This info in in the owner's manual and under the hood on a placard.
I don't think that you need to gap the plug if you get a plug that is specific to your bike. Mine has a NGK R6252K-105 in it. I think that is the same type of plug that they come from the factory with. If you're not getting spark then you probably have a fouled plug or something else wrong.
Thre is no gap on the plug as it a surface fire plug.
.035 gap
.045
.035
The plug gap for a 1995 model, 85 hp Suzuki outboard is .039 in.
its gaped at .25
If you just bored it once or twice over, your stock spark plug will be all you need. A NGK BR10ECM (or corresponding plug from another brand) with a .032" (0.8mm) gap.
0.7 mm
the gap spec is .044 for 2brl 302 eng.
.028-.032 will work good.
The year of the motor is 1985? Then it is not a Mercury Force. Also with the plugs that it takes, there is no gap adjustment,