The trimmer will include an owners manual.
Discount Details
- The promo code 290240 must be entered on the Shopping Cart page.
- To qualify for this offer, your order subtotal must equal $250 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax, & shipping.
- Promo code not valid on prior purchases or on Honda & Stihl products, and cannot be combined with other promotional offers.
- Valid online and in participating retail stores.
- Limited time offer. Subject to change without notice.
Stihl FS Series Gas-Powered Straight Shaft String Trimmer, 16 1/2in. Cutting Width, 28.4cc, 1.27 HP, Model# FS 91

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Shipping:
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Sold only in stores -
- Simplified 3-step start procedure with built-in pushbutton stop switch that automatically returns to the trimmer to the ìstartî setting
- AutoCut® tap and go cutting head automatically feeds out new line with just a tap on the ground
- Superior air filter system keeps engine clean and running smooth
- Durable cable drive shaft is built to last
- High-strength forged connecting rod for long life
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Description
Key Specs
Reviews
Q & A
Accessories
Warranty
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Product Summary
What's Included
- (1) String trimmer
Features + Benefits
- Simplified 3-step start procedure with built-in pushbutton stop switch that automatically returns to the trimmer to the ìstartî setting
- AutoCut® tap and go cutting head automatically feeds out new line with just a tap on the ground
- Superior air filter system keeps engine clean and running smooth
- Durable cable drive shaft is built to last
- High-strength forged connecting rod for long life
- Smooth, long-lasting 4-bearing gearbox
- Shoulder strap carrying system with support strap helps evenly distribute equipment weight for increased operating comfort and maneuverability
- Adjustable front handle for maximum operating comfort
- Fully-lined drive shaft provides smooth operation and less vibration
- Lightweight, high-tech polymer housing withstands hard impacts and is corrosion resistant
- Protected choke lever/knob helps prevent accidental damage
- Easy access multi-function control handle has start/run/stop controls located right on the handle for comfort and easy task completion without having to remove hands from the handle
- Throttle Trigger interlock system helps prevent accidental activation
- Easy access air filter cover for fast and easy filter cleaning or replacement
- Protected/enclosed control cables eliminate dangling and loose wires
- Heavy-duty steel-on-steel centrifugal clutch is designed to reduce slippage
- Easy-to-change spark plug is protected from the elements
- Spark arrestor muffler features large baffles to reduce noise level and a screen helps reduce the emission of sparks
- Upright, translucent fuel tank for quick, one-glance fuel level checks
- As an authorized STIHL dealer, Northern Tool + Equipment provides in-store service and warranty support for STIHL gas-powered equipment shipped directly to you. For return inquiries, please contact Customer Care for assistance.
Key Specs
| Attribute | Specification |
|---|---|
item# | 63942 |
Brand | Stihl |
Manufacturer's Warranty | 2 year limited warranty |
Ship Weight | 18.7 LB |
Product Type | Trimmers |
Primary Power Source | Gas |
Max. Cutting Width | 16.5 in |
Cutting Width (in.) | 16 1/2 |
Displacement (cc) | 28.4 |
| Attribute | Specification |
|---|---|
Fuel Tank Capacity (qt.) | 0.75 |
Engine Displacement | 28.4 cc |
Fuel Tank Capacity | 0.75 qt |
Cordless | Yes |
Horsepower | 1.27 HP |
Line Diameter | 0.095 in |
Shaft Type | Straight |
Tool Weight | 12.1 |
Reviews
Questions & Answers
Questions
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· 4 months ago
Does a manual come with it?
1 answer-
ProductExpert11· 4 months ago
Helpful?
-
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· 7 months ago
What brush blade can I use
1 answer-
ProductExpert30· 7 months ago
The recommended brush blade is part number 64088.
Helpful?
-
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· 11 months ago
Does the string trimmer use regular unleaded gas?
1 answer-
ProductExpert11· 11 months ago
The FS 91 is a 4-Mix engine requiring a 50:1 gas to oil mixture. It is recommended to use the Stihl Motomix 50:1 fuel mix.
Helpful?
-
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· 5 years ago
This Item include the chest arness?
1 answer-
ProductExpert11· 5 years ago
Shoulder strap/carrying system is included with the cutter.
Helpful?
-
Warranty
Manufacturer's Warranty
2 year limited warranty
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Replacement Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
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Specifications
Trimmers
Multi-task tool
Trimmers
Brush Cutter
Gas
Battery
Gas
Gas
16.5 in
-
16 in
26 in
16 1/2
-
16
26
28.4
-
25
389
0.75
-
0.27
-
28.4 cc
-
25 cc
389 cc
0.75 qt
-
0.27 qt
-
Yes
Yes
Yes
Yes
1.27 HP
-
-
13 HP
0.095 in
-
0.095 in
-
Straight
Adjustable
Straight
-
12.1
7.5
10.5 (dry weight)
395
-
-
14.0000 lb
-
-
-
36.0 x 10.625 x 11.625 in
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-
-
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16/6.5 x 8 pneumatic bar lug



