44 – English
PISTON and CYLINDER
Pressure testing
The following parts must be removed to pressure test the
crankcase and cylinder:
• Carburettor. See page 32.
• Muffler. See page 17.
Carry out pressure testing as follows:
1. Remove the support ring in the intake manifold. Fit
cover plate 502 54 05-01 with M4x15 mm bolt on the
intake manifold. See fig. 13. Fit cover plate 502 71 39-01
with M6x20 mm on the exhaust port. See fig. 12.
2. Connect tool 502 50 38-01 to the cover plate on the
intake manifold. See fig. 14. The decompression valve
should be closed.
3. Plug the hose to the impulse channel.
4. Pump up the pressure to 80 kPa (0.8 bar).
5. Wait 30 seconds.
6. The pressure must not fall below 60 kPa (0.6 bar).
7. Leakage can occur in the decompression valve and
crankshaft seals.
8. Assemble the following parts:
• Carburettor. See page 35.
• Muffler. See page 17.
Fig. 12
Fig. 13
Fig. 14
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