Yamabiko ECHO SRM-420ES - Inspecting Metering Lever Height

33
SRM-420ES, SRM-420TES
T410S, B410S
T410TS, B410TS
FUEL SYSTEM
33
4-7 Inspecting crankcase pulse passage
1. Remove pulse pipe (A) from carburetor and drop
a little oil on the end of pulse pipe (A).
2. Remove spark plug and pull starter grip several
times. Oil should spit back from the end.
3. If not, remove oil residue clogging pulse passag-
es in cylinder.
NOTE:
Place pulse pipe (A) horizontally to keep
dropped oil in the pulse pipe.
4-8 Inspecting metering lever height
1. Remove carburetor.
2. Remove screws (A), metering diaphragm cover
(B), metering diaphragm (C) and gasket (D).
3. Inspect metering lever (E) height by Metering
lever gauge 897563-19830 (F).
Metering lever height: 1.65 mm (0.065 in) lower
than diaphragm seat (G).
4. If necessary, gently bend metering lever (E) up
or down to set metering lever to proper position.
NOTE:
When metering lever is:
Too high → Fuel fl ooding occurs
Too low → Fuel starvation / overheating occurs
A
0.4
1.35
1.65
0.4
1.35
1.5
1.65mm
B
C
D
F
G
E
diaphragm seat (G)
A
E