Operation Manual
38
English / USA
MS 650, MS 660
: Pull the hand guard back toward 
the front handle:= 
The chain brake is now disengaged 
– your saw is ready for operation.
Always disengage chain brake 
before accelerating engine. High 
revs with the chain brake engaged 
(chain locked) will quickly damage 
the powerhead and chain drive 
(clutch, chain brake).
: Observe safety precautions.
: Always check operation of chain 
lubrication before starting work. 
At very low outside temperatures:
: Allow engine to warm up at part 
throttle
: Change over to winter operation
if necessary -see “Winter 
Operation”.
To shut down the engine: 
: Move Master Control lever to $ 
If fuel tank has been run until dry 
and then refueled:
: Press in decompression valve 
again.
: Pull starter rope several times until 
fuel line is primed.
: Now start the engine.
If the engine doesn’t start:
If you did not move the Master Control 
lever to "Warm Start" n quickly enough 
after the engine began to fire, the 
combustion chamber has flooded.
: Open the twist lock and remove the 
carburetor box cover.
143BA012 KN
137BA008 KN










