Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Compression Check: Specifications

Compression pressure in the cylinder that is tested
Pressure is measured in bars.
1 bar = 14.5 psi.
There are various diagram charts. The charts for petrol engines are used.
Wear limit: 7.5 bar

Difference in pressure between the individual cylinders
The pressure difference between two cylinders should not be greater than 3 bar