The recommended gap setting is .032 in. Open or close the ground electrode to aquire this clearance, as measured with a feeler gage.
I use the QL77JC4 Champion plugs with a 0.030in gap.
The recommended plug gap for the 1993 model, 3hp Evinrude outboard is .030 in.
.30
The 1990 model, 90 hp Evinrude outboard can use either an NGK BR7HS, or Champion L77JC4.
The Gap is .030
The correct spark plug gap for the 1994 model, 25 hp Evinrude outboard is .030 in.
The 1996 model, 175 hp Evinrude outboard spark plug recommendations...... Champion Ql78YC gapped at .030
I have a 1979 Evinrude 35 Hp Model 35902A and it has Champion L77SC4 Plugs in it and it runs great. Hope this helps
The correct air gap is .032 in.
RJ8C Champion
100 hp searay
The correct gap would be .030 ln.