Tempo Marine Motor Paint -
Mariner Gray - 1984 and earlier
MFG # 020456
OEM # 92-83222-1
Tip for you - if you are simply doing a touch-up to protect the metal, do some serious sanding (the factory paint job is thick), feather out the edges and use a good aluminum primer, paint and then clear coat (automotive clear coat is more than fine and about half the price of marine clear coat).
The colour (Canadian spelling) WILL NOT match. 35 years of factory faded paint will look nothing like what comes out of the can so if you are trying to make the motor "look pretty" you will have to lightly sand (100 grit) all the paint, repaint the entire motor, replace the decals (after removing the original) and then clear coat.
Here is a before and after - you can see the "new" paint is significantly darker. This was about 30 hours of work and 100 bucks worth of paint and custom decals. Not super cheap, but it sure looks pretty

(and yes, it's the same motor)