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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Spark Plug: Description and Operation
The
spark plugs provide the air gap necessary to produce an arc from energy coming from the ignition coil. This arc ignites the fuel/air mixture in the engine cylinders, producing power.