The plug gap for a 1995 model, 40 hp Mercury is .035 in.
The correct spark plug gap for the 1982 model, 9.8 hp Mercury outboard is .040 in.
is 54 gap for a spark plug mercury mountanier 2002 4.6
What is the spark plug gap for a 9.9hp mercury outboard motor
The 1999 Mercury Tracer was the last model year in North America ( according to one of Fords websites , .054 inch is the spark plug gap on the 1999 Mercury Tracer )
The 1991 Mercury Marquis spark plug gap is .034. Most spark plugs will be pre-gapped by the spark plug manufacturer.
The 1997 model Mercury, 225 hp EFI uses a NGK BR8HS plug, gapped to .035 in.
The recommended spark plug for the 1996 model, carbureted 150 hp Mercury outboard is an NGK BU8H. This is a Perma-Gap type plug, so no gap setting required.
The spark plug gap for a 2003 Mercury 125hp outboard motor is .040"
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.
NGK BPR6HS-10 spark plug. Gap is .040
A Mercury outboard will run well with a plug gap of .035 - .040 in.