The 1998 model, Yamaha 250 hp outboard, requires an NGK BR9HS-10 spark plug, gapped to .039 in.
only if you are jesus and you plan on working a miricle
The spark plug gap for a 1994 Yamaha YZ250 should be .024 inches. A Yamaha YZ250 is a 249cc motorcycle.
Spark plug gap for the Yamaha Zeal FZX 250 is 0.7 - 0.8mm, according the service manual
The correct spark plug for this model is the NGK B-7ES.
b8es NGK
no it will just fail the spark plug more often
the gap is .025
The proper spark plug gap for a 2002 Yamaha YZ250 is .024 inches. New spark plugs usually come pre-gapped, however.
Air if I remember correctly.
The gap is .035
.028 to .032 .028 to .032