Stihl MS 271 Manual

6 MS 271 C, MS 291 C
2.5 Tightening Torques
DG and P (Plastoform) screws are used in polymer and light metal components. These screws form a
permanent thread when they are installed for the first time. They can be removed and installed as often as
necessary without impairing the strength of the screwed assembly, providing the specified tightening torque is
observed.
For this reason it is essential to use a torque wrench.
Fastener Thread size For component Torque
Nm
Remarks
Screw P 4x12 Cover plate/chain sprocket cover 2.5 B
Screw P 4x12 Chain tensioner cover/engine housing 1.5
Screw P 4x14 Antivibration spring/engine housing 2.0
Screw P 5x16 Antivibration spring/tank housing 3.0
Screw P 4x12 Brake band/engine housing 2.0
Screw P 4x10 Brake cable retainer/ tank housing 2.0 Q
Collar screw M 8 Collar screw/collar bushing 30.0 1)
Collar screw M 8/M 10 Collar stud for bar / engine housing 16.0 3)
Collar screw M 8/ D 8 Collar screw/engine housing 16.0 B
Collar screw M 8/ D 9 Collar stud for bar / engine housing
(repair solution)
16.0
Screw P 4x12 Cover, chain brake / engine housing 1.5
Screw M 4x9.6 Spark arresting screen/muffler 1.0
Screw P 6x32.5 Handlebar/tank housing 7.0
Screw P 5x20 Hand guard/fan housing/engine housing 4.0
Screw M 5x20 Hand guard/fan housing/engine housing 8.0
Screw M 5x14 Shroud / engine housing 5.0
Screw P 6x28 Chain catcher/engine housing/bearing plug 6.0
Screw P 5x20 Spiked bumper / engine housing, top 4.0
Screw P 5x20 Spiked bumper / engine housing, bottom 4.0
Screw M 4x12 Manifold/cylinder 3.0 2)
Screw D 5x18 Bearing plug/cylinder 9.0 2)
Screw P 5x20 Fan housing / engine housing 4.0
Screw P 4x12 Air baffle / engine housing 2.0
Carrier M 12x1 L Carrier / crankshaft 50.0
Screw D 4x18 Oil pump/engine pan 4.0 2)
Screw D 5x18 Muffler / cylinder 9.0 2)
Nut M 8x1 Flywheel/crankshaft 28.0 4)
Screw P 4x12 Side plate/engine housing 2.0
Collar nut M 5 Carburetor / collar screw, 1st stage, fan side 2.0
Collar nut M 5 Carburetor / collar screw, 2nd stage, sprocket
side
3.5
Collar nut M 5 Carburetor / collar screw, 3rd stage, fan side 3.5

Stihl MS 271 Specifications

General

Motor type	2-stroke motor
Chain gauge	1.6 mm
Chain pitch	3/8 \
Blade length	400 mm
Automatic oiling	Yes
Oil tank capacity	0.24 L
Fuel tank capacity	0.5 L
Engine displacement	55.5 cm³
Engine power	3.8 hp
Power source	Gasoline

Weight and Dimensions

Weight	5600 g