Main Parts; Specifications - Stihl MS 231 Instruction Manual

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31 Main Parts

13
7
14
1
18
17
20
1
16
15
1 Shroud lock
2 Carburetor adjusting screws
3 Fuel pump
1)
4 Shutter (summer and winter operation)
5 Chain brake
6 Chain sprocket
7 Chain sprocket cover
8 Chain catcher
9 Side chain tensioner
10 Spiked bumper
11 Guide bar
12 Oilomatic chain
13 Adjusting wheel
1)
14 Handle of wingnut
15 Oil filler cap
16 Muffler
17 Front hand guard
18 Front handle (handlebar)
19 Spark plug boot
20 Starter grip
1)
Depending on model
1)
to ISO 11681 +/- 50 rpm
40
3
2
#
4
5
10
6
9
7
8
19
1
22
24
21
23
26
1)
(quick chain adjuster)
1)
(quick chain adjuster)
21 Fuel filler cap
22 Master Control lever
23 Throttle trigger
24 Throttle trigger lockout
25 Rear handle
26 Rear hand guard
# Serial number
11

32 Specifications

12
32.1 Engine
STIHL single cylinder two-stroke engine
32.1.1 MS 231, MS 231 C
Displacement:
Bore:
Stroke:
25
Engine power to ISO 7293: 2.0 kW (2.7 bhp) at
Idle speed:
32.1.2 MS 251, MS 251 C
Displacement:
Bore:
Stroke:
Engine power to ISO 7293: 2.2 kW (3.0 bhp) at
Idle speed:
32.2 Ignition System
Electronic magneto ignition
Spark plug (resistor
type):
Electrode gap:
32.3 Fuel System
All position diaphragm carburetor with integral
fuel pump
Fuel tank capacity:
32.4 Chain Lubrication
Fully automatic, speed-controlled oil pump with
rotary piston
Oil tank capacity:
42.6 cc
42.5 mm
30 mm
10,000 rpm
2,800 rpm
1)
45.6 cc
44 mm
30 mm
10,000 rpm
2,800 rpm
1)
NGK CMR6H,
BOSCH USR 4 AC
0.5 mm
390 cc (0.39 l)
200 cc (0.2 l)
0458-737-8321-C
31 Main Parts