Shindaiwa 357 Service Manual download pdf (Page 33)

Q Shindaiwa Inc. 1995 33

Carburetors Section 3

Reassembly is basically the reverse of

disasembly, with the following additions or

exceptions:

Cup Plug and Screen

When replacing a capillary screen, be espe-

cially carefull to seat all components to their

original depth and orientation! Incorrect

installation may block the fuel supply opening

to the main nozzle, causing the saw to run in a

lean (fuel starved) condition (Figure 3.24).

■ Installl the capillary screen and retainer in

the reverse order of removal.

■ Using an appropriate driver, carefully seat a

new cup plug p/n 88-119 in the bore above

the main nozzle.

IMPORTANT!

Careless cup plug installation can block

fuel flowing from the high speed needle!

Drive the new cup plug

only

until its upper

edge is even with the meteing chamber

floor!

Welch Plug

■ Using Walbro driver p/n 500-15 and a small

hammer, install a new welch plug p/n 88-28

as shown in Figure 3.25.

IMPORTANT!

A leaking welch plug may cause an engine

to respond poorly to idle mixture adjust-

ments. If necessary, additional sealing can

be guaranteed by appling a thin coating of

nail polish around the edge of the welch

plug installation.

Metering Assembly

■ Lightly lubricate the metering valve with

fresh fuel mixture, and then install the valve

assembly in the reverse order of removal.

■ After installing the metering lever assembly,

use a straightedge and thickness gauge or

use Walbro gauge p/n 500-13 to check for

proper metering lever height (Figure 3.26).

■ Install the metering lever gasket, dia-

phragm, and cover, and then install and

firmly tighten the four cover screws.

Fuel Pump

Install the fuel pump gaskets and diaphragm

in the reverse order of disassembly.

HDA and WT

Reassembly

CRB-83

METERING

LEVER GAGE

WA

WT

WS

WS

SDC

HDA

HDB

HDC

MDC

CRB-80

CRB-79

METERING

LEVER GAGE

WA

WT

WS

WS

SDC

HDA

HDB

HDC

MDC

HDA Carburetor

WT Carburetor

Fuel Inlet

Screen

Retainer

Cup Plug

DO NOT

BLOCK!

Figure 3.24 Screen and Cup Plug Installation

CRB-88

Figure 3.25 Welch Plug Installation

Welch Plug

Walbro p/n

500-15

Figure 3.26 Checking Metering Lever Height

Walbro p/n

500-13

CARBURETORS

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 137 138

Comments to this Manuals

No comments