Echo CS-5100 - Manual (Page 11)

SERVICE INFORMATION
CS-4400
CS-5100 11
C B
CS-5100
2-1 General adjusting rules
Before starting the unit for adjustment, check the following items.
1. The correct spark plug must be clean and properly gapped.
2. The air filter element must be clean and properly installed.
3. The muffler exhaust port must be clear of carbon.
4. The fuel lines, tank vent and fuel filter are in good condition and clear of debris.
5. The fuel is fresh ( > 89 octane : RON) and properly mixed at 50 : 1 with “ISO L-EGD” 2-stroke oil.
6. The recommended bar and chain must be installed to the power head, and properly tensioned.
NOTE : Make sure of proper installation of 45 cm guide bar and saw chain when adjusting carburettor, or
serious engine damage may occur due to overspeeding.
2-2 Presetting idle adjust screw, L mixture needle and H mixture needle
1. Tools
A. Plug extractor body B. 2.5mm Hexagonal socket
bolt
C. Nut D. 1.5mm blade screw driver
E. L wrench (2mm) F. 2.5mm hand tap
G. Magneto spanner (6mm)
2. Remove carburettor from unit.
3. Make M2.5 x 0.5mm pitch thread using M2.5
hand tap.
4. Fit the nut (C) on hex. socket bolt (B) near the
bolt head. Place extractor body over the limiter
cap. Pass the bolt (B) with nut (C) through the
hole of the extractor body, and screw the bolt in
the limiter cap 5 turns.
C
B
G
A
F
E
D
Locating pin
Limiter cap
O-ring