English / USA

Adjustment for operation at high altitude or at sea level

A slight correction of the setting may be necessary if engine power is not satisfactory when operating at high altitude or at sea level:

:Check the air filter and clean it if necessary.

:Warm up the engine.

At high altitude

:Rotate the high speed adjusting screw (H) clockwise (leaner) – no further than stop.

At sea level

:Rotate the high speed adjusting screw (H) counterclockwise (richer) no further than stop.

Adjusting idle speed

3

H

 

L

/4

1

 

 

/4

 

 

 

L

LA

KN

176BA012

 

Engine stops while idling

:Open the low speed screw (L) counterclockwise one quarter of a turn from max. lean setting.

:Turn the idle speed adjusting screw (LA) clockwise until chain begins to run – then back off the screw one quarter of a turn.

Chain runs when engine is idling

:Open the low speed screw (L) counterclockwise one quarter of a turn from max. lean setting.

:Turn the idle speed adjusting screw (LA) counterclockwise until chain stops running – then turn screw another quarter turn in the same direction.

Erratic idling behavior, poor acceleration

(even though you have opened low speed screw one quarter of a turn)

Idle setting is too lean.

:Turn the low speed adjusting screw

(L) counterclockwise until engine runs and accelerates smoothly.

It is usually necessary to change the setting of the idle speed adjusting screw (LA) after every correction to the low speed adjusting screw (L).

44

MS 440, MS 440 W, MS 440 C