So You Own A...Stihl FS 91R String Trimmer

[@jonathancomfort9939]

My season is 365 days a year 🌴😉🙂. Owned fs91r a little over a year. I run mine in a tropical climate 6 days a week minimum 3 hours each day...best machine in the world!!! Good video✌️🌴🤙

[@redoakpropertycarellc]

I really like mine

[@Jordon_Fischer]

I’m gonna try and buy one today

[@BasicPurple]

I keep coming back to these i can't thank you enough

[@mrbrown6421]

Very nice video. Thank you. I am repairing 2 of these that are owned by my neighbor. "They don't run worth a XXXX!" PROBLEM: He leaves them on his trailer and they get rained on. A lot. Less than 2 years old and every part that can rust, has rusted. Yes, the air filters were soaked with water and indeed, they were growing MOLD. I have NEVER seen that before. I cleaned them up and replaced air filters. Absolutely awesome machines. I wish the idiot would take care of his equipment. -- North Central Florida

[@joeblow4888]

Love the newer 26-2 heads for reloading. Genius way of reloading, love it!!!!!

[@chubbyrain3]

Just bought one of these. Fantastic video of the basics to get you started. Thanks for sharing your knowledge and experience.

[@thomaskirby7475]

Just bought this model, love it

[@Jakg8484]

Just bought mine yesterday. Love it so far

[@jonathancomfort9939]

You deserve a raise, great video! Shout out to Jeremy Farr in South Dakotah(licensed Stihl Mechanic)who convinced me to buy the fs91r, bg96, and two chainsaws. Fa'afetai Telelava Neil's Ace Home Center in Am. Samoa for carrying Stihl Products!

[@Carlsmower]

Nice work

[@WalterLaforme]

I got mine 4 years ago. I find it great, I have 2.5 ac. To cut for the stuff that gets around 2 feet tall i put on my grass blade and use it like a bushhog. I have never had an issue and run it full speed 98% of the time. I don't really know what you guys are talking about rev limitter

[@juanr859]

Excellent video. I appreciate your easy to follow presentation. Your verbal skills are engaging

[@andydouglass1374]

I have had an FS91r for years, usually using the string head and the metal blade (when its wet enough out to not worry about fires). I have a polycut head for it that has some german writing on it and in english it says "Grassbuster". Its been a while since I've used it, and I can't find the manual for the head. I went to put new stihl polycut blades on it and it is nothing like any of the videos I can find. Every video I see for similar heads on a Stihl just have the polycut blades sitting very loosely on the bolt. My old polycut blades that are still in the grassbuster head have metal bushings pressed into them; the bolt goes through the lower half of the head, then through the bushing in the blade, then there is a "threaded washer" on the bolt, and finally it goes into the retained nuts on the upper half of the head. So I had to tap the bushings out of the old blades using a large socket underneath and a smaller socket on top. Of course the bushings won't press into the new blades easily. I tried tapping them in but they are impossible to get in. So I was able to get the bushings seated into the new blades by assembling everything in the right order and tightening the head together which got the bushings seated in. I then had to take the head apart, and tap each bushing in further with a hammer. Now when I put it together, the threaded washers can thread all the way down the bolt until they drop off the threads and just float on the bolt shaft next to the bushing/blade. I am not going to spin this thing up with these washers rattling around loose on the bolts inside the head. Why did a Stihl dealer sell me this head which makes replacing polycuts nearly impossible when every head I see online, you just open the head up and drop new blades onto the bolts?

[@CameronPeebles]

Awesome video, you're a wealth of knowledge. Cheers

[@jasonpanozzo3317]

Thank you for being clear, informative and fun about it

[@samuelpenta8745]

I could be wrong, but I thought the 91r was a 4 stroke machine? Great video btw!!

[@Carlsmower]

4-mix. Mixed fuel 4 stroke

[@therrienmichael08]

I'm in Florida and do year round trimming and trimming and trimming...

[@hectorguerra3435]

Appreciate your time

[@OntarioOutdoorsEnterprisesInc]

Just bought one of these last week for my lawn business to run alongside my 94r I love them both. 91r has great power for the size and the extra weight doesn't seem to be an issue

[@byronlopez6787]

I just ordered my, I hope 🤞🏽 I can get couple off years out of my FS91R😌.

[@thomaskirby7475]

My number one question, do i need to gress the gear box straight out of the box..

[@louiegarcia7527]

great demo my friend. i love stihl products.

[@tgwinternational3296]

great video I have the older modle form the FS 91 R witch is the FS 90 R

[@Carlsmower]

Loved the 90

[@CKID-dv8tq]

Yup I love mine !

[@tango165]

Another great video, keep up the great work Josh!

[@harryerhart5978]

Remember too all 4 mix carburetors have a accelerator pump so never hold the throttle open or pump the trigger you will flood the engine 😁

[@traceylamping6981]

Great video, thank you very much!!

[@snoopfurlow1275]

They wont hold up due to cam failure,crank seals, piston freezing up, lubricant system failure! Get the 250r or their fs 56 ,had 3 engine go bad

[@redoakpropertycarellc]

Love mine

[@normanjackson9591]

Great video n very informative! 5-14-23

[@gregblankenship7584]

Thanks Carl

[@Carlsmower]

👍

[@bigjoe4030]

That fuel is expensive but worth it in the long term

[@prenticedarlington2720]

Good video. Just bought one of these with the larger handles and three bladed cutting head. The shop didn't ha e the correct (25-2) autocut head but I used instead a 36-2 head. Seems okay but probably not as light and responsive as it could otherwise be. I hope my choice of head isn't going to cause any other issues.

[@prenticedarlington2720]

*have

[@Troygehring]

Nice video guys!

[@davidpavely4539]

Exactly what I wanted to know about the vibration sleeve. That thing is annoying

[@Carlsmower]

Yeah man just get rid of it

[@Strelnikov10]

Those little bottles I got say they make 2 gallons. They look like the same ones you’ve got.

[@romaldothomas8653]

Great video thanks for sharing

[@MrSilvervw]

Fantastic content 👌 👏 👍

[@joshualake4882]

What is the largest diameter line you can run on the factory head

[@80sFreak100]

Great video!!! I just bought one of these and used it for the first time today. However, there was a problem. The bump head would not let any more line out. So, I removed the cover and discovered that the line was overlapping itself on each spool, preventing any line from being released. It appeared to be intentionally done by the manufacturer.

[@Carlsmower]

I’m sorry about that experience, we try to always make it a habit to rewind all of the heads on the machines we sell as we found it an opportunity to eliminate any bad experiences like you may have had. If you need assistance with the rewinding of the head we’ve got a great video on that.

[@Pb_Slinger]

What’s the purpose of the black plastic sleeve betwixt the grip and throttle? I want to remove mine to gain more adjustment out of the handle.

[@carlsmowerandsaw]

It is just a visual to know if the handle is outside of the maximum allowable vibration area.

[@Pb_Slinger]

@@carlsmowerandsaw so I guess you would say don’t remove it?

[@kelwinskilltwin_yt5958]

Those the air filter on the 91 same as the 111 yes or no plz reply

[@severoferova5928]

Do you adjust the valves

[@charlesmagicien207]

great video

[@bmc_rc6212]

Great info and video. Could you do a video on the fs 91 bike handle version? We just purchased one for our property

[@Carlsmower]

Yes! We'll fold it into our list. Anything specific, or just an overview?

[@bmc_rc6212]

@@Carlsmower great awesome! Yea just a general overview, I already know a lot about the machine from working at our Ace Hardware wiht the\Stihl department, but always like watching you’re videos.

[@locodiablo8130]

so the fs91r vs the km91r... are they they same specs other than the km being a kombi unit?

[@randycurtis1623]

I bought one almost 2 years ago and I can't get it to start

[@AnthonyCabrera-cy4rx]

I have that same unit, and i always use 93 octane gas with Stihl HP ultra oil. Is okay to use .105 line??

[@andrewkennedy9704]

Yes

[@jonathancomfort9939]

Oh yeah...by the way, I can wear down a plastic bump head in about month and a half. It is impossible at some of the places I cut to avoid running it over buried/partially exposed lava rocks/boulders down to the small lava cinder bits. The metal disc that you load two strings manually is the best for longevity, but not speed🙄. The brush blade is BAAAAD to the BONE!! Can't work without Stihl Products!!!

[@Carlsmower]

That lava rock will crush the bump heads.

[@richfortin08]

Facts… never seen a lava rock in person being in the northeast lol but I will say going thru some of the drainage ditches and hillsides full of granite and what not we’d need 1 new head for 1 machine out of 3 per year . Not bad in my mind for condo maintenance

[@shawndubay4050]

If you can find a grass patch tap more string on the grass or even dirt. Your cutting heads will last alot longer. Concrete, rock and blacktop is like taking a grinder to it.

[@RicardoHernandez-zr1pw]

Troubleshooting it is tough.

[@hrdman2luv]

Two pumps passed the full primer bulb.

[@dougm.635]

Can we add attachments to ours (pruner, brush cutter etc) ?

[@Carlsmower]

You can add gearbox attachments.

[@BobbyOfEarth]

Motomix at $63 per gal... not likely!

[@brucelewis1017]

It's $28 to $38 here where I live

[@harryerhart5978]

Nice video buddy l love mine can you really tell a weight difference between the 91 111 and the 131 l can't maybe put them on a scale l also have a 111rx but it seems to have less torque and more rpm because of the different gear box l might get a 131 for the torque 😊😊 thanks Harry Erhart Landscaping

[@Carlsmower]

Weight difference by the book is 0 but I should put them on a scale sometime. (Note to self buy a scale 😉)

[@harryerhart5978]

@@Carlsmower l use a bathroom scale 😄

[@Carlsmower]

@@harryerhart5978 and I don’t even own one of them. I could take them to the gym with me.

[@knightimusprime25]

all 4 mixes weigh exactly the same

[@RicardoHernandez-zr1pw]

I’ll just buy the battery one.

[@peggywilliams-n9x]

What's the cost

[@philipa4707]

What is the shelf life of an unopened can?

[@johnwinger2240]

2yr

[@kenadams3951]

Cooll little can

[@joeraptor1]

Can you feather the trigger on the FS91 like you can on the FS94? In the past, the 4 mix units were all of nothing. Sometimes, you just need a small amount of power such as when you're around flowerbeds. I'm trying to decided between the FS94 or FS91. Thanks

[@Carlsmower]

The 4 mix definitely have a quicker throttle response they have changed the trigger design that allows you to use your pinky as a blocker and I found that helps a lot of people out check it out

[@joeraptor1]

Thanks for the tip. So, would you recommend the 91r over the 94r. They're both the same price ($479 Canadian) where I live. I did find a pretty good used 94r with about 10 hours on it for $380. There's no warranty left on it and the owner can't find the bill of sale but it does look like it's in great shape. Not sure if it would make more sense to go that route to save some dollars.

[@Carlsmower]

@@joeraptor1 I’m a fan of the 91. Honestly seems as though cost of ownership is less. And power is better

[@andrew5550]

Buy a two stroke do not buy this model read my earlier comment I bought two of these for my business they're terrible no power

[@joeraptor1]

@@andrew5550 Thanks for the tip. My dealer is steering me away from the 94 as it says it's the one that has the most issues and that they get back in for repairs and warranty work. He advised that I go with the 91 or the 70.

[@carterbusby239]

Can I add a brush cutter to this? Thanks.

[@Carlsmower]

Absolutely! Here is a link kzbin.info/www/bejne/h6WYmIJ4pKl_pLM

[@akent46]

What?! Four stroke? I've been out of the game too long 🤣

[@jeffstanley4593]

The handle was not made correctly. You have a hard time tightening the handle into position because the "loop" blocks the screws. Further, the nuts holding the screws are square when they should have been hex locking nuts. Design oversight that even I can see.

[@richardhetrick4770]

I thought aircraft has lead free no ethenol in aircraft has faa forbids ethenol and faa requires dedacated trailer

[@ryanfoley9999]

Got a question for ya will that weedeater run all gear box attachments.

[@Carlsmower]

Yes all but the Blower and curved edger

[@ryanfoley9999]

Ok cool we have 3 blowers & a straight shaft trimmer dad tried to tell me it wouldn't work that way so I sent him your video he ain't said a word since he has the older split shaft fs91r.

[@troelskiel1167]

Isn't it a four stroke?

[@johnwinger2240]

It is but still uses the gas oil mix to lube the necessary components that a four stroke possesses

[@stevek4546]

At the first of the video you said it was a 2 stroke then halfway through you said it was 4 stroke...?????

[@jimmythepirate494]

IMHO Lucas oil is way better than Stihl oil in Stihl products. I'm not the only one who believes this. My BR600 blower and FS 91 trimmer have more HP when using other than Stihl oil.

[@andrew5550]

Buy a two stroke...i have two of these 91's very lil power compared to my two stroke stihls.They are 4 stroke mix lol...might be ok for a home owner with a lil neighborhood lawn...but for serious work and tall grass there a joke...your constantly listening to it blubber in the rev limiter.All mine need is a big trash can...my fault got suckered into trying the new 4 strokes...should have known better

[@Carlsmower]

What 2 strokes do you run?

[@andrew5550]

@@Carlsmower 450r is my main one...It's heavy but it has a lot of power

[@andrew5550]

@@Carlsmower I meant 240 R

[@Carlsmower]

@@andrew5550 well that 1+ hp gain will dominate a 91. The 240 is awesome

[@andrew5550]

@@Carlsmower I have smaller two strokes also

[@colestaples2010]

My 91 is very unreliable

[@willjones9218]

Same here

[@colestaples2010]

@@willjones9218 check your tank vent. That’s what I found wrong with mine this last time

[@AlphaAl1]

You lost me at two cycle!!!

[@cjm5161]

Stihl 2 cycle oil is the stinkiest stuff ever. I use off brand 2 cycle oil to avoid the smell.

[@cain2655]

I bought one of these last summer. What a piece of shit 4 stroke I figured I'd try one all the stihl trimmers I used were 2 stroke. it belongs in a trashcan. What a piece of garbage you have to run it at three-quarter throttle or it just stays in the revel limiter I put the thing on craigslist and sold the piece of shit. It was gutless went and bought a 240 R two-stroke, and I'm back in business, don't waste your money with this piece of shit