Black Max BM5020 Operator's Manual page 33

CLEANING THE STARTER UNIT
See Figure 63.
Use a brush or compressed air to keep the cooling
vents of the starter assembly free and clean of debris.
ADJUSTING THE CARBURETOR
See Figure 63 - 64.
WARNING:
The chain will move around the guide bar when
adjusting the idle speed. Wear all protective cloth-
ing and keep all bystanders, children, and pets at
least 50 ft. away. Make adjustments with the unit
supported on a stable surface so that the chain/
guide bar does not contact the ground or any
object. Keep all parts of your body away from the
chain/guide bar and muffler. Failure to follow these
instructions could result in serious personal injury.
Before adjusting the carburetor:
 Use a brush or compressed air to clean the starter
cover vents.
 Clean the air filter. Refer to Cleaning the Air Filter
in the Maintenance section of this manual.
 Allow the engine to warm up prior to adjustment
of engine idle speed.
WARNING:
Weather conditions and altitude may affect carbu-
retion. Do not allow bystanders close to the chain
saw while adjusting the carburetor.
Idle Speed Adjustment —The idle speed adjust-
ment controls how much the throttle valve stays
open when the throttle trigger is released. To adjust:
 Turn idle speed screw "T" clockwise to increase
idle speed.
 Turn idle speed screw "T" counterclockwise to
decrease idle speed.
WARNING:
THE SAW CHAIN SHOULD NEVER TURN AT
IDLE. Serious personal injury may result from the
saw chain turning at idle.
MAINTENANCE
SCREW
STARTER COVER
Page 33 — English
PUSH DOWN KNOB
AND TURN TO LOCK
AIR FILTER
VENTS
Fig. 62
Fig. 63
IDLE SPEED
SCREW "T"
Fig. 64