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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Positive Crankcase Ventilation: Specifications

Manometer Specification:
One inch (1") water pressure at idle to approximately 3-4 inches water vacuum at full load.

Add the amount that the manometer column travels up, to amount column travels down to obtain total PSI/Vacuum.
Example:
One-half inch above zero plus one-half inch below zero equals one inch vacuum reading. (1/2" + 1/2" = 1").