2100
Removal
Lift off the cylinder cover and remove the throttle
pushrod. Remove the plasticsleevefrom the car-
buretor adjusting needles. Loosenthe screwsre-
taining the carburetor but leavethe carburetor
in its seating. Remove the spark plug protector, and
the spark plug from the cylinder.
Remove the silencerand loosenthe four screws
retaining the cylinder with Allen key No. 5025057-
Fig 7:1
Lift the cylinder. To facilitate removal, the piston
should be at the bottom deadcentre.
57
Cylinder,Piston ~
01.
Fig 7:2
Put a rag into the crankcaseopening to protect
the crankcasefrom the ingressof dirt etc. Remove
the circlips on the wristpin with a pair of flat hose
pliersand pushout the wristpin with fitting drift
No. 5025069-01.
Remove the insulatingpiecefrom the cylinder.
Scrapeoff carbon depositsfrom the exhaust port
and combustion chamber.
DAMAGE
REMEDY
Broken cooling fins, damaged threads.
In case of severe damage, change the cylinder. Restore the
thread with HeIi-Coil inserts.
Seizure marks in the cylinder wall (especially
Polish the marks with a fine emery clotch to remove aluminium
at exhaust port).
deposits.
If the marks are deep, change cylinder and piston.
Surface of the cylinder wall worn (esp. at the top).
Replace cylinder and piston.
Seizure marks on the piston.
Polish the marks carefully with a fine file or emery cloth.
Before fitting the piston, polish the cylinder wall as stated
above. If the marks are deep, change the piston and, if
necessary, the cylinder.
Piston rings stuck in the grooves.
Remove the piston rings carefully and clean the grooves
completely before reassembly.
Check the wear of the piston rings by placing them in the
bottom of the cylinder. The gap between the ends of the
rings should be 0.6 mm max.
Check that the rings are still springy.
Control
Check the following before assembly,and take the measuresrequired.
L
7:1
For Husqvarna Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
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