- Some stock photographs may show options that are not included. Please check product description.
18-Inch 55.5 cc Gas Chain Saw
- Mfg.#
- MS 291 18
- Sku#
- 3660677
- With dependability and an anti-vibration system, this mid-range chainsaw's fuel-efficient engine increases run time between refuelings by 20% compared to the previous model.
- Bumper Spikes - These spikes prevent pull-in and provide better control, making cutting easier.
- Toolless Fuel and Oil Caps with Retainers - Simply lift the lever and twist the caps to remove or tighten. There’s no need to use a tool to tighten or loosen.
- Pre-Separation Air Filtration System
- Side-Access Chain Tensioner
* Estimated stock levels as of Mon, Mar 9, 2026. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availability of items marked as Limited Stock.
Description
Another high-tech STIHL chainsaw, the MS 291 is built around a fuel-saving engine with long run times and low exhaust emissions. The advanced pre-separation air filtration system perceptibly relieves the downstream filter components, increasing the life of your air filter. Another great comfort feature is an anti-vibration system to provide you with a more comfortable working experience. It is truly a force to be reckoned with.
Not for sale in California.
Specifications
General
| Blade | 18 in. |
|---|---|
| Chain Oil Capacity | 8.12 oz. |
| Chain Pitch | 0.325 in |
| Chain Size | .325 RM3 |
| Chain Type | OILOMATIC® CHAIN |
| Engine | 55.5 cc |
| Engine Power | 3.76 bhp |
| Fuel Capacity | 16.9 oz. |
| Gauge | 0.063 in |
| Power Source | Gas |
| Powerhead Weight | 12.3 lbs. |
| Type | Gas Chain Saw |
Manufacturing Details
The following information is subject to change without notice
| Manufacturer Warranty | 1 Year |
|---|---|
| Prop 65 Warning |
WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
|
| Shop USA | Yes |
Label Information
| Precautionary Statement | CAUTION: The occurrence called “kickback” can cause serious or fatal injury. Always read the instruction manual carefully before using your saw. STIHL uses a green and yellow color-coding system to help you select a powerhead, bar and chain combination that complies with the kickback requirements of ANSI Standard B175.1 (gasoline-powered saws). STIHL recommends the use of green reduced kickback bars and green low kickback chains on all STIHL chainsaws. 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. |
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Videos
Related Documents
Brochure (PDF)
Warranty (PDF)
