Cylinder - Stihl MS 290 Manual

6.5.1

Cylinder

The cylinder can be removed
without having to take the engine
pan out of the housing.
– Remove the engine, b 6.5
: Lift the crankshaft and pull the
piston out of the cylinder at the
same time.
: Loosen the clamp (1).
: Pull the manifold (2) off the intake
port.
: Disconnect the impulse hose (3).
MS 290, MS 310, MS 390
2
1
: Remove the oil seals (2).
: Inspect ball bearings (1) and
replace if necessary, b 6.7
– Inspect the cylinder and
crankshaft for damage and
replace if necessary.
– Inspect the piston and piston
rings for damage and replace if
necessary, b 6.5.2
If a new cylinder has to be installed,
always fit the matching piston with
piston rings.
– Thoroughly clean all residue of
sealant from the cylinder and
engine pan mating faces.
1
2
3
1
: Push oil seals (1) into position.
– Apply a thin coating of sealant to
the outer diameters of the oil
seals, b 13.
– Lubricate piston and piston rings
with oil.
: Position the piston rings so that
the radii at the ring gap meet at
the fixing pin in the piston groove
when the rings are compressed.
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