converts to different tools
  • Less vibration and lower emissions
  • Lightweight and portable
  • Can reach virtually any area around the garden

  • Requires constant cord pulling to start

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Poulan Pro 966774301 4-Cycle Gas Straight Shaft Trimmer

Poulan Pro 966774301 4-Cycle Gas Straight Shaft Trimmer

This is a solid weed eater machine that guarantees the best in any trimming operation. The trimmer is quite compact measuring 68.8 x 9 x 11 inches. It has a weight of just 13 pounds, which makes it an ideal choice for those that desire great power and portability in a weed eater. The trimmer is equipped with a 28cc gas engine that provides great performance for longer. The spring assisted start mechanism lets you get started with just one pull of the cord.

Like most 4 cycle machines it doesn’t require mixing of oil and gas. Poulan Pro 966774301 is simple to operate, efficient and accepts various attachments that turn it into a versatile garden tool. The trimmer boasts of a straight shaft with a cutting swath of 17 inches. It is quite easy to maneuver and can be tilted at different angles to enable you to trim your lawn to any shape. The ergonomic handle is designed to be vibration free and provides a secure hold for perfect balance.

The trimmer has 66 customer reviews. Out of all the reviews, it gets an average rating of 3.5 out of 5 stars.

Key features:

  • 28cc gas-powered engine
  • Spring assisted start mechanism
  • ProLink attachment system
  • Split, straight boom shaft
  • 17-inch cutting path

  • Product

Poulan Pro 966774301 4-Cycle Gas Straight Shaft Trimmer

The Poulan Pro PP428S 4-Cycle 28cc straight shaft gas trimmer makes getting started a little easier with no more mixing of fuel and oil like you need to do for 2-cycle engine trimmers. With a spring ...

Available: In stock
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I bought this trimmer because I wanted one that took unleaded gas without mixing oil and one that could utilize my Ryobi expand it attachments from my previous machine. My last trimmer was a 26cc 2-cycle Ryobi that was lightly used for less than two summers and then decided not to turn on again. After trying everything to get it running I came to the conclussion that it improper gas oil mixing may have damaged the engine. Buying this machine has been one of the best decisions I have made in a long time. It started almost immediately and performs as promised. And it took my Ryobi edging attachment as expected. I just purchased the leaf blower attachment and it is awesome for the price. Everything just seems simplier with this machine and I love its solid construction. I hope to get many years out of this.
June 10, 2013
I have used this through one spool of trimmer line so far. I specifically wanted a 4-cycle trimmer and have a 4-cycle Troy Built blower also. The Poulan Pro has done an exceptional job, thanks to enough power and .095" size line. I have used it to edge the curb overgrown with tough evergreen ground cover and rampant ivy. For simple routine yard work, most can be done at half-throttle or less.For the tough stuff, I installed a Grass Gator 4680 brush cutter. It fits this model, and it has the power to take on hard 1 1/2" stalks and 1" hardwood saplings without problems. I have yet to tackle the tough wild wisteria vines, but expect similar results.Maybe minor shortcomings for some, but for me the controls ergonomics could be so much better. The pull cord handle is too small, the detents for the choke lever are vague, throttle modulation is not real smooth, and the kill toggle gets hit accidentally at times and stops the trimmer - I had to learn to check the switch first.
August 7, 2013
This is the umpteenth weed wacker I have bought ... I have had regular gas models, two-stroke models, electric models, diesel models...we, OK, no diesel, but if there was one, I'd have bought it. My wife says I'll buy anything with a #$$$@!&$ engine on it.No quite true ,,,, anyway, this Poulan is just OK. It's hard to start, and once running it doesn't want to idle. When you are wacking at full throttle, it's fine, Power is good. The bump type line feeder works ... seems like the line does not last very long. All of my attachments (Ryobi) will work with this model, so that's a plus. Amazon Prime got it too me fast as usual. Wish they had a Prime "Stealth" service, so wives couldn't tell what's in the box .. that would make life at lot easier.
June 25, 2014

  • Easy to start
  • Portable weed eating machine
  • Provides easy reach in any area
  • Accepts different attachments

  • The throttle modulation is not quite smooth

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Troy-Bilt TB525 EC 29cc 4-Cycle 17-Inch Curved Shaft Trimmer

Troy-Bilt TB525 EC 29cc 4-Cycle 17-Inch Curved Shaft Trimmer

TB525 is a string trimmer that stands true to Troy-Bilt’s reputation in the world of weed eaters. This is a machine that is designed with user comfort in mind. The trimmer is 37 x 10 x 10 inches and weighs at 15.8 pounds. It provides one of the easiest maneuvers of any weed cutting machine. The 29cc engine is designed to power you through tough trimming tasks and has a reputation of lasting for longer. Like most of the company’s trimmers, it is equipped with a JumpStart Technology that makes starting quite hassle-free.

This trimmer is attachment capable. It can easily convert to a pole saw or edger in just a matter of seconds. Line loading is done automatically to save you time. The trimmer accepts 0.095-inch line size and has a cutting path of 17 inches. It accommodates up to 20 feet of line. The shaft is angled to provide better balance and make the cutting line more visible.

TB525 string trimmer has been reviewed by 103 customers. The machine has an average score of 3.1 out of 5 stars. It comes with a 2-year limited warranty to cater for any inconveniences.

Key features:

  • 29cc gas-powered engine
  • 17-inch cutting width
  • SpeedSpool 2 bump head that loads up to 20 feet of line
  • TrimmerPlus attachments convert it into 10 different tools
  • JumpStart technology provides easy starting
  • Angled boom provides clear view of cut line

  • Product
  • Photos

Troy-Bilt TB525 EC 29cc 4-Cycle 17-Inch Curved Shaft Trimmer with JumpStart Technology

Enter your model number above to make sure this fits.; This gas trimmer gives both power and comfort features, while the curved shaft balances the trimmer for a direct view of the cutting line; The ...

Available: In stock
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Trying to replace my Ryobi trimmer which decided to quit after about 6 yrs. Never had a problem with the Ryobi and I had all the attachments and didn't want to buy everything over again. The Troy Bilt is the exact same trimmer as the Ryobi. Also wanted to stay with the 4 cycle instead of the mess of gas/oil mix with the 2 cycle. The trimmer is a little heavy, but does seem to be pretty balanced. Starting is very easy. The only recommendation I'd make is the difference between the curved and straight shaft. I'm 6'2" and now have both types. I really notice a difference with the curved shaft--much more bending which my back notices by the time I'm finished with the trimming. Taller people should lean toward the model with the straight shaft. If you have been shopping, this is the exact models that Lowes sells. The price difference is much less on Amazon. Lowes wanted $169 for this model. When I bought on Amazon the price was $83 with free shipping. The price has since increased, but is still much less than Lowes. If you're looking for a trimmer with capability for attachments, I would recommend this trimmer.
October 15, 2007
Bought this one at Lowes 3 weekends back. Starting the trimmer was a very smooth operation. Just followed the procedure exactly the way they had described. It vibrates quite a bit, but you get used to it. After exactly 3 feet of trimming the string broke. I tried bumping the head to release the line but that didn't do anything. Opened the head to find out that the string had welded inside to the plastic and wouldn't move. So had to remove and wind both the strings again. After about 20 feet more the string gave way again. Again, followed the instructions to release the line, by bumping it on the surface, didn't work. I opened the head again and found out this time the string was just stuck and wouldn't move.After about an hour of fighting around I gave up.Started the trimmer the next weekend and had to stop 3 times to fight with the string release. On the 4th try, I emptied the gas tank, drove back to Lowes, and got my money back.I am now again on a lookout for a 4-cycle trimmer.
June 4, 2009
Save yourself time and money, this product makes you re-adjust the line every ten feet while trimming. The line continually breaks off and you have to restring it. DO NOT PURCHASE THIS PRODUCT!
August 22, 2011

  • Quick and easy loading of line
  • Easy to start
  • Cutting line is visible
  • Lightweight and balances well
  • Accepts multiple attachments

  • Doesn’t come with the engine starter

How to Choose the

 4 cycle Weed Eater

If you desire a well-trimmed lawn that will be the envy of the neighborhood, then you have to choose the right machine for the job. But where do you start from? Well, I will outline the different factors that you need to put in mind while on the market.

  • Price
    Different weed eaters come with different price tags. Therefore, it would be better to first know your range. Don’t select a weed eater machine that will weigh you down in terms of cash. Go for one that is within your budget and has the right features that will deliver as per your expectations.
  • Brand
    There are many manufacturers of 4 cycle weed eating machines. However, your main aim would be to determine those who perform the best and are known to produce superior quality machines. Brands to go for include Ryobi, Troy-Bilt, and Poulan, among others.
  • Warranty
    What warranty does the manufacturer provide for the product? If there isn’t any warranty then it would be best to stay away from that product. Most string trimmers come with an at least 2-year limited warranty to cover defects in materials or poor craftsmanship.
  • Customer reviews
    Reading customer reviews is the simplest way to choosing the best string trimmer on the market. Get to know what customers are saying regarding a particular model. Weigh the pros and cons they give to that model and decide if it’s the best match for your needs.


At the moment, I know you may be trying to figure out what the best machine is among the reviewed models. Well, after going through the different features and benefits of each machine, I must say that Poulan Pro 966774301 4-Cycle Gas Straight Shaft Trimmer beats them all. This 4 cycle weed eater is priced well for the performance it provides. The machine provides a perfect balance of power and great ergonomics that make the trimming process quite hassle-free. It receives many positive reviews from customers who have used it and I’m confident that it is the machine that will work for you.


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