RedMax GZ7100, Руководство по ремонту, Страница: 36 / 52

CARBURETTOR
36 – English
Carburettor with limiters
On EPA/EU carburettors both the H- and L-needles are fi tted with limiters to prevent the chain saw operator from
changing the adjustment above EPA/EU standard. These limit the adjustment range to a maximum of ½ turn.
After replacing the carburettor or high speed and/or low speed needle on an EPA (The US Environmental Protection
Agency)/EU (European union) certifi ed product, a basic adjustment must be carried out as described below in order to
meet the EPA/EU-requirements. This is to achieve as low emissions as possible. This instruction is made for EPA/EU
certifi ed products only.
Adjustment of the L-needle and T-needle.
1. Turn the L-screw counterclockwise to stop using a
common, fl at carburettor screwdriver.
2. Turn the T-screw until the idling speed is 3 000 rpm.
3. Press in the locking sleeve on the L-screw using the
special screw driver with splines.
4. While keep pressing the screwdriver, fi nd the high
estidling speed by slowly turning the L-screw clock
wise and counter-clockwise.
5. Again, turn the T-screw until the idling speed is 3 000
rpm.
6. Repeat the procedure in 3, 4 and 5 once again.
7. While keep pressing the screwdriver, turn the
L-screw counterclockwise 0,75 of a turn (engine may
die).
8. Adjust the T-screw until the idling speed is 2 700 rpm.
Basic adjustment for EPA/EU chain saws with speed limited ignition systems (AM50, DM51)
and carburettors with limiters (RWJ4)
The models are equipped with speed limited ignition systems and carburettors with limiters. A slightly diff erent adjustment
procedure is necessary when replacing the carburettor or needles on these models
.
Speed limitation
Due to the integrated speed limitation in the ignition system most tachometers will not indicate a speed above the value that
the speed limitation is set to. Speed limitation regulates at: GZ7100
13 300 rpm.