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MAINTENANCE
6. Adjusting the idle speed:
It is usually necessary to change the setting of
the idle speed adjusting screw (Ref. I) after every
correction to the low speed adjusting screw (Ref.
L).
7. Proper idling speed:
ST23,26............. 2,800-3,000 rpm
ST35.................. 2,500-2,700 rpm
8. The engine stops while idling:
Turn the idle speed adjusting screw (Ref. I)
clockwise until the engine runs smoothly, but the
cutting tool must not rotate.
9. The cutting tool rotates when the engine is
idling:
Turn the idle speed adjusting screw (Ref. I)
counterclockwise until the cutting tool stops
rotating then return the screw about another half
turn from that position.
10. Erratic idling behavior, poor acceleration:
The idle setting is too lean. Turn the low speed
adjusting screw (Ref. L) counterclockwise until
the engine runs and accelerates smoothly.
11. Adjusting high speed:
Adjust the low adjustment screw (Ref. L) for the
smooth engine idling. Then increase the engine
speed and adjust the high speed adjustment
screw (Ref. H) for stable engine rotation. The
engine acceleration should be smooth with
proper adjustment.
(High Engine Speed..........10,000-11,000 rpm)