HL 91 K (0°)
A professional hedge trimmer with high reach, low-emission engine and 24" blade.
Keep hard-to-reach hedges looking good with the STIHL HL 91 K (0°) extended reach hedge trimmer. Built for professional use, this mid-length hedge trimmer is lightweight and features a fixed-angle, 24" cutting blade. Easy to operate, the HL 91 K (0°) features a powerful, fuel-efficient, low-emission engine. Its compact design provides excellent maneuverability and includes an innovative ergonomic rubberized control handle with ECOSPEED throttle control, allowing for variable speed regulation. This convenient tool is designed to help professionals work longer with reduced fatigue.
| HL 91 K (0°) Specifications - Professional Use | |
| DISPLACEMENT | 24.1 cc (1.5 cu. in.) |
| ENGINE POWER | 0.9 kW (1.2 bhp) |
| WEIGHT | 5.4 kg (11.9 lbs.) |
| FUEL CAPACITY | 540 cc (18.3 oz.) |
| BLADE LENGTH | 60 cm (24 in.) |
| SHAFT LENGTH | 65 cm (26 in.) |
| OVERALL LENGTH | 1,670 mm (65.75 in.) |
| CUTTING ATTACHMENT | 24°/ 0° head |
Important Information
Note: STIHL engine products with the Caring for Nature logo are cleaner than EPA Standards for exhaust emissions.
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.
Model Features
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Reduced-Emission Engine Technology - Caring for Nature
The STIHL Inc. “Caring for Nature” seal identifies its powered products that are more environmentally conscious, producing zero or low exhaust emissions. STIHL Inc. defines “low exhaust emissions” as being cleaner than EPA and/or CARB exhaust emission standards. -
Built in the USA
Indicates products that are built in the United States from domestic and foreign parts and components. -
Loop Handle
The loop handle (R) is an adjustable rounded handle mounted on a shaft for support and control. The handle is designed to help control the machine in different positions, ideal for reaching tough spots. The handle is large enough to accommodate a gloved hand comfortably.
Standard Features
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Common Features for Hedge Trimmers
View the features common to many STIHL hedge trimmers.
You Will Also Need
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HP Ultra 2-Cycle Engine Oil
No matter how you slice it (or trim it or shred it), there’s no better protection for your high performance 2-stroke engine than STIHL HP Ultra. This 2-cycle engine oil has outstanding engine cleaning characteristics, plus “ultra” lubricating qualities that are superior to other 2-cycle engine oils. This fully synthetic oil is also highly biodegradable, degrading by 80% in 21 days. We’re so confident this oil will protect your engine, we’ll double your STIHL limited warranty* when you use it. It’s that good.
*Double your warranty when you purchase either STIHL HP Ultra Oil (six-pack) or STIHL MotoMix® Patented Premixed Fuel (one gallon minimum) with your STIHL product purchase. Double limited warranty protection applies to STIHL gasoline-powered products purchased and registered for personal non-income producing, family and household purposes only. Other restrictions apply. See dealer for details.
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No-Spill® Fuel Containers
No-Spill® fuel containers advance convenience and quality in gasoline-can design by reducing emissions of hydrocarbons from evaporation, permeation and spillage. This helps protect the environment as well as saves you on fuel costs due to waste. Each container is molded from fluorinated, high molecular weight material for low permeation. The thumb-button flow control allows filling even smaller-sized tanks reducing the risk of spilling and is designed to stop the flow automatically when the tank becomes full to prevent overflowing. Built on a wide and stable base for less likelihood of upsets and equipped with child-resistant closures, all No-Spill® containers comply with both EPA and CARB requirements. With 1¼-gallon, 2 ½-gallon and 5-gallon sizes available, you’re sure to find one that fits your needs.
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For Your Safety
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Brush Shield Protector
Cut through your day with the protection and comfort of the STIHL Brush Shield Protector. Developed for users of clearing saws, trimmers and brushcutters, the shield offers face and hearing protection in a lightweight package. The epoxy-coated steel full-face screen helps protect you from flying debris while comfortable, adjustable hearing protectors help reduce loud tool and engine noise.
Noise Reduction Rating (NRR) of 25 dB(A)
NOTE: Goggles or protective glasses meeting ANSI Standard Z87.1 must by worn under face screen and shield for primary eye protection.
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Outdoor PRO Gloves
When you need professional-grade protection for your hands, STIHL Outdoor PRO Gloves deliver it all. High-quality synthetic leather offers comfort and durability. That durability is enhanced further by TPR (thermoplastic rubber)-padded knuckle and finger areas. The gloves are lightweight and offer high dexterity. The material is also breathable for all-day comfort. They’re the PRO way to go.
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Two-Tone Work Glasses
They’re comfortable. They’re functional. They’re from STIHL. Featuring a hollowed-out frame, our Two-Tone Work Glasses are as lightweight as they are stylish. Designed with flexible rubber tips and nose pads, these glasses help you get the job done with greater comfort and fewer slips. Meeting ANSI standard Z87.1+ and offering 99% UV protection, the STIHL Two-Tone Work Glasses will have you covered in more ways than one.
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Product Safety Manual (PDF)
STIHL Limited Warranty
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