Brent------my 2007 (200 Opti) manual calls for the NGK-IZFR5G---gapped at 0.80mm (0.31 in) , these are the Laser Iridium plugs. I bought some from ----Dave Knows Deals----for $11 ea.(if you buy 12) ---e-mail address is
campnout@cox.net----he also has an e-bay store (dave knows deals )----he has all of the NGK plugs at a discounted price, may save you some money ----really nice guy to deal with-----good luck,------- Monk
PS-----the PZFR5F-11 are the (double Platinum plugs) and the gap reccomended is .44 (1996-2000 Mercury 150 OptiMax DFI 150 HP)
the IZFR5G are the (laser iridium plugs) and the gap reccomended is .31 (2003-2006 Mercury OptiMax 150 DFI)