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
DESCRIPTION - STANDARD 4 CYLINDERAll engines use resistor
spark plugs. They have resistance values ranging from
3,000 to 7,500 ohms when checked with
at least a 1000 volt spark plug tester.
Do not use an ohm meter to check the resistance of the
spark plugs. This will give an inaccurate reading.
Refer to the Specifications for gap and type of
spark plug.