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The following maintenance intervals apply to normal usage and operating conditions. If your daily
working time is longer or operating conditions are difficult (very dusty work area, resin-rich wood, trop-
ical wood, etc.), shorten the specified intervals accordingly. If you only use your power tool
occasionally, extend the intervals accordingly.
Antivibration elements
Air inlet on fan housing
Cylinder fins
Carburetor
Spark plug
All accessible screws and nuts (not adjusting
screws)
Chain catcher
Exhaust port
Safety labels
1)
STIHL recommends a STIHL servicing dealer
2)
Firmly tighten down the cylinder base screws of professional saws (3.4 kW or more) after 10 to 20 hours of operation.
MS 651
Check
1)
Have replaced by servicing dealer
Clean
Clean
Check idle adjustment – chain must not rotate
Adjust idle speed; if necessary, have saw ser-
1)
viced or repaired by dealer
Readjust electrode gap
Replace after every 100 hours of operation
2)
Retighten
Check
Replace
Decoke after first 139 hours of operation, then
every 150 hours of operation
Replace
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