Stihl Saw Carburetors Work Shop Repair Manual

  Stihl Saw Carburetors chainsaws

On Cd



Easy to read exploded views to make easy
identification, careful disassembly, accurate
adjustment, and correct repairs.

All sections are neatly organized in Adobe Acrobat,
very clean, sharp images that are scalable to
several times normal size. Tons of crystal clear
illustrations, specifications, lots of pictures, step-by-
step instructions, special tool info etc.

This is like the original manual made for
these model chainsaws; the only difference is this
one is not paper, it's shipped on Cd!
You get it, Zoom it, print it, save it, close
it. Print a few pages at a time, as you need; no
need to lug that bulky binder around anymore!

Once you buy the manual just go view it, print it, and
save it for many more uses later on.

Carburetors

Contents

1. Safety Precautions 2

2. Introduction 2

3. Assignment 3

3.1 Designation 8

4. Purpose of

Carburetor 8

5. Construction/Function 9

5.1 Fuel Pump 9

5.2 Operating Conditions 11

5.2.1 Full Load 11

5.2.2 Idle 12

5.2.3 Carburetor with

Fixed Idle Jet

and Primary Mixture

Control 14

5.2.4 Carburetor with

Balanced Idle System

(Fixed Idle Jet and

Air Bypass System) 15

5.2.5 Part Load 16

5.3 Problematic

Operating Conditions 17

5.3.1 Starting 17

5.3.2 Temperatures/

Humidity 19

5.3.3 Acceleration 19

5.3.4 Dirty Air Filter/

Compensator 20

5.4 Special Features 21

6. Troubleshooting

Chart 23

7. Servicing 25

7.1 Leakage Test 25

7.2 Cleaning 25

7.3 Pump Diaphragm 26

7.4 Metering Diaphragm 26

7.5 Inlet Needle 27

7.6 Main Jet 28

7.7 Full-Load Fixed Jet/

Part-Load Fixed Jet 29

7.8 Control Valve 29

7.9 Manual Fuel Pump 30

7.10 Check Valve 30

7.11 Carburetor Body 31

7.12 Throttle Shaft 32

7.13 Choke Shaft 34

7.14 Accelerator Pump 35

7.15 Lever Mechanism

on Carburetors with

Automatic Choke 36

7.15.1 Throttle Shaft/

Choke Shaft 38

7.16 HL-324A / HL-327D /

LA-S8A Carburetors 38

7.16.1 Throttle Shaft 43

7.16.2 Choke Shaft 44

7.17 WYL-63 / WYL-73

Rotary Valve

Carburetors 45

7.18 Standard Setting on

Walbro Carburetors 50

7.18.1 WT-283B, WT-323,

WT-325A, WT-326C,

WT-360, WT-396,

WT-403A, WT-493,

WT-498A, WT-503

Fixed Jet Carburetors 50

7.18.2 HD-13A, HD-16, HD-17,

HD-18A, HD-21A, HD-22,

WY-69, WT-329, WT-330,

WT-367, WT-393,

WT-489, WT-492,

WJ-69 Carburetors

with Limiter Caps 51

7.19 Standard Setting on

Zama Carburetors 54

7.19.1 C1Q-S30C, C1Q-S37A,

C1Q-S41, C1Q-S42,

C1Q-S34B, C1Q-S36B

Fixed Jet Carburetors 54

7.19.2 C1Q-SK7, C3A-S39A

Carburetors with

Limiter Caps 55

7.20 Standard Setting on

Tillotson Carburetors 59

7.20.1 Fixed Jet Carburetors:

HS-275A, HS-279B 59

7.20.2 HL-366A, HS-280A,

HS-281A, HT-12A

Carburetors with

Limiter Caps 60

7.21 Flow Chart 64

8. Special Servicing

Tools and Aids 65

8.1 Special Servicing Tools 65

8.2 Servicing Aids 65