RedMax HC510DV - Manual (Page 26)

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9. Maintenance
4. Tighten the centre bolt of the idler pulley to fix
the belt adjustment plate.
5. Fit the belt cover as original.
■ ENGINE ADJUSTMENT (MA15)
It is dangerous if the cutter blade continues to
turn even fingers are removed from the throttle
lever. In case it is not solved by readjusting an
idle adjust screw with following procedure,
there are possibility of throttle lever failure or
clutch failure. Ask sales dealer for check and
repair.
The carburetor on your unit has been factory
adjusted, but may require fine tuning due to
change in operating conditions.
Before adjusting the carburetor, make sure that
provided are clean air/fuel filters and fresh,
properly mixed fuel.
When adjusting, take the following steps:
Be sure to adjust the carburetor with the cutter
blade attached.
1. H and L needles are restricted within the number
of turn as shown below.
H needle: 0 ~ -1/4
L needle: 0 ~ -1/4
2. Start engine and allow it to warm up in low
speed for a few minutes.
3. Turn idle adjusting screw (T) counter-clockwise
so that saw chain does not turn. If idling speed is
too slow, turn the screw clockwise.
NOTE
WARNING
MA15