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Specifications

EPA / CEPA

The Emission Compliance Period referred to on the Emissions Compliance Label indicates the number of operating hours for which the engine has been shown to meet Federal emission requirements.

Category

A = 300 hours

B = 125 hours

C = 50 hours

Engine

STIHL single cylinder two-stroke engine

Displacement:

4.31 cu. in.

 

(70.7 cm3)

Bore:

1.97 in. (50 mm)

Stroke:

1.41 in. (36 mm)

Engine power to

5.6 hp (4.2 kW)

ISO 7293:

at 9,500 rpm

Idle speed:

2,800 rpm

Maximum permissi-

 

ble speed with bar

 

and chain:

13,500 rpm

Ignition system

 

Electronic magneto ignition

(breakerless)

 

Spark plug

NGK BPMR 7 A,

(suppressed):

Bosch WSR 6 F

Electrode gap:

0.02 in. (0.5 mm)

52

 

Fuel system

All position diaphragm carburetor with integral fuel pump

Fuel tank capacity: 24.5 oz (0.725 l)

Chain lubrication

Fully automatic, speed-controlled oil pump with reciprocating piston – additional manual oil flow control

Oil tank capacity:

12.2 fl.oz (0.36 l)

Weight

 

dry, without bar and chain

MS 441:

14.6 lbs. (6.6 kg)

MS 441 with wrap

 

around handlebar:

15.4 lbs. (7.0 kg)

Cutting attachment

Recommended cutting attachments in compliance with Sec. 5.11 of ANSI standard B 175.1-2000

Observe the information about ANSI standard B 175.1-2000 as well as the definition "low-kickback saw chain" in the section "Safety Precautions and Working Techniques".

Rollomatic E guide bars

STIHL reduced kickback guide bars (with green label)

Bar lengths:

16, 18, 20, 25 in

 

(40, 45, 50, 63 cm)

Pitch:

3/8" (9.32 mm)

Groove width:

0.050 in. (1.3 mm)

 

or 0.063 in.

 

(1.6 mm)

Sprocket nose:

10-tooth

Saw chains 3/8"

STIHL reduced kickback saw chains (with green label)

Rapid Super C3 (33 RSC3) Rapid Super C3 (36 RSC3)

Pitch:

3/8" (9.32 mm)

Drive link gauge:

0.050 in. (1.3 mm)

 

or 0.063 in.

 

(1.6 mm)

Chain sprocket

7-tooth for 3/8" (rim sprocket)

In order to comply with the kickback performance requirements of Sec. 5.11 of ANSI standard B 175.1-2000, do not use replacement saw chains unless they have been designated as meeting the ANSI Sec. 5.11 requirements on this specific powerhead, or have been designated as "low kickback" saw chains in accordance with the ANSI B 175.1-2000 standard.

Since new bar/chain combinations may be developed after publication of this Manual, ask your STIHL dealer for the latest STIHL recommendations.

MS 441 C-M