Cylinder And Piston - Husqvarna K1270 II Workshop Manual

4. Install the decompression valve, refer to
the decompression valve on page 42 .
5. Move the stop button to the stop position.
6. Slowly pull the starter rope handle and make sure
that there are no leaks from the decompression
valve.
6.7.4 To install the decompression valve
1. Clean and examine the sealing washer.
2. Install the decompression valve.

6.8 Cylinder and piston

6.8.1 To examine the compression of the cylinder
The test shows leakage from the combustion chamber.
1. Operate the engine for some minutes until it is
warm.
2. Close the decompression valve or put in the sealing
Servicing tools overview on page 10 .
plug. Refer to
3. Remove the spark plug.
4. Connect the compression tester to the spark plug
hole.
5. Pull the starter rope 5-6 times and read the pressure
on the gauge. Remove the pressure from the
cylinder and do the procedure some more times.
6. Make a note of the average of the tests.
42 - Repair and servicing
To install
The average for a new engine is approximately 7.5
bar/110 psi. Values less than 5.5 bar/80 psi show faults
with or on the cylinder, piston or piston rings.
6.8.2 To remove the cylinder
1. Loosen the 4 screws and remove the cylinder.
2. Remove the cylinder gasket.
6.8.3 To remove the piston
To remove the piston, use a kit for piston service. Refer
Servicing tools overview on page 11 . The kit contains
to
piston ring compressors, a piston stop, and a support
plate for the piston.
1273 - 001 - 04.11.2019