Chainsaw
Stihl MS 271
2-Stroke
The Stihl MS 271 is a 50.2cc <!-- verify: stihlusa.com --> 2-stroke chainsaw sold under Stihl's Farm Boss brand, targeted at farmers, ranchers, and rural property owners who need a capable daily-use workhorse. It handles 18" to 20" guide bars and sits between the homeowner MS 251 and professional MS 361 in power and build quality. The MS 271 runs a Zama carburetor and shares many service parts with the MS 261. The rugged design prioritizes serviceability — spark plug, air filter, and fuel system access are straightforward for on-farm maintenance.
Spark Plug
OEM0000 400 7000(0.5mm gap)
| Brand | Part # | |
|---|---|---|
| NGK | BPMR7A | Buy on Amazon → |
| Champion | RCJ6Y | Buy on Amazon → |
Air Filter
OEM1141 120 1600Fleece filter; HD2 style 1141 140 4400 also fits
| Brand | Part # | |
|---|---|---|
| Stens | 605-205 | Buy on Amazon → |
Fuel Filter
OEM0000 350 3518Orange in-tank pickup body fuel filter
| Brand | Part # |
|---|
Carburetor
OEM1141 120 0612Walbro HDA-226; also fits MS 291
| Brand | Part # | |
|---|---|---|
| Walbro | HDA-226 | Buy on Amazon → |
Recoil Starter
OEM1141 080 1801Fits MS 261, MS 271, MS 291
| Brand | Part # | |
|---|---|---|
| Stens | 150-604 | Buy on Amazon → |
Ignition Coil
OEM1141 400 1300Fits MS 261, MS 271, MS 291
| Brand | Part # | |
|---|---|---|
| Stens | 610-900 | Buy on Amazon → |
Primer Bulb
OEM4238 350 6201Newer units (SN# 287332321+) use 0000 350 6202
| Brand | Part # | |
|---|---|---|
| Zama | BG-00-4 | Buy on Amazon → |
| Hipa | G002-H | Buy on Amazon → |
Fuel Line Kit
OEM1141 358 7708Includes fuel pickup line and return line; fits MS261, MS271, MS291
| Brand | Part # | |
|---|---|---|
| Stens | 115-128 | Buy on Amazon → |
Chain
OEM(20", .325" pitch, .050" gauge, 81 drive links)Stock bar length (Farm Boss); verify drive link count matches your bar
| Brand | Part # | |
|---|---|---|
| Oregon | V81 | Buy on Amazon → |
Guide Bar
OEM(20", .325" pitch, .050" gauge)
| Brand | Part # | |
|---|---|---|
| Oregon | 203VXLGD025 | Buy on Amazon → |