Stihl MS250 User Manual

2
REMOVING AND REPLACING TWO DIFFERENT SIZE BARS, SAW CHAINS, AND CHAIN
SPROCKETS ON A STIHL
®
MS 250 CHAINSAW
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LIST OF MATERIALS AND EQUIPMENT
Failure to replace this bearing will most certainly do serious damage to the saw. It is
dicult to hear the damage being done over the normal engine noise of the saw. The
saw will operate for a short time, even if the bearing is missing and the operator will
be unaware of the internal damage being done. The saw will not operate long in this
condition and will eventually cease to quit working.
During the procedure a sprocket cover will be removed with a STIHL
®
wrench. If you
do not have the STIHL
®
wrench you can use a size 3/4” wrench.
While removing and replacing the saw chains it is suggested that you wear mechanic
style gloves because removing and replacing sharp chains without proper gloves can
cause serious injury.
A small C-clip will need to be removed and replaced from the crankshaft post. When
replacing this clip you will need to tap it lightly but sharply with a hammer and
screwdriver. You must be really focused to perform this because this c-clip is about the
size of a nickel and weighs less than one.
Stihl
Lithium Grease

Stihl MS250 Specifications

General

Displacement	45.4 cc
Engine type	2-stroke
Ignition system	Electronic
Fuel Capacity	0.47 L (15.9 oz)
Chain Oil Capacity	200 cc
Guide Bar Length	40 cm (16 inches)
Oilomatic chain pitch	3/8"
Bar length range	16 in to 18 in
Weight	4.6 kg (10.1 lbs) without bar and chain