Dolmar PS-350 User Manual
Page 20
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Reparaturanleitung PS-4600 / PS-5000
20
Repair manual PS-350 / PS-420
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.
If the control lever is too low:
• Lack of fuel
• Poor acceleration
• No maximum power
If the control lever is too high:
• Carburetor flooding
• Starting problems
• Poor idling
•
Poor transition
Check the pump diaphragm:
•
If pump diaphragm is dented, torn, or creased,
• If valve flaps are bent,
replace the diaphragm and gasket
Check control diaphragm:
• If control diaphragm is bent or torn, or there
is obvious wear at the button 8.
• If it does not return to its original position
when pulled out of it,
replace the diaphragm and gasket.
6
5
7
4
8
3
2
1
08 CARBURETOR
Control lever
Control lever
Correctly
installed
Control lever
Too high
Control lever
Too low
Basic Setting
(without Limiter Caps)
L= 1 1/2
H= 3
NOTE: Adjust the carburetor only
using a tachometer.
Pressure test
Connect the pressure gauge (chapter
00 item 8 oder 13) to the carburetor
fuel connection 1.
Set up a pressure of max. 0.5 bar.
If the pressure falls, check the
following parts:
•
Correct assembly of Control assy
(Control lever, Inlet needle, Lever
spring, lever axle)
•
Check seat of inlet needle for
dirt/foreign parts, clean if necessary
•
Replace control assy
• Replace gasket 6 and diaphragm 5
of the pump side