Stihl BT 45 Manual

1BT 45
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© ANDREAS STIHL AG & Co. KG, 2009
Contents
1. Introduction 2
2. Safety Precautions 3
3. Specifications 4
3.1 Fuel System 4
3.2 Gearbox 4
3.3 Tightening Torques 5
4. Troubleshooting 7
4.1 Clutch 7
4.2 Rewind Starter 8
4.3 Fuel System 9
4.4 Engine 11
5. Shroud/Housing
Parts 12
5.1 Handle Housing 12
5.2 Clutch 13
5.2.1 Engine 14
5.3 Muffler/Spark
Arresting Screen 14
6. Rewind Starter 15
6.1 General 15
6.2 Removing and
Installing 15
6.3 Starter Cup 16
6.3.1 Rope Rotor 16
6.4 Replacing the
Rewind Spring 17
6.4.1 Tensioning the Rewind
Spring 18
6.5 Starter Rope 18
6.6 Starter Rope
Guide Bush 19
6.7 Pawl 20
7. Throttle Control 20
7.1 Throttle Trigger 20
7.2 Replacing the Throttle
Cable 21
7.3 Stop Switch 21
8. Fuel System 22
8.1 Air Filter 22
8.1.1 Removing and
Installing 22
8.1.2 Choke Shutter 22
8.2 Carburetor 23
8.2.1 Leakage Test 23
8.2.2 Removing and
Installing the
Carburetor 24
8.3 Spacer Flange 25
8.4 Servicing 25
8.4.1 Manual Fuel Pump 25
8.4.2 Metering Diaphragm 26
8.4.3 Inlet Needle 27
8.4.4 Fixed Jet 27
8.4.5 Pump Diaphragm
and Fuel Strainer 28
8.4.6 Adjusting 28
8.4.7 Basic Setting 30
8.5 Tank Vent 30
8.5.1 General 30
8.5.2 Replacing 31
8.6 Fuel Tank 31
8.6.1 Pickup Body 31
8.6.2 Hoses 32
9. Gearbox 32
9.1 Removing and
Installing 32
9.2 Diassembling and
Assembling 33
10. Special Servicing
Tools 40
11. Service Accessories 41

Stihl BT 45 Specifications

General

Engine Type	2-stroke
Displacement	27.2 cc
Power Output	0.9 kW (1.2 hp)
Weight	5.2 kg
Power Source	Gasoline
No-Load Speed	0 - 300 rpm