Stihl BR 800 - Service Manual

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2018-06

STIHL BR 800

Service Manual

Table of Contents

Default Chapter3
- Table of Contents3
1 About this Service Manual5
- Applicable Documentation5
- Symbols in Text5
2 Safety During Repair Work5
- Protective Gloves5
- Safety Glasses5
- Spare Parts5
3 Preparations for Repair5
- Preparing the Blower5
4 Troubleshooting6
- Blower Wheel Runs While Engine Is Idling6
- Starter Rope Does Not Rewind6
- Starter Rope Cannot be Pulled out Far Enough6
- Starter Rope Can be Pulled out Almost Without6
  - Resistance (Crankshaft Does Not Turn)6
- Starter Rope Is Difficult to Pull or Rewinds very7
- Engine Does Not Run or Runs Erratically, with7
  - Misfiring and Sporadic Loss of Power7
- Engine will Not Idle, Idle Speed too High8
- Engine Stops When Throttle Trigger Is Released8
- Engine Does Not Start Easily, Stalls at Idle9
- Engine Does Not Deliver Full Power or Runs9
- Engine Speed Drops Quickly under Load - Low10
- No Spark11
- Engine Does Not Start12
- Engine Stops Suddenly12
- Engine Does Not Reach Maximum RPM13
5 Harness14
- Tools, Servicing Aids14
- Removing the Harness14
- Fitting the Harness15
- Removing the Backplate Extension15
- Fitting the Backplate Extension15
6 Rewind Starter16
- Tools, Servicing Aids16
- Removing the Bearing Shell16
- Relieving Tension of Rewind Spring16
- Removing the Spring Housing16
- Removing the Rewind Spring17
- Removing the Starter Rope17
- 12 6.8 Installing the Starter Rope17
- Installing the Rewind Spring17
- Installing the Rope Rotor18
- Installing the Spring Housing18
- Tensioning the Rewind Spring19
- Installing the Stop Buffers20
7 Air Filter, Shroud21
- Tools, Servicing Aids21
- Removing the Air Filter21
- Installing the Air Filter21
- Removing the Shroud21
- Installing the Shroud21
8 Filter Housing, Carburetor, Fuel Pump22
- Tools, Servicing Aids22
- Removing Filter Housing and Carburetor22
- Installing Filter Housing and Carburetor22
- Removing the Fuel Pump23
- Installing the Fuel Pump24
- Removing the Baffle24
  - Installing the Baffle24
9 Carburetor25
- Special Servicing Tools, Servicing Aids25
- Testing Carburetor for Leaks25
- Disassembling the Carburetor26
- Assembling the Carburetor27
- Adjusting the Carburetor29
  - 10 Backplate, Tank Housing31
  - Tools, Servicing Aids31
10 Backplate, Tank Housing31
- Removing Pickup Body from Fuel Tank31
- 10.10 Removing the Protective Screen32
- 10.11 Fitting the Protective Screen33
- 10.12 Installing the Backplate33
11 Antivibration Elements34
- Tools, Servicing Aids34
12 Adjusting Valve Clearance36
- Tools, Servicing Aids36
- Checking, Adjusting Valve Clearance36
13 Ignition System38
- Special Servicing Tools, Servicing Aids38
- Testing the Ignition System38
- Removing the Flywheel39
- Installing the Flywheel39
- Removing the Ignition Module40
- Disassembling the Spark Plug Boot40
- Assembling the Spark Plug Boot40
- Installing the Ignition Module40
14 Airflow Shroud, Impulse Hose, Manifold41
- Tools, Servicing Aids41
- Removing the Airflow Shroud41
- Installing the Airflow Shroud41
- Removing the Impulse Hose42
- Installing the Impulse Hose42
- Removing the Manifold42
- Installing the Manifold42
15 Control Handle43
- Special Servicing Tools, Servicing Aids43
- Removing the Control Handle43
- Fitting the Control Handle43
- Removing the Clamp45
- Installing the Clamp45
- Removing the Throttle Cable45
- Installing the Throttle Cable45
16 Muffler46
- Tools, Servicing Aids46
- Removing the Muffler46
- Installing the Muffler46
- Removing the Scoop and Spark Arrestor46
- Installing the Scoop and Spark Arrestor46
17 Blower Assembly47
- Tools, Servicing Aids47
- Removing the Stop Buffer47
- Installing the Stop Buffer47
- Removing Outer Blower Housing and Elbow47
- Removing the Blower Wheel47
- Removing the Inner Blower Housing48
- Installing the Inner Blower Housing48
- Installing the Blower Wheel48
- Installing Outer Blower Housing and Elbow48
18 Valve Gear49
- Tools, Servicing Aids49
- Removing Rocker Arms and Pushrods49
- Removing Cam Followers and Cam Gear50
- Checking Decompression System50
- Installing Cam Followers and Cam Gear50
- Installing Rocker Arms and Pushrods50
19 Testing Engine for Leaks52
- Tools, Servicing Aids52
- Testing Compression Pressure52
20 Crankcase, Crankshaft, Oil Seals54
- Tools, Servicing Aids54
- Removing the Collar Studs54

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