The 1998 model, Yamaha 250 hp outboard, requires an NGK BR9HS-10 spark plug, gapped to .039 in.
The 1998 model, 115 hp Yamaha outboard, requires an NGK BR8HS-10 spark plug, gapped to .039 in.
.032
The dry weight of a 1998 model, 200 hp Yamaha outboard is 419 lbs.
100:1
50:1
.030 gap
0.031 to 0.035"
o.39 in
A 1998 150 Yamaha outboard motor typically weighs around 410-450 pounds. However, the exact weight can vary based on additional features or modifications.
What is proper oil to gas ratio for a 1998 50hp Evenrude outboard
The 1998 model, 60 hp Johnson outboard runs a plug gap of .030 in.
65 degrees