Features:

2-stroke engine with stratified charge. A fuel-free layer of air is created between the burned charge in the combustion chamber and the fresh charge in the crankcase, reducing the amount of fuel lost during the charge cycle. This results in more power with a lower weight, up to 20% lower fuel consumption than regular 2-stroke engines and significantly reduced exhaust emissions.
A small fuel pump delivers fuel to the carburettor at the touch of a button. This reduces the number of starting strokes required following extended breaks in operations.
Simply set the choke, pump the fuel primer, pull the starter cord and away you go! The running machine then switches off after a brief press of the stop button. Once the machine is at a standstill, the ignition activates again automatically. Thus the ignition is always ready for starting.
Easy, comfortable thumb-operated control means the operator's hand never leaves the handle.

STIHL FS 40 Technical Dta:

Sound power level with metal tool dB(A) ¹⁾	109
Power output hp	1
Performance kW	0.7
Displacement cm3	27.2
Weight kg ²⁾	4.4
Sound pressure level with plastic tool dB(A) ¹⁾	94
Sound power level dB(A) ¹⁾	107
Vibration value, right with plastic tool m/s2 ³⁾	6.4
Vibration value, left with plastic tool m/s2 ³⁾	7
Total length cm ⁴⁾	145
Cutting diameter mm	380
Tank volume l	0.34
Displacement cm³	27.2
Power output kW/bhp	0.7/1.0
Weight kg ⁵⁾	4.4
Standard cutting tool	AutoCut C 6-2

1) K-factor according to DIR 2006/42/EC = 2.5 dB (A)
2) Without fuel, cutting tool and without protection
3) K-factor according to DIR 2006/42/EC = 2m / s ²
4) Without cutting tool
5) without cutting tool and deflector