Spark Plugs 496HO
#2
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983's are Double Platinum
993's are Iridium
993's are Iridium
#5
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#7
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Photo is just one companies,,,a few other companies make the same thing. Can be found under search of 'Billet Spark Plug Gapper'
#8
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I like that tool but will add --- on double platinum tip spark plugs - (on the tip and the bottom side of the electrode ) you do not touch the gap because you off center the tips that causes misfires. Actually Mercruiser has a video all about that one as well. Thanks for the pics of the tool
Last edited by BUP; 01-31-2017 at 02:17 AM.
#10
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here is what I am talking about in a pic to help understand about gapping the plugs in which can off center the platinum discs, The off center causes misfires. Plus with double platinum tip spark plugs - opening up the gap can ruin the platinum disc on the under side of the electrode depending how or what gap tool is used.
http://shop.advanceautoparts.com/wcs...tinum-plug.jpg
http://shop.advanceautoparts.com/wcs...tinum-plug.jpg
Last edited by BUP; 01-31-2017 at 02:16 AM.