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)

Or, hide this message: temporarily or permanently

Compression Check

Measure the highest pressure reading on the compression gage.

Standard compression pressure is 1,400 kPa (199 psi) at 250 rpm.

Minimum allowable compression pressure is 1,100 kPa (156.4 psi) at 250 rpm.

IMPORTANT: The maximum allowable compression pressure difference between any two cylinders is 100 kPa (14.2 psi) at 250 rpm.