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    right plugs for 1978 Mercury outboard motor 800 - 80 horse power

    I don't claim to be the sharpest pencil on motors but my motor has been starting real hard since mechanic putzed with it. I pulled cover off and looked at plugs - all four and it said L78V champions but no gaps things like I am used to seeing like on lawm mower - just flat at the end - confused...
  2. S

    What's the year?

    I looked in two places and one said I have a 1969 motor ( mercury) and other said 1978 - serial number 4834119 from grease fitting below head cover . cover says thunderbolt ignition - 800 - 80 horse power mercury. Inside says 1978 with band off - may 10 I think - any help needed.
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