Gap at .040 (fourty thousandths)
NGK bpr7hs-10
NGK BPR6HS-10 spark plug. Gap is .040
Ngk bpz8h-n-10
ngk buhw2 or ngk buhw
The 1990 model, 90 hp Evinrude outboard can use either an NGK BR7HS, or Champion L77JC4.
An 8 hp Mercury outboard uses the following plugs, depending on the model. 1986-2000, 2 stroke, NGK BP8H-N-10 (0.40 gap) 2001-2006, 2 stroke, NGK BPZ8H-N-10 (0.40 gap) 2006, 4 stroke, NGK DCPR6E (.035 gap)
The 2002 model, 60 hp Mercury outboard requires an NGK BP8H-N-10 spark plug, the gap set to .040in.
There are several plugs recommended: 2 Stroke 1963-1966, NGK B6S, gapped to .025 1967-1968, NGK B6HS, gapped to .030 1986-2000, NGK BP8H-N-10, gapped to .040 2001-2006, NGK BPZ8H-N-10, gapped to .040 4 Stroke 2000-2006, NGK DCPR6E, gapped to .035
The 3 cylinder model Mercury 90, uses a NGK BUHW-2, or Champion L78V. The 6 cylinder model, takes a NGK BUHW, or a Champion L76V.
The 2006 model, 60 hp Mercury outboard 2 stroke requires a NGK BPZ8H-N-10. The 4 stroke model requires an NGK DCPR7E.
For a 2005, Mercury 3.3 hp outboard, a NGK BPR6HS.
The recommended spark plug for a 1992 model, 200hp Mercury 2 stroke carbureted outboard, is an NGK BU8H. This is a perma-gap type plug, so no gap setting is required.