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MAINTENANCE
•The carburettor has three adjustment controls:
-L = Low speed jet
-H = High speed jet
-T = Idle adjustment screw
TH
L
•The
Basic settings and running in
The basic carburettor settings are adjusted during testing at the factory. The basic settings are H = 1 turn and L = 1 turn. To provide the engine’s components with good initial lubrication (during running in) the carburettor should be set for a richer fuel mixture for the first
If you are unable to check the fast idle speed using a tachometer the
Fine adjustment
When the machine has been
The recommended engine speeds are as follows:
| Max. fast idle speed, rpm Idle speed, rpm | |
385XP/XPG | 12500 | 2700 |
390XP/XPG | 13500 | 2700 |
Conditions
•Before any adjustments are made the air filter should be clean and the cylinder cover fitted. Adjusting the carburettor while a dirty air filter is in use will result in a leaner mixture next time the filter is cleaned. This can give rise to serious engine damage.
•Carefully turn the L and
•Now start the machine according to the starting instructions and let it warm up for 10 minutes.
CAUTION! If the chain rotates while idling the T- screw must be turned
•Place the machine on a flat surface so that the bar points away from you and so that the bar and chain do not come into contact with the surface or other objects.
Low speed jet L
Try to find the highest idle speed by turning the low speed jet L clockwise then
+ 1/4
L
CAUTION! If the chain rotates while idling the
Fine adjustment of the idle speed T
Adjust the idle speed using the idle adjustment screw T, if it is necessary to readjust. First turn the idle adjustment screw T clockwise until the cutting attachment starts to rotate. Then turn the screw anticlockwise until the cutting attachment stops. The idle speed is correctly adjusted when the engine will run smoothly in every position. The idle speed should also be well below the speed at which the cutting attachment starts to rotate.
WARNING! Contact your servicing
! dealer, if the idle speed setting cannot be adjusted so that the chain stops. Do not use the chain saw until it has been properly adjusted or repaired.
High speed jet H
•The high speed jet H influences the power and engine speed of the machine. If the high speed jet is set too rich
H
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