Operation CHARM: Car repair manuals for everyone.
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

Ignition Timing Adjustment

Ignition Timing Marks:





Set timing at slow idle and Before Top Dead Center, unless otherwise specified.

U.S. models except high altitude, leave vacuum hoses connected.
High altitude and Canadian models, disconnect and plug distributor vacuum hose.