Stihl BR 550 Technical Guide - Page 16

Technical Information, Set valve clearance, slight suction, twice, Assembly, arrows - ignition coil

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Page 16 5.4.5 Set valve clearance Technical Information 08.2005 5.4.6 Assembly Use the gaskets in kit 4282 007 1001 "Parts for adjusting valve clearance". . Insert setting gauge (1) between rocker arm and valve stem Depending on the momentary valve clearance: . Turn nut (2) clockwise to reduce the valve clearance or anticlockwise to increase it - the setting gauge must produce a slight suction effect when it is pulled through . Rotate the crankshaft twice until the tip of the flywheel is flush with the ignition coil. . Check the valve clearance again and re-adjust if necessary . Fit gasket (1) in position (arrows) . Fit valve cover and tighten screw with a torque of 6 Nm . Mount the air guide shroud . Screw in spark plug, fit shroud, and plug in spark plug boot . Fit starter cover and tighten down screws . Start engine and let it warm up . Switch off engine . Check engine does not leak TI_08_2005_11_01_02.fm

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Page 16
Technical Information
08.2005
TI_08_2005_11_01_02.fm
5.4.5
Set valve clearance
.
Insert setting gauge (
1
) between rocker arm and
valve stem
Depending on the momentary valve clearance:
.
Turn nut (
2
) clockwise to reduce the valve
clearance or anticlockwise to increase it – the
setting gauge must produce a
slight suction
effect when it is pulled through
.
Rotate the crankshaft
twice
until the tip of the
flywheel is flush with the ignition coil.
.
Check the valve clearance again and re-adjust if
necessary
5.4.6
Assembly
Use the gaskets in kit 4282 007 1001 "Parts for
adjusting valve clearance".
.
Fit gasket (
1
) in position (
arrows
)
.
Fit valve cover and tighten screw with a torque
of 6 Nm
.
Mount the air guide shroud
.
Screw in spark plug, fit shroud, and plug in spark
plug boot
.
Fit starter cover and tighten down screws
.
Start engine and let it warm up
.
Switch off engine
.
Check engine does not leak