20 034, 036, 036 QS
Always check and, if necessary,
repair the fuel system, carburetor,
air filter and ignition system before
looking for faults on the engine.
Troubleshooting chart - see
"Standard Repairs, Trouble-
shooting" handbook.
– Drain the fuel and oil tanks.
– Remove the air filter - see 12.1
– Remove the carburetor - see 12.3
Pull the washer (1) off the studs
and remove the sleeve (2) from
the manifold.
– Remove the shroud, spark plug
and, if fitted, the decompression
valve - see 4.3.
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138RA023
1
2
– Remove the muffler - see 5.1
Reassemble in the reverse
sequence.
– Preparations - see 5.2
Take out the four cylinder base
screws.
VA
148RA089
Pull the cylinder off the piston
and, at the same time, push the
manifold through the tank
housing opening.
Caution:
Do not use pointed or sharp-edged
tools for this job.
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138RA024
Remove the cylinder gasket.
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138RA025
Release the hose clamp (1) on
the manifold (2). Pull the manifold
off the intake port.
– Inspect the cylinder and replace it
if necessary.
Note:
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12
If a new cylinder has to be installed,
always fit the matching piston. New
cylinders are only supplied
complete with piston for this reason.
5.2 Exposing the Cylinder 5.3 Cylinder and Piston
5.3.1 Removing