Don,
I just ordered some NGK IZFR6J plugs for my 06 Pro Xs and noticed on the invoice that it states - " DO NOT GAP IRIDIUM PLUGS, YOU WILL SNAP THE CENTER ELECTRODE." At $12.30 a piece I don't want to break a plug.
In your sticky up top you note -2006 & up: .040" gap for best idle performance. (225-250 ProXS/XS)
At $12.30 a piece I don't want to break a plug trying to adjust the gap. Do I leave them as is or what?
Thanks....
2019 Blackjack 256
Mercury Verado 350
On a 225 ProXS with NO IDLE ISSUES-
Do not attempt to regap the plugs. You would see no benefit from doing so.
The .040 gap is PRIMARILY for 250 XS and 250 ProXS engines (or some 225's with idle quality issues).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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2019 Blackjack 256
Mercury Verado 350
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