Reply To: 1938 Sea King help needed.

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October 29, 2019 at 9:13 pm #186127
ROBERT LAFAYETTE
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    Champion C-7 Equivalent spark plugs.

    https://www.sparkplug-crossreference.com/convert/CHAMP_PN/C7

    I used a 8-32 die and chased the threads on the AC Delco C86 spark plugs I had and installed on Model 499 (see pic)

    The Model 449 (2.8 HP) had RIVERSIDE (WARDS) 4C plugs installed?