According to the 1997 Mercury Mountaineer Owner Guide :
For the 5.0 liter / 302 cubic inch V8 engine :
( the spark plug gap is .052 to .056 inch ) * confirm with the Vehicle Emissions Control Information ( VECI ) decal in the front of your engine compartment
On a 1997 to 2001 Mercury Mountaineer : Check the Vehicle Emissions Control Information ( VECI ) decal located in the front of your engine compartment . It shows what type of spark plug to use and the spark plug gap
is 54 gap for a spark plug mercury mountanier 2002 4.6
blown head or cracked block
spark plug gap for 5.0 liter engine is 0.054 inches
The 1997 model Mercury, 225 hp EFI uses a NGK BR8HS plug, gapped to .035 in.
.054
The number 1 spark plug is left side.If you were looking at the engine from the front to the back and is the first one on the left.
what is the spark plugs firing order for a mercury villager 1997
1.3 to 1.4 mm ( .052 to .056 inch )
Check the Vehicle Emission Control Information ( VECI ) decal in the front of your engine compartment . It will show what type of spark plug to use and the spark plug gap
A spark plug socket.
Check the Vehicle Emission Control Information ( VECI ) decal located in the engine compartment ( it will show what type of spark plugs to use and the spark plug gap )