The recommended gap is .040 in.
100 hp searay
Stator is bad witch is under your fly wheel or bad switch board that send power to spark plugs
The 1999 model, 90 hp Mercury outboard requires an NGK BUHW-2 spark plug, standard plug wires are acceptable.
The correct spark plug gap for the 2004 model, 40 hp Mercury outboard 2 stroke is .040 in.
The 2004 model, 60 hp Mercury outboard uses an NGK BPZ8H-N-10, gapped to .040 in.
The proceedure is the same as with other models. Simply remove the old plugs, 13/16's wrench, check the plug air gap, and replace with plugs of correct type.
According to one of Fords websites : For the 3.0 liter V6 engine in a 1996 Mercury Villager : The spark plugs are gapped at ( .034 inch )
( 6 ) if you have the 4.0 liter SOHC , V6 engine and ( 8 ) if you have the 5.0 liter , V8 engine
.025 Champian J4J (cold) to J8J (plugs) Points .018 - .02
The recommended spark plug for the 1977 model, 7.5 hp Mercury outboard is a Champion L78V, or NGK BUHW-2. Both brands are Perma Gap type plugs, with the Champion being the manufacturer supplied plug back in 1977.
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 warning system on the 1994 model Mercury outboard can be activated by either the low oil sensor, located in the bottom of the oil reservoir, or the overheat sensor, located in the block near the spark plugs. The oil sensor will cause a series of "beeps" while the overheat will sound a continuous tone.