Stihl MS 171 Manual page 37

The pistons rings are compressed
by the inner taper of the cylinder.
: Carefully push the piston with
crankshaft into the cylinder
(arrow).
: Apply thin coating of sealant to
the outside diameter (arrows) of
the oil seals, b 16
: Position the crankshaft with
bearings and oil seals in the
bearing seats in the cylinder,
making sure the oil seals are
properly seated (arrows) in the
housing.
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– Inspect and clean the mating face
on the engine pan, remove
gasket residue if necessary,
b 16
The mating faces must be perfectly
clean and not be damaged in any
way. Replace parts with damaged
mating faces.
: Apply sealant along the groove,
b 16
Sealant must not get into the
recesses (arrows) – the transfer
ports must not be obstructed.
: Place the engine pan (1) on the
cylinder.
Apply slight pressure to the engine
pan so that the sealant is evenly
distributed .
Take care not to damage the
crankshaft stubs.
– Clean the crankshaft stub, b 16
– Install the engine, b 8.5
– Reassemble all other parts in the
reverse sequence.
8.7 Ball Bearings/Crankshaft
– Remove the engine, b 8.5
– Remove the crankshaft and oil
seals, b 8.6
– Remove the piston, b 8.8
: Pull the ball bearing (1) off the
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ignition end of the crankshaft.
: Pull the ball bearing (1) off the
clutch end of the crankshaft.
MS 171, MS 181, MS 211
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