.35
you have to make ngk b8hs-10
The spark plug gap for most Yamaha outboards is around .030 - 0.035in.
The recommended spark plug gap (per NGK) is .039"
.04 inch
The 1998 model, Yamaha 250 hp outboard, requires an NGK BR9HS-10 spark plug, gapped to .039 in.
The correct air gap is .032 in.
The Yamaha Pro 50 outboard requires an NGK BR8HS-10 plug, gapped to .039in.
The spark plug gap for a 2003 Mercury 125hp outboard motor is .040"
The correct gap would be .030 ln.
j4j
.030
spark plug gap for a 1996 mercury 30 hp outboard motor?