1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 196Get this manual

Quality of the image is intentionally reduced!

IGNITION SYSTEM
Inspection
1 Inspect each spark plug for manufacturer and spark plug numberAll plugs must be from the same manufacturer and have the same spark plug numberRefer to"Specific

• • TGB
  • Arctic Cat
  • Bombardier
  • Can Am
  • Honda
  • John Deer
  • Kawasaki
  • Polaris
  • Suzuki
  • Yamaha
• • Kawasaki
• • Chrysler
  • Honda
  • Johnson Evinrude
  • Mercury
  • Suzuki
  • Tohatsu
  • Yamaha
• • Honda
  • Polaris
  • Sea Doo
  • Yamaha
• • Arctic Cat
  • Polaris
  • Ski Doo
  • Yamaha
• • Chrysler
  • Mercury
  • OMC
  • Volvo