MM 55 STIHL YARD BOSS® - $349.95 DSRP
Using a universal power train, this cultivator can transition into other useful tools for around the home or farm.
There are not too many things a STIHL YARD BOSS® can't handle. One of two great multi-task yard care systems, the lightweight and powerful MM 55 C-E STIHL HomeScaper Series™ YARD BOSS® offers the same versatility as the MM 55 but features the Easy2Start™ system. With a pick tine cultivator set included as standard, this system is also available with an optional weight kit — helping the tines more ...Read More

Model Features
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Built in the USA
Indicates products that are built in the United States from domestic and foreign parts and components. -
Purge Pump Primer
A small fuel pump delivers fuel to the carburetor when pushed, reducing the number of starting strokes required following extended breaks in operation. -
Compact Design
The folding handles and front hand grip make the YARD BOSS® compact and easy to transport and store.
See it in action! -
Multi-Tasking Tool
Switch between any of the eight YARD BOSS® optional attachments quickly.
See it in action! -
Multi-Function Control Handle
Having easy access to all of the controls on one comfortable handle makes it easy to complete tasks so the operator’s hand never has to leave the handle. -
Protected Spark Plug Cover
The spark plug cap is integrated in the equipment’s housing, so the spark plug remains protected while still being easy to change.
Important Information
Note: STIHL recommends use of fuel with no more than 10% Ethanol content. Using fuel with greater than 10% Ethanol content may cause damage to your equipment and may void your STIHL warranty. Learn More…
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
STIHL products sold through U.S. STIHL Dealers are for distribution in the United States only.
We Also Suggest
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FS-MM Trimmer Attachment
Now you can turn your STIHL YARD BOSS® into a quality wheeled trimmer, adding ease and convenience to your trimming tasks – all for much less than the cost of a dedicated trimmer mower. The STIHL FS-MM trimmer attachment features a dependable STIHL AutoCut® 25-2 trimmer head for precision cutting tasks. To advance the line, just tap the trimmer head against the ground. Need to change the trimmer head? The FS-MM trimmer head is designed to be removed and replaced with a wide range of STIHL trimmer heads, including STIHL SuperCut™, FixCut™, DuroCut and more!
Note: Must be used with wheel kit. -
HP Ultra 2-Cycle Engine Oil
HP Ultra is a fully synthetic 2-cycle engine oil specially suited for high performance chainsaws and power tools. This oil has outstanding engine cleaning characteristics, plus “ultra” superior lubricating qualities in comparison to other 2-cycle engine oils. It is ideal for use in STIHL 4-MIX® engines. This oil is biodegradable, degrading by 80% in 21 days.•2.6 oz. bottle makes 1 gallon mix
•5.2 oz. bottle makes 2 gallon mix
•6.4 oz. bottle makes 2 1/2 gallon mix
•12.8 oz. bottle makes 5 gallon mix
STIHL recommends a mix of 50:1 high-quality 89 octane or higher unleaded gasoline to STIHL engine oil. This same mix ratio should be used during break-in. -
KW-MM STIHL PowerSweep™ Attachment
Heavy-duty rubber flaps clean up compacted dirt on roads and sidewalks, moves pebbles and sand from grassy turf, and even removes water and light snow from hard surfaces.
Note: This attachment must be used with large deflector and extensions. -
FC-MM Bed Edger Attachment
Used to cut a defined or distinct edge to separate the grass lawn from the cultivated soil in a planting area.
For Your Safety
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GSX Glasses
STIHL GSX Protective Glasses feature adjustable temples allowing a customized fit and a soft nose pad that offers comfort that lasts all day. Polycarbonate glasses with impact-resistant lens provide 99% UV protection. -
Work Gloves
Double palm layer and finger tips provide long life. Breathable polyester back and knit wrist provide snug fit. One size fits most. -
STIHL® Pro Mark™ Hearing Protector
Padded stainless steel spring wire headband maintains constant pressure. Easy to adjust. Noise Reduction Rating (NRR): 29. Meets ANSI S3.19-1974 standard.
Colors available: Camouflage, Orange and Grey
MM 55 STIHL YARD BOSS® is rated out of 5 by 63.
Rated 5 out of 5 by Sanders from Yard boss 55 Good pricing, works the ground very well, however get the bolo tines they do the job better than the ones that come on it. Scott from straubs equipment very nice and knows his products.
Date published: 2018-03-26
Rated 4 out of 5 by Machineman88 from Useful tool Got this to prepare planting beds and use the power sweep attachment as well. Does the job as expected. Sometimes hard to start, as is my Stihl chainsaw. Once running it's fine. Useful machine once I got past the upfront cost to own.
Date published: 2017-10-25
Rated 5 out of 5 by Caseman from Great tool!! Unit works as designed, really makes weeding the garden a simple task
Date published: 2017-10-16
Rated 5 out of 5 by StihlUserMK from Great machine I enjoy using this machine, it's a great multi tool. I have edged and tilled and both attachments work great. I sedentary recommend this product. Very maneuverable and a handy tool.
Date published: 2017-09-23
Rated 4 out of 5 by Relidnit from Small tiller for weeding and defining beds I've owned a MM55C for a few years and it's good for weeding beds, enlarging small beds, cutting curves and getting into tight spaces.Pro:LighweightRemovable tinesEasy to cleanDecent powerStarts easily IF you do the proper post season maintenanceVersatile - can be run with 2,3 or 4 tinesFolds up neatly and fits into most car trunks with easeCon:NEEDS A MUD FLAP! I added one because this unit throws dirt all over your feet at full power without a mud flap.Be SURE to run the fuel tank dry before storage and avoid gas/ethanol mixtures. Even 10% ethanol in gas will cause the carb on this unit to foul. I replaced the carb and it ran like new. Took the old one apart and it was totally green inside even with the use of Stabil ethanol stabilizer.
Date published: 2017-07-28
Rated 5 out of 5 by Mitzie from Awesome I love my Yard Boss. I have had it for years. I am under 5' tall and it is just perfect for me.Dependable, powerful, easy to handle.
Date published: 2017-07-27
Rated 5 out of 5 by Kassie from Excellent Yard Tool We too have one of these Stihl Yard Bosses. I just love this tool. I LOVE ALL MY STIHL products.
Date published: 2017-06-26
Rated 4 out of 5 by KLB311 from Nice Machine We really love this machine overall. My wife has used it more than myself so she should be writing this. We use this Stihl MS 55 for our garden tilling after we've planted. Excellent chewing up the ground making for easy weed pulling. The only issue at all is it is a little bit tiring after about 30 to 40 minutes of work. We use the wheels to help adjust for depth control and they work great. It's also nice when you stop tilling to just let the unit rest on the adjustable wheel stand!
Date published: 2017-05-27