The magneto point gap on a 2hp Yamaha outboard is 0.35mm, or 0.014".
The Yamaha Pro 50 outboard requires an NGK BR8HS-10 plug, gapped to .039in.
The spark plug gap for most Yamaha outboards is around .030 - 0.035in.
The maker points on the 4.5 hp Mercury outboard, are set at 0.020 in.
.35
gap should be 0.9mm (0.035") N.
The recommended spark plug gap (per NGK) is .039"
0.6 - 0.7mm (0.024-0.028 inches)
.04 inch
The points gap on a Merc 40 4hp is .020
The point setting on a 30hp Chrysler outboard would be .020in. if you are refiling your old points they should be set at .018in
The maker points on a 9.8 hp Mercury outboard should be set to .020 in.
Gap should be 0.20 if you are regapping old points 0.18 Good luck!