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© ANDREAS STIHL AG & Co. KG, 2018
RA_014_2018_01_01. VA0.F18.
0000008149_003_GB
BR 800 1
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This service manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process with electronic
systems.
Contents
1 About this Service Manual 3
1.1 Applicable Documentation 3
1.2 Symbols in Text 3
2 Safety During Repair Work 3
2.1 Protective Gloves 3
2.2 Safety Glasses 3
2.3 Spare Parts 3
3 Preparations for Repair 3
3.1 Preparing the Blower 3
4 Troubleshooting 4
4.1 Blower wheel runs while engine is idling: 4
4.2 Starter rope does not rewind 4
4.3 Starter rope cannot be pulled out far enough 4
4.4 Starter rope can be pulled out almost without
resistance (crankshaft does not turn) 4
4.5 Starter rope is difficult to pull or rewinds very
slowly 5
4.6 Engine does not run or runs erratically, with
misfiring and sporadic loss of power 5
4.7 Engine will not idle, idle speed too high 6
4.8 Engine stops when throttle trigger is released 6
4.9 Engine does not start easily, stalls at idle
speed, but operates normally at full throttle 7
4.10 Engine does not deliver full power or runs
erratically 7
4.11 Engine does not start. 8
4.12 Engine speed drops quickly under load – low
power 8
4.13 No spark 9
4.14 Engine stops suddenly 10
4.15 Engine does not reach maximum RPM. 11
5 Harness 12
5.1 Tools, Servicing Aids 12
5.2 Removing the Harness 12
5.3 Fitting the Harness 13
5.4 Removing the Backplate Extension 13
5.5 Fitting the Backplate Extension 13
6 Rewind Starter 14
6.1 Tools, Servicing Aids 14
6.2 Removing the Rewind Starter 14
6.3 Removing the Bearing Shell 14
6.4 Relieving Tension of Rewind Spring 14
6.5 Removing the Spring Housing 14
6.6 Removing the Rewind Spring 15
6.7 Removing the Starter Rope 15
6.8 Installing the Starter Rope 15
6.9 Installing the Rewind Spring 15
6.10 Installing the Rope Rotor 16
6.11 Installing the Spring Housing 16
6.12 Tensioning the Rewind Spring. 17
6.13 Installing the Bearing Shell 17
6.14 Installing the Rewind Starter 18
6.15 Removing the Stop Buffers 18
6.16 Installing the Stop Buffers 18
7 Air Filter, Shroud 19
7.1 Tools, Servicing Aids 19
7.2 Removing the Air Filter 19
7.3 Installing the Air Filter 19
7.4 Removing the Shroud 19
7.5 Installing the Shroud 19
8 Filter Housing, Carburetor, Fuel Pump 20
8.1 Tools, Servicing Aids 20
8.2 Removing Filter Housing and Carburetor 20
8.3 Installing Filter Housing and Carburetor 20
8.4 Removing the Fuel Pump 21
8.5 Installing the Fuel Pump 22
8.6 Removing the Baffle 22
8.7 Installing the Baffle 22
9Carburetor 23
9.1 Special Servicing Tools, Servicing Aids 23
9.2 Testing Carburetor for Leaks 23
9.3 Disassembling the Carburetor 24
9.4 Assembling the Carburetor 25
9.5 Adjusting the Carburetor 27
10 Backplate, Tank Housing 29
10.1 Tools, Servicing Aids 29
10.2 Removing Pickup Body from Fuel Tank 29
10.3 Installing Pickup Body in Fuel Tank 29
10.4 Testing the Tank Vent 29
10.5 Removing the Fuel Tank 30
10.6 Installing the Fuel Tank 30
10.7 Removing the Tank Vent 30
10.8 Installing the Tank Vent 30
10.9 Removing the Backplate 30
10.10 Removing the Protective Screen 30
10.11 Fitting the Protective Screen 31
10.12 Installing the Backplate 31
11 Antivibration Elements 32
11.1 Tools, Servicing Aids 32
11.2 Removing the Antivibration Elements 32
11.3 Installing the Antivibration Elements 32
11.4 Removing the Stop Buffer 32
11.5 Installing the Stop Buffer 33
12 Adjusting Valve Clearance 34
12.1 Tools, Servicing Aids 34
12.2 Checking, Adjusting Valve Clearance 34
13 Ignition System 36
13.1 Special Servicing Tools, Servicing Aids 36
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General
Weight and Dimensions
