Champion QL77CC Plugs

[Wvgasman]

OK, I have a 2003 225 EFI Ser# 0T700621. Are the Champion QL77CC plugs the proper plugs for my engine?
I checked the sticky and the spark plugs listed are for 2002 model and earlier. Mine is an 2003

Thanks you for your help..

[MikeKz]

From sticky:

Spark Plugs:
-QL77CC (Champion) for 3 Liter EFI's (XB models or 2001 and EARLIER: .035" / All 2002-> Down-draft intake models: .040")
-IZFR5G (NGK)@ .032-.033" for Standard Opti's 135-225HP, 2001 200XS, and 200 ProXS PRIOR TO Serial Number#1B912786***
-IZFR5J (NGK) @.032-.033 for 75-115 Opti's
-IZFR6J (NGK)for 150/175/200 ProXS (200 ProXS Serial #1B912786-up) & 225-250 ProXS and Racing XS Motors
-2006 & prior ProXS: .032-.033"
-2007 & up: .042-.044" gap for best idle performance. (150/175/225/250 ProXS/XS)


Way I read it, 2002 and up that have down draft use those plugs set at .040" gap.

[Savage]

OK, I have a 2003 225 EFI Ser# 0T700621. Are the Champion QL77CC plugs the proper plugs for my engine?
I checked the sticky and the spark plugs listed are for 2002 model and earlier. Mine is an 2003

Thanks you for your help..

Yes.

[Wvgasman]

My bad, miss read the greater than sign

[EuropeanAM]

ANY 3L EFI Mercury requires the QL77CC (only exception is the 300X).