This listing is about one (1) NGK Spark Plug for the following TANAKA outboard engines, which replaces OEM Part #018-00502-21:

• 1.2 hp - TOB 12 (1972-1989)
  
• 1.2 hp - TOB 120 (1981-1998)
  
• 1.75 hp - TOB 175 (1981-1990)
  
• 3.0 hp - TOB 300 (1981-1999)