walleyemaniac Posted July 3, 2010 Share Posted July 3, 2010 Have an '88 90hp Yamaha 2-stroke with NGK BR8HS plugs. Can anyone tell me what these should be gapped at? Thanks Quote Link to comment Share on other sites More sharing options...
propster Posted July 6, 2010 Share Posted July 6, 2010 not 100% positive but seems mine are the same model, or awfully darn close, and mine have no gap, they're just the one piece deal without the L-arm Quote Link to comment Share on other sites More sharing options...
jeffreyd Posted July 6, 2010 Share Posted July 6, 2010 i am betting gap of 8mm Quote Link to comment Share on other sites More sharing options...
jeffreyd Posted July 6, 2010 Share Posted July 6, 2010 i deleted at it was way too confusing go with the link i posted below this message. jeff Quote Link to comment Share on other sites More sharing options...
Surface Tension Posted July 6, 2010 Share Posted July 6, 2010 Plug Gap 0.039 Quote Link to comment Share on other sites More sharing options...
walleyemaniac Posted July 6, 2010 Author Share Posted July 6, 2010 Thanks guys. They came gapped about .040 (all 3 plugs) Yamaha in Marshall told me .028-.030 that's probably to tight, huh. I should put them back to .039? Quote Link to comment Share on other sites More sharing options...
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