20
Repair Manual PS-35
08 CARBURETOR
6
5
7
4
8
3
2
1
Base Setting
L
= 1 1/2
H
= 2 1/4
NOTE:
Adjust the carburetor only
using a tachometer.
Pressure test
Connect the pressure gauge
(chapter 00 item 10) to the
carburetor fuel connection
1
.
Set up a pressure of max. 0.5 bar.
If the pressure drops, check the
following components:
• Inlet needle, if necessary
replace control set
• Inlet needle seat for dirt / foreign
objects, if necessary clean
• Replace gasket
6
and
diaphragm
5
on the pump side
Control lever
General check
• Screen
7
for contamination
• Pulse hole for contamination
Check control parts
(control lever/inlet needle):
Check the tip of the inlet needle for wear.
Check control lever for correct installation, see
illustration to the left, check for wear.
If the control lever is too low:
• Insuf
fi
cient fuel
• Poor acceleration
• No maximum power
If the control lever is too high:
• Carburetor
fl
ooding
• Starting problems
• Poor idling
• Poor transition
Check the pump diaphragm:
• If pump diaphragm is dented, torn, or creased,
• If valve
fl
aps are bent,
replace the diaphragm and gasket
Check control diaphragm:
• If the control diaphragm is bent, hardened or
torn, or if there is visible wear on the button
8
.
• If the diaphragm is not
fl
exible,
replace the diaphragm and gasket.
Control lever
Correctly
Control lever
Too high
Control lever
Too low
