need help with spark plugs and wires

Discussion in 'Northeast' started by Judoway, Feb 16, 2021.

  1. Judoway

    Judoway New Member

    May 7, 2018
    2000 searay sundancer 260
    5.7 merc
    was going to buy this for a 2000 searay sundancer 260
    NGK 3623 Spark Plug - BPR6EFS, 10 Pack
    for the spark plugs, but need to know which wire go along with this??? and help would be appreciated.
    does this boat have thunderbolt ignition???
  2. Juliery

    Juliery Active Member

    Sep 26, 2020
    Comox, B.C.
    1993 Sea Ray 290 Sundancer
    Galvanized triple axle Road Runner trailer
    7.4 Mercruiser w/ Bravo 2
    Your engine likely has a Tbolt V system. You can buy a OEM wire set or Sierra. They both work well. Try to keep plug wires routed neatly.
  3. Thornton69

    Thornton69 Active Member

    Sep 15, 2014
    Northern BC
    1981 245 SDC
    2020 Solar 420
    '97 5.7 Bravo 2
    '20 Merc 25 EFI Jet
    How did you come up with your plug part number? Assume the top cover is missing? It list the plug number as well as the ignition system (TBV). Could also use the engine serial number located on the block near the starter.
    The '97 260 with TBV in our boat lists AC-MR43T as the plug. Not sure why a 2000 would be different?
    Nothing wrong with going to a non marine supplier to save on these components, but I would not be compromising quality for ignition components for the sake of a few $$.

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