FS-KM Line Head Trimmer - $99.99 DSRP


Distributor Suggested Retail Price
FS-KM Line Head Trimmer

DSRP: $99.99

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This STIHL KombiSystem line head trimmer attachment is designed for trimming around obstacles.

Trimmer AttachmentUses the dependable AutoCut® head. Designed for mowing and trimming around obstacles.

NOTE: STIHL KombiMotors and STIHL KombiSystem attachments are sold separately.

Print Spec Sheets
FS-KM Line Head Trimmer Specifications
WEIGHT 1.2 kg (2.6 lbs.)*
*Without cutting tool, without deflector
Important Information
WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
ADVERTENCIA: Cáncer y Daño Reproductivo - www.p65warnings.ca.gov
WARNING! Improper use of any power tool may cause serious or fatal injury. Read, understand and follow carefully the operating and safety instructions in your instruction manual before using such products.

STIHL products sold through U.S. STIHL Dealers are for distribution in the United States only.
Click to view the STIHL Limited Warranty Time Periods
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FS-KM Line Head Trimmer is rated 3.4 out of 5 by 49.
Rated 5 out of 5 by from FS-KM line head trimmer I purchased this trimmer with the KM 94R power head and the HT-KM pole trimmer. I have had this Kombi combination long enough to know that this trimmer is the best trimmer that I’ve used. I find it is easy to replace string in the field, no tools needed. I have used several different replacement strings without any problems with feed. The 94R has more than enough power for this attachment, although it is heavier than a dedicated trimmer. I have not had an issue with either piece in the eight years that I’ve owned them.
Date published: 2018-04-21
Rated 2 out of 5 by from Initial review after using the km91 head with the line trimmer After about 5min of use both lines broke with the line supplied with the unit when purchased. I didn't see any instrcutions but after looking at the trimmer head was able to dissamble the unit and re-thread the line. Both lines broke again within 5min. RE-streaded the line again. This time I tried to advance the line regularly. The trimmer line will break quickly and force you to fix it if you are cutting along any sort of fence/stone/hard edge and let the trimmer get within a couple of inchs. I found if I stayed farther away from things it was less likely to force me to stop and fix it. I had the lines break maybe 5 times for I was able to run the unit long enough to use up the spool. Reloading was easy enough if you read the bottom of the trimmer head spool as it is labeled with instructions to wind the line.I also have a 660cm chain saw which I love and a 56 hedge trimmer which I start up and just trim things because frankly it is fun to use....the trimmer is not so much fun at this point, I am a little disappointed with it to be honest.
Date published: 2018-04-15
Rated 5 out of 5 by from It just works. After having several trimmers over the years and using others at various points in my life, I can honestly say this one is the best. From batter powered, to gas powered, nothing beats this trimmer. Using ONLY STIHL trimmer line, it has always conquered any job I have given it and even though the winding of the trimmer line can get a bit annoying, its far and away worth it to have it simply dominate anything I can put in front of it.
Date published: 2018-04-12
Rated 1 out of 5 by from Autocut 25-2 This has to be the worst auto line feeder head I have ever used. I have yet to go through a full load without having a misfeed on one or both lines. Currently looking for a replacement head.
Date published: 2018-04-03
Rated 5 out of 5 by from Great Alternative to Multiple Tools This was the first attachment that I bought with my KM90R. I'm a residential homeowner and I use it semi-frequently (a few times a month). It's easy to store, easy to wind line, and the head is strong and stout enough to handle .095 line to cut through the thick stuff.
Date published: 2018-03-08
Rated 4 out of 5 by from Almost perfect but has one caveat I purchased this in combination with a 111 power head. It's a great combination. The 111 drives this thing perfectly. I replaced a homeowner type gas trimmmer with this and have also used home owner Stihl trimmers and a couple professional dedicated trimmers. Comparatively speaking this thing is a beast. I usually run it along my edged beds in a verticle position to quasi-edge my lawn. It works well for this. I did notice on the first day that the trimmer line does often break off right by the head. That was a pain for the first 15 minutes. Others have complained about the same issue. I then started refreshing the string (tapping it and letting out more line) more frequently, keeping the line length longer. This solved the issue completely. Now it's a pleasure to use. Replacing the string is fairly easy compared to my old big box store trimmer.... and it holds a lot more. I use this addition to a bunch of other Kombi attachments. Overall the Kombi system is a fantastic system. Highly recommend. I hope this review was helpful!
Date published: 2017-11-29
Rated 5 out of 5 by from Shin/Echo Speed feed head Just buy the Shindiwa/Echo speed feed head when you get this.Speed Feed head come's with attachments to put on Stihl and you have the perfect product Speed feed head is the only good thing Shin/Echo make's Dont give Stihl a bad Name because you Dont know how to restring a trimmer do Some research first or drive up to the first professional Landscaper you see with stihl products and ask them to show you
Date published: 2017-11-01
Rated 5 out of 5 by from Love this trimmer After having had a Poluan pro for almost 20 years I replaced it with this product. I do not understand the negative reviews over line issues. You wind it on evenly and it works fine. If you have a problem figuring out how to do it there's a YouTube link on the website on how to do it. I have never encountered a better string trimmer. The only negative thing I could possibly say is that I could not find anywhere in the manual that specified the string size. But my salesman said I could use 90 or 105.
Date published: 2017-08-28
Rated 3 out of 5 by from Poor documentation and support I just purchased the FS-KM Line Head Trimmer and had to return it to the dealer because it would not work. The trimmer was fixed so I used it several times and then had to replace the line. So how much line goes on the spool? I went to the manual to get instructions on how to rewind the string. There are no instructions!! Really!!!!This information should be on the inside cover of the manual!!! It's not even on the website under the specific product! Poor design!I called the 800 number and left a message for technical support and sent in a request for the information on the website. After 2 hours I did receive a call back with the magic number of "about 12ft". Something so basic makes me wonder if I made the correct brand decision.
Date published: 2017-08-25
Rated 2 out of 5 by from Frustrating line breaks I just don't understand Stihl! I bought it because I wanted the best and the best support. The string broke twice within the first 20 minutes of use. If you need to soak the string, the dealer should have told us this. Instead the dealer said we must be cutting things with a diameter larger than it could handle. This was not the case.So then I went to the manual to get instructions on how to rewind the string. There are no instructions!! That is inexcusable! I will try soaking the string or installing new string, assuming I can find some instructions, but if this continues to happen, I'm taking it back and expect a full refund.
Date published: 2017-07-05
Rated 5 out of 5 by from Kombi System Bought a year ago and love it !!! Even after winter started up with three pulls. Got this with the pole saw, and even after hours of use taking care of 12 plus acres I'm as pleased as the day I first got it. Highly recommend to anybody who has a large property to care for.
Date published: 2017-06-28
Rated 5 out of 5 by from Great trimmer No string problems works great. I did buy the larger shield.
Date published: 2017-06-19
Rated 4 out of 5 by from Trims nice, but buy a face shield Replaced a 20 year old FS36 with a new kombi system power head and the FS-KM trimmer. This is a nice replacement set up. Starts much easier, not as loud, and a larger gas tank.I have not had any of the string problems mentioned by others here after re-wraping the string on the head cleaner then how it came from the dealer.My only dislike is with the very small string shield, grass, sand, and small pebbles fly everywhere including up into your face. I suggest if you do not already own one purchase a face mask right away if you purchase this head. I have always used safety glasses and hearing protection in the past, that is not sufficient for this model.
Date published: 2017-06-03
Rated 1 out of 5 by from Line Issues I purchased this head trimmer attachment for my kombi system and am having the same line issues as everyone else. The line constantly breaks off inside the head. I see Stihl responding with the same "soak your line in water" response to everyone. What I dont understand is why Stihl isn't doing anything about the actual issue? I've never had to soak a competitor's line in water, ever. Maybe Stihl should think about sourcing their trimmer line from a different supplier, and replace those of us who purchased the faulty line with higher quality line. This attachment will be sitting in the shed if i have to constantly stop and re-line the trimmer.
Date published: 2017-05-16
Rated 5 out of 5 by from Excellent attachment paired with KM130 Prior to purchasing this Kombi System I had purchased a similar system from A competitor years ago and was left underwhelmed and firm believer in purchasing each tool for specific task. Nick, Harris Ace Hardware's (Hinesville, GA) Stihl mechanic/ sales, coupled with reviews online and price savings vs purchasing each tool separately after shop was burglarized and equipment stolen swayed me to try this line. I purchased each attachment from pole saw, brush cutter, blower, trimmer and straight edger and have been blown away by the power and versatility of the entire system. I have read all the reviews of the line breaking and have to attribute this to user error as I have not had one issue from this head even when flipping it to edge sidewalks, beds and curbs which will quickly run through the best string. If you have prior knowledge of the button and correctly spool the string then you should rarely encounter any line breaking within the head. The deflector was adequate for me in rocky soil and thick weeds. The power can be to much for some applications and have to feather it to about 3/4 or else a spool of string can be deceimated quickly. All of the other attachments are also top notch and the only complaint is the balance of the system but benefits far outweigh any negatives.
Date published: 2017-01-13
Rated 4 out of 5 by from Line cutting in the spool issues Ok, great product. However, you have to know how to properly put the line in this or you are doomed to failure. I was in fact doomed to failure because I didn't know the tricks. I watched the dealer guy spool the line in, He did it evenly and once he was done, he put the spool in, fastened the cover back on, then he pulled on both lines, then "click". Bamm good to go. That was literally the only thing I was missing and that made an absolute world of difference.
Date published: 2016-10-10
Rated 2 out of 5 by from The head stinks Used the trimmer for the first time today about 20 min total run time. During that 20 minutes the line broke off inside the head 3 times. It's a major inconvenience to stop what your doing and rewind the string constantly. The deflector is a joke buy the large deflector and toss the little piece of junk in the trash before you leave the dealer.
Date published: 2016-09-24
Rated 5 out of 5 by from Satisfied overall Trimmer head is just ok. I have not tried soaking the line though. Sometimes breaks off line completely. Not a quick fix. Question; Is the trimmer head the same on the FS 90R as my KM90R?
Date published: 2016-09-12
Rated 2 out of 5 by from Constant problems with trimmer line heads Without exaggeration I've spent more time messing with the trimmer head than I've spent using this attachment. The first 1/2 hour of use was good, the line fed as it should, then the problems started and never stopped.The problem is the trimmer line breaks off in the head and when it doesn't do that it ties itself up in the head. I've bought new line, and re-wound the spools, and had the same issues. I've bought a second head, and re-wound it. The problems started with heads and line out of the box from the manufacturer, so it's not operator error.The trimmer works adequately when it works...which has been about ten minutes tops until there is a line problem. I love the Kombi idea, the trimmer attachment attaches quickly, the power head is great, but the line heads are ridiculously fussy and should not require so much attention.
Date published: 2016-09-12
Rated 2 out of 5 by from Suppose to be the best Doesn't seem to be running right. dealer says it's O.K. Sputters at full throttle.
Date published: 2016-09-07
Rated 3 out of 5 by from Great Kombi tool, but..... This is another great Kombi attachment! However, the bump and feed trimmer head is no better than any other out there. I was hoping it would perform better than those I've owned in the past but not so. I spent more time fishing broken line out of the head and rewinding the line than I did trimming! I finally bought the Durocut head and installed it. WHAT A DIFFERENCE!! I would recommend doing the same when you puchase this attachment. It will save you a lot of frustration!
Date published: 2016-06-14
Rated 5 out of 5 by from Good trimmer attachment, same issues with head as others. The trimmer itself is fine. I do have the same issues other have talked about with the auto dispensing head though. Sometimes I lose the line completely and have to pop the cap off and refeed it. A bit of a pain.But, I have worked with other trimmers and it has the same issues.
Date published: 2016-04-25
Rated 5 out of 5 by from 20 Years Strong I guess after 20 years, I can say it's good product! Bought with KM 55 powerhead based on recommendation of Reynolds Farm Machinary in Fishers, Indiana. When I looked for a brush blade attachment last year, the salesman who sold me original unit helped me and still had record of my purc&ase! Don't even think about getting this kind of service from a big box store.
Date published: 2016-04-05
Rated 4 out of 5 by from Solid build Well built tool. High torque with the km90. Too much so to trim gently along vinyl fence without tearing it up. Neighbor ran it over turning car around on my lawn. Bent it really bad. Straightened it in the fork of a tree. Been using it for a year since then with no problems.
Date published: 2015-11-19
Rated 2 out of 5 by from Problem with cutting line AutoCut feature is not that great, when I can keep line in it, it works OK but the problem is keeping line in the head or getting it to feed when it should. Have to take the head apart to get the line extended, not very time saving.
Date published: 2015-04-06
Rated 4 out of 5 by from Great trimmer, shield needs a little work. Have had this trimmer for two years now. The head unspun once in the beginning but hasn't since reattaching. The line is a piece-o-cake to reload, thanks to the little notches in the spool. Far easier than any two line trimmer I've ever used. Changing the unit on the Kombi motor is easy and a very strong joint. Our only complaint is that the spatter shield leaves little to be desired and provides little protection. I understand the need for safety glasses or shield and ear plugs when using power equipment, but you better put on a full coverage rainsuit in the spring when weeds are full of liquid.
Date published: 2014-09-25
Rated 5 out of 5 by from Like a breath of fresh air I had brought my trimmer in for repairs. Here in Florida, August is a very busy time for the repair shop. After a couple of weeks, it was determined that the old one was not worth the repair. Enter this new trimmer.What a difference!! This machine trims grass like a hot knife through butter. My grass was very overgrown and thick.. My new Stihl made short work of a job I was partially dreading. It has plenty of power. Even throttling the motor back by more than half, I was able to cut through very thick St. Augustine grass (think very thick crabgrass) with no loss in power. The motor seems to have more than ample torque.The tap design meters out just enough line so one tap is all that is needed. The balance is good and there is virtually no vibration. Because I am able to throttle back the motor so much, this trimmer is much quieter than my previous trimmer. And, it probably used less gas.I have had this system for over 6 years. Both the edger and hedge trimmer are still working flawlessly. Here in Florida, we tend to the grass and yard all year around. So, this would be the equivalent to many more years in cooler climates.
Date published: 2014-09-05
Rated 4 out of 5 by from Powerful product With the KM 130R, this has so much power that you almost can even use it lightly. There's no feathering it. But overall, a very reliable and good product.
Date published: 2014-08-17
Rated 5 out of 5 by from Excellent product! I have this attachment on a KM90R. Together, these two tools are an absolute terror on all but the thickest weeds such as full grown bull thistles. The only times I could maybe use a little more power, is with very thick fine tall grass.The cutting head itself performs beautifully. It does not plug easily, the line bumps reliably, IMO the head is relatively simple to reload with line, and meets 100% of my expectations.I typically run .105 diameter line for better durability against the thick weeds.Also, something not mentioned, is that this head is easily converted to run saw blades with a modest hardware change. The KM90R handles a saw blade with plenty of power.BTW, There are some complaints of line breaking, but I suspect that is a line weakness issue and NOT an issue with the 25-2 Autocut head.
Date published: 2014-07-14
Rated 2 out of 5 by from Somewhat disappointing in the design Bought this tool as part of the Kombi system and have been somewhat disappointed, mainly due to problems with the bump and go design. While the tiller tool works great, the trimmer isn't as great. Have found it tedious to load new line and more difficult to get the head off to pull the line back out after it has retracted, which occurs quite often. You need to carry a screwdriver with you because it is extremely difficult to release the cover on the line container without it. I spend more time pulling the line back out or reloading new line in than I spend trimming. It is also a rather heavy trimmer, which makes it more difficult to use when edging, but this is probably due more to the motor weight than the tool. The Stihl engine works great, starts easy, but the trimmer attachment is not of equal quality of design. (BTW, the instruction manual is of little value when it comes to how to load the line or the bump & go feature.)
Date published: 2014-06-05
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