Jonsered CS 2172 WH - Page 33

CARBURETTOR
English – 33
Basic adjustment for chain saws with speed limited ignition systems (DM51) and carburet-
tors without limiters (RWJ6)
Adjustment of the L-needle and T-needle.
1. Find the highest idling speed by slowly turning the
L-screw clock wise and counter-clockwise.
2. Turn the T-screw until the idling speed is 3 000 rpm.
3. Repeat the procedure in 1 and 2 once again.
4. Turn the L-screw counterclockwise 0,75 of a turn.
5. Adjust the T-screw until the idling speed is 2 700 rpm.
1
2
3 000 rpm
4
0,75
L
5
501 60 02-03
2 700 rpm
584 39 91-01
Adjustment of the H-needle.
1. Adjust the H-screw until the maximum engine speed
at full throttle is 13 300 rpm.
2. Turn the H-needle half a turn clockwise.
12 500 rpm
2
-0,5
1
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: CS 2166 13 300 rpm, CS 2172 13 300 rpm,
CS 2172 WH 13 300 rpm.