Stihl MS 650

29MS 650, MS 660
: Remove the gasket (1).
– Clean the sealing faces.
– Inspect the heat reflecting foil and
replace if necessary – b 6.7.2
Installing
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2
1
3
: Install a new gasket (2) with its
bead (3) pointing outward.
– Coat threads of screws with
Loctite – b 17
– Fit the bottom casing.
– Tighten down the screws firmly –
b 3.5
– Note different sizes of mounting
screws when fitting top casing:
Lower mounting screws are
M6x20 and the upper mounting
are M5x6.
– Fit the top casing.
– Tighten down the screws firmly –
b 3.5
– Unscrew the spark plug – b 5.4
: Take out the screws (arrows).
: Lift the shroud (1) away vertically.
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1
– Before fitting the shroud, check
that the cover (arrow) is properly
seated on the decompression
valve.
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– Before fitting the shroud, check
that cap (arrow) is properly
seated.
Always replace damaged caps and
grommets in sets.
– Fit the shroud and tighten down
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the screws firmly – b 3.5
6.2 Shroud