[Nikolaj]

Данные с сервисного мануала по ремонту двигателя.

Compression Check
Normal Compression (All Models) 787 – 856 kPa (115 – 125 psi)
1. Remove spark plugs.
2. Install compression gauge in spark plug hole.
3. Hold throttle plate at W.O.T.
4. Crank the engine over until the compression reading peaks.
5. Check and record compression of each cylinder. The difference in compression
readings between each cylinder should not vary more than 15%. If compression varies
by more than 15% or compression for both cylinders is less than 685kPa (100psi), the
powerhead should be disassembled and inspected.
6. Compression check is important because an engine with low or uneven compression
cannot be tuned successfully to give peak performance. It is essential, therefore, that
improper compression be corrected before proceeding with an engine tuneup.
7. Cylinder scoring: If powerhead shows any indication of overheating, such as discolored
or scorched paint, visually inspect cylinders for scoring or other damage. Refer to
Section 4 Powerhead.