hunterjames Posted August 6, 2008 Share Posted August 6, 2008 i was wonderin it anyboby out there could help me out on what spark plug is susposed to fire first on a 1977 25 horse evenrude motor? the top one or the bottom one? Link to comment Share on other sites More sharing options...
boatfixer Posted August 6, 2008 Share Posted August 6, 2008 They fire 180 degrees apart. The top fires closest to the TDC mark on the flywheel. I hope that answers it for you. Link to comment Share on other sites More sharing options...
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