WhichPartFits.com

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.

See also: MS 261, MS 291 — parts are often interchangeable within this family.

Spark Plug

OEM0000 400 7000(0.5mm gap)

Air Filter

OEM1141 120 1600Fleece filter; HD2 style 1141 140 4400 also fits
BrandPart #
Stens605-205Buy on Amazon →

Fuel Filter

OEM0000 350 3518Orange in-tank pickup body fuel filter
BrandPart #

Carburetor

OEM1141 120 0612Walbro HDA-226; also fits MS 291
BrandPart #
WalbroHDA-226Buy on Amazon →

Recoil Starter

OEM1141 080 1801Fits MS 261, MS 271, MS 291
BrandPart #
Stens150-604Buy on Amazon →

Ignition Coil

OEM1141 400 1300Fits MS 261, MS 271, MS 291
BrandPart #
Stens610-900Buy on Amazon →

Primer Bulb

OEM4238 350 6201Newer units (SN# 287332321+) use 0000 350 6202

Fuel Line Kit

OEM1141 358 7708Includes fuel pickup line and return line; fits MS261, MS271, MS291
BrandPart #
Stens115-128Buy on Amazon →

Chain

OEM(20", .325" pitch, .050" gauge, 81 drive links)Stock bar length (Farm Boss); verify drive link count matches your bar
BrandPart #
OregonV81Buy on Amazon →

Guide Bar

OEM(20", .325" pitch, .050" gauge)