Stihl TS 420 - 1. Introduction

2 TS 410, TS 420
Contents
12. Fuel system 77
12.1 Air filter 77
12.2 Carburetor, removal and
installation 77
12.2.1 Leakage testing 79
12.3 Repairing the
carburetor 79
12.3.1 Metering diaphragm 79
12.3.2 Inlet needle 80
12.3.3 Fixed jet 81
12.3.4 Pump diaphragm 81
12.3.5 Air valve 83
12.3.6 Choke shaft /
choke shutter 85
12.3.7 Throttle shaft /
throttle shutter 87
12.3.8 Adjusting screws 89
12.4 Carburetor adjustment 90
12.4.1 Basic setting 90
12.4.2 Standard setting 91
12.5 Choke rod and
throttle rod 92
12.6 Intake elbow, removal
and installation 93
12.6.1 Impulse hose 94
12.7 Tank vent 95
12.7.1 Testing 95
12.7.2 Removal and
installation 96
12.7.3 Manual fuel pump 96
12.8 Fuel Intake 97
12.8.1 Pickup body 97
12.8.2 Fuel hoses 98
12.8.3 Fuel tank filler cap 99
12.9 Tank housing, removal
and installation 99
13. Special tools 101
14. Servicing
accessories 103