The 2002 model, 60 hp Mercury outboard requires an NGK BP8H-N-10 spark plug, the gap set to .040in.
The dry weight of a 2002 model, 75hp Mercury outboard 4 stroke, is 386 lbs.
the port side clamp bracket or the freeze plug on motor
.052 to .056 inch ( 1.3 to 1.4 mm )
is 54 gap for a spark plug mercury mountanier 2002 4.6
50:1
261 lbs
The spark plugs come pre-set. NGK B7HS-10. THe last (2) numbers of "10" indicate the pre-set gap.
on the motor
50:1
yes
Remove the spark plug wires from your 2002 Mercury Grand Marquis spark plugs. Remove the spark plugs by turning them to the left with a deep well 5/8 socket. Reverse the process to install the new spark plugs.
I would assume there is no oil reservoir in that motor. The oil is mixed in with the gas each time you fill the tank. There is probably lubricant (oil) in the lower unit gearcase, but I don't know the procedure for changing that.