Stihl TS 400 Technical Information

6.2 Fuel system
Carburetor: All-position diaphragm carburetor
with integral fuel pump
Adjustment
High-speed adjusting screw H: Approx. 1 turn open
Low-speed adjusting screw L: Approx. 1 turn open
(Adjustment starts with the screws closed)
Leakage testing of the carburetor
with excess pressure: Pexcess = 0.8 bar
Fuel tank capacity: 0.74 l (1.56 pt))
Fuel mix: Branded mid-grade gasoline (89 octane) and branded two-stroke engine oil
Mixing ratio: 1:50 for STIHL two-stroke engine oil 1:50
Air filter: Prefilter (foam)
Large main filter (paper)
Auxiliary filter (flocked plastic fabric)
6.3 Ignition system
Basic principle: Transistorized (contactless) magneto-ignition system with
integrated control unit and electronic speed limitation
Air gap: 0.15...0.3 mm (0.006 – 0.012 in)
Ignition timing: 1.6 ... 2.2 mm (0.063 – 0.087 in) before TDC at 8000 rpm
Spark plug (suppressed): Bosch WSR 6 F or
NGK BPMR 7 A
Electrode gap: 0.5 mm (0.02 in)
Spark plug thread: M 14 x 1.25
Thread length: 9.5 mm (0.37 in)
Heat range value: 200
Length of ignition lead: 370 mm (14
5
/8 in)
6.4 Tightening torques
DG screws are used in some cases in the TS 400. These screws cut a thread in the material when they
are screwed in for the first time. The material is then permanently threaded. The screws can then be remo-
ved and retightened ad libidum.
The strength of a screw connection is not impaired if the specified tightening torque is maintained.
It is therefore essential to use a torque wrench.
Connecting Thread For Tightening Comments
element size components torque
Nm
Groove-headed screw IS-DG4x14 Starter cover 1,8 1)
Socket-head screw IS-DG4x15 Handle moulding / handle 1,8
Socket-head screw IS-DG4x15 Mount, stop linkage 1,8
Socket-head screw IS-DGM5x20 Handlebar / handlebar mount 8,0
Socket-head screw IS-DG5x20 Tank housing, left / right 7,5
Nut M5 Filter base / carburetor 3,5
Socket-head screw IS-M5x16 Cover, tensioner / cast arm 4,5
Socket-head screw IS-M5x16 Handlebar / tank housing 8,0
Socket-head screw IS-M5x16 Air baffle / crankcase 4,5
Socket-head screw IS-M5x16 Muffler / crankcase 10,0
Socket-head screw IS-M5x16 Muffler / cylinder 10,0
Socket-head screw IS-M5x20 Cast arm / crankcase 10,0
Socket-head screw IS-M5x20 Filter base / tank housing 6,0
Socket-head screw IS-M5x20 Fitler case / filter base 4,0
Technical Information 37.95 - Page 7

Stihl TS 400 Specifications

General

Arbor Size	20 mm
Power Output	3.2 kW
Engine Type	2-stroke
Sound Pressure Level	98 dB(A)
Sound Power Level	109 dB(A)
Maximum Wheel Size	350 mm
Wheel Size	14 in.
Maximum Cutting Depth	125 mm
Cutting Depth	125 mm
Blade Diameter	14 in.
Warranty	2 years
Engine Power	3.2 kW