Maintenance - Dolmar MS290.4U Original Instruction Manual

For bike handle model
1
► 1 . Adjustment dial
For loop handle model
► 1 . Adjustment dial
Adjusting the idle speed
CAUTION:
The cutting tool may rotate
during adjustment. Wear your protective equip-
ment and observe all safety instructions.
CAUTION:
The carburetor is factory
adjusted. Never adjust anything other than idle
speed. For other adjustments, consult our authorized
service center.
CAUTION:
Adjust the idle speed so that
the cutting tool does not rotate. The idle speed is
too high if the cutting tool rotates. If the cutting tool
continues to run in idle, consult our authorized service
center.
Appropriate low-speed rotation:3,300 min
If the engine stops or runs unsteadily at idle, turn the
adjustment screw to the right using a Phillips screw-
driver. If the the cutting tool continues to rotate even at
idle, turn the adjustment screw to the left.
1
-1
(rpm).
1
► 1 . Adjustment screw

MAINTENANCE

WARNING:
PROHIBITED.
WARNING:
ments that are not included and described in this
manual are only to be performed by our autho-
rized service center.
CAUTION:
nance, stop the engine and allow it to cool down.
Remove the spark plug and plug cap. Not doing so
may cause the operator to suffer burns or a serious
injury due to an accidental start-up.
CAUTION:
tenance, be sure that all parts are correctly
assembled.
CAUTION:
CAUTION:
resharpened only by an authorized facility. Manual
resharpening may result in imbalances in the cutting
tool, causing vibrations and damage to the tool.
CAUTION:
thinner, alcohol or the like for cleaning the tool.
Discoloration, deformation or cracks may result.
NOTICE:
To ensure a long service life and to
avoid any damage to the equipment, perform
servicing operations at regular intervals.
Daily checks and maintenance
Before starting operation
• Check the machine for loose screws or missing
parts. Pay particular attention to the tightness of
the cutting tool.
• Always check if there is any clogging in the cooling
air passage and the cylinder fins. Clean the cool-
ing air passage and the cylinder fins if necessary.
• Check the functioning of the buttons and levers.
19 ENGLISH
FLAMMABLE ITEMS STRICTLY
Any maintenance or adjust-
Before inspection and mainte-
After inspection and main-
Always wear protective gloves.
The metal blades must be
Never use gasoline, benzine,