Kawasaki KE 100 B - 2001 - 20 - 106561. Kawasaki KE 100 B - 2000 - 19 - 106560. Kawasaki KE 100 B - 1999 - 18 - 106559. Kawasaki KE 100 B - 1998 - 17 - 106558. Kawasaki KE 100 B - 1997 - 16 - 106557. Kawasaki KE 100 B - 1996 - 15 - 106556.
NGK plugs last forever, always reliable. I haven't changed the plugs in my watercraft for over 8 years, still starts up and runs great but I figure it's probably time to put in a new set.