Stihl 4180 Series Service Manual

Series 4180 Powerhead26
11.1 Special Servicing Tools, Servicing Aids
– Pump – 0000 850 1300
– Nipple – 0000 855 9201
– Screwdriver – 0000 890 2300
– Hose, 135mm – 1110 141 8600
– Screwdriver – 5910 890 2307
– Screwdriver, T10 – 5910 890 2308
– Screwdriver, T8 – 5910 890 2310
– STIHL OH 723 press fluid – 0781 957 9000
11.2 Adjust the Carburetor
11.2.1 Basic setting
N Check the air filter and clean or replace as necessary.
N Check the spark arresting screen (not in all models,
country-specific) in the muffler and clean or replace if
necessary. @ 14.2
N Carefully turn the high speed screw (H) (14) and low
speed screw (L) (13) clockwise down onto their seats.
Carburetor "4180/15x" (models with displacement of 28.4
and 31.4 cc)
N Turn the high speed screw (H) (14) 3 1/2 turns
counterclockwise.
N Turn the low speed screw (L) (13) 1 3/4 turns
counterclockwise.
Carburetor "4180/14x" (models with displacement of 38.3
cc)
N Turn the high speed screw (H) (14) 3 1/2 turns
counterclockwise.
N Turn the low speed screw (L) (13) 1 1/4 turns
counterclockwise.
Adjusting idle speed
Adjust engine speeds with the aid of a tachometer or the
STIHL MDG 1 analyzer.
Unless otherwise specified, adjust engine speeds within a
tolerance of ± 100 rpm.
11 Carburetor
1
2
3
4
5
6
19
37
36
8
27
26
29
30
31
32
33
35
10
40
41
38
39
7
9
1114
13
12
1817
20
21
22
23
25
43
27
28
45
44
24
15
18 42
16
34
0000-GXX-2420-A0
Idle speed: 2,800 rpm

Stihl 4180 Series Specifications

General

Brand	Stihl
Model	4180 Series
Category	Engine
Language	English