Dolmar PS-350 User Manual download pdf (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 th

ere

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

C

ontrol lever

Too low

Bas

ic

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

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