Stihl MS 250 Service Manual

5MS 210, MS 230, MS 250
3.2 Fuel System
Carburetor leakage test
at gauge pressure: 0.8 bar (11.6 psi)
Function of tank vent
at gauge pressure: 0.3 bar (4.35 psi)
0.05 bar (0.72 psi)
Fuel: see owner’s manual
3.3 Ignition System
Air gap between ignition module
and fanwheel: 0.2 – 0.4 mm (0.008 – 0.015 in)
Spark plug (resistor type): Bosch WSR 6F
NGK BPMR 7A
Electrode gap: 0.5 mm (0.02 in)
3.4 Chain Lubrication
Fully automatic speed-controlled oil pump with rotary piston
Oil delivery rate: approx. 7.5 cc/min (0.46 cu in/min) at 10,000 rpm

Stihl MS 250 Specifications

General

Engine Power	2.3 kW
Power output	2.3 kW
Displacement	45.4 cc
Weight	4.6 kg
Weight (without cutting equipment)	4.6 kg
Fuel Capacity	0.47 l
Fuel tank volume	0.47 l
Bar Length	40 cm
Chain Oil Capacity	0.20 l
Oil Capacity	0.20 l
Chain pitch	3/8"