Jonsered CS2186 - Cylinder and Piston

PISTON and CYLINDER
English – 41
Piston and Cylinder
1. Dismantle the following parts:
• Cylinder cover.
• Spark plug.
• Carburettor. See page 30.
• Muffler. See page 17.
2. Unscrew the anti-vibration spring (B) from the cylinder.
See fig. 1.
3. Unscrew the cylinder’s four bolts (C). See fig. 1.
4. Carefully lift up the cylinder.
5. Cover the crankcase opening immediately with a sheet
of paper or a cloth. See fig. 2.
6. Remove one of the piston’s circlips, press out the
gudgeon pin, and remove the piston. See fig. 2.
7. Remove the needle bearing from the connecting rod’s
little-end.
8. Unscrew the decompression valve (D). See fig. 1.
9. Unscrew the intake manifold.
Dismantling
Fig. 1
Fig. 2
Fig. 3
Cleaning and inspection
Clean all parts, scrape off all the remains of any gasket
material and scrape off carbon deposits from the following
surfaces:
1. The piston crown.
2. Top of the cylinder bore (inside).
3. The cylinder exhaust port.
4. The decompression valve channel.
Check the following:
1. That the cylinder’s surface coating is not worn. Especially
in the upper part of the cylinder. See fig. 3.
B
C
D
NOTE!
Exercise care so that dirt and foreign
particles do not get into the crankcase.