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  1. 212Islander

    1997 454 mag carb 0K198678 timing

    Thanks for the input alldodge, is this standard base timing that the engine cover would say - bought boat with out engine cover and merc sticker? Or is 8* BTDC including the 2* advance for altitude above 5,000’? Thank you
  2. 212Islander

    1997 454 mag carb 0K198678 timing

    Thanks for the attachment - I had seen a couple pages of this manual before but nice to read all of it. Calling Mercruiser is also a great idea. Thanks you for the leads.
  3. 212Islander

    1997 454 mag carb 0K198678 timing

    Hello everyone - first off I have searched for said manual and have not had any luck with the manual links. Second off I understand how to set Thunderbolt V into timing base mode. My main question is I don’t know what to set the timing at. I only boat at 6,000 ft plus elevation and need a...
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