This listing is about one (1) NGK Spark Plug for the following MERCURY outboard engines, which replaces OEM Part #827 858 Q:

• 9.9 hp - 4 Stroke (1999-2002)
  
• 15 hp - 4 Stroke Bigfoot 323cc (1998-2006)
  
• 25 hp - 4 Stroke (1998-2001)
  
• 30 hp - 2 cyl. 4 Stroke (1999-2002)
  
• 30 hp - 30 EFI 526cc (1999-2011)
  
• 40 hp - 3 cyl. 4 Stroke (1998-2002)
  
• 40 hp - 4 cyl. 4 Stroke Big Foot (2001-2006)
  
• 45 hp - Bodensee 4 cyl. 4 Stroke (1995-2002)
  
• 50 hp - 4 cyl. 4 Stroke Bigfoot (1995-2001)
  
• 60 hp - 4 cyl. 4 Stroke (after 2001)