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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Evaporative Check Valve: Testing and Inspection

Remove check valve and check for leakage by blowing air into the ports. Air should flow through the check side (crankcase side) but not through the relief side (air cleaner side). Replace valve if not functioning properly.