MS 650, MS 660
English
29
Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
Basic information
The carburetor comes from the factory
with a standard setting.
The carburetor has been adjusted for
optimum performance and fuel
efficiency in all operating states.
The high speed screw alters the
engine’s power output and the maximum
off-load engine speed.
Standard setting
N Switch off engine
N Check the air filter – clean or
replace it if necessary.
N Check the spark arresting screen in
the muffler (present only in some
countries) – clean or replace it if
necessary
Carburetors with H = 1 and L = 1
N Carefully turn both adjusting screws
clockwise until they are seated
firmly (clockwise)
N Turn the high speed screw (H) 1 full
turn counterclockwise
N Turn the low speed screw (L) 1 full
turn counterclockwise
Carburetor with H = 3/4 and L = 1/4
N Turn the high speed screw (H)
counterclockwise as far as possible
(max. 3/4 turn)
N Carefully turn the low speed
screw (L) clockwise – as far as
possible – then back off 1/4 turn.
Engine Management Adjusting the Carburetor
If you make the setting too lean it
will increase the risk of engine
damage through lack of
lubrication and overheating.
To Next Page
Loading...
