Autolite 4121 Nickel Spark Plug

Traditional nickel electrodes. Copper core improves resistance to fouling. Power tip extends further into the combustion chamber to aid in self-cleaning, reducing fouling at low rpms and pre-ignition at high speeds.

• Shell
• Thread Diameter14mm
• Thread Pitch1.25mm
• Seat TypeGasket
• Reach12.7mm (1/2")
• Hex Size13/16" (21mm)
• Terminal TypeSolid
• Gap.031" (0.8mm)

• Center Electrode
• MaterialNickel
• TypeStandard
• Size2.5mm
• ProjectionProjected

• Ground Electrode
• MaterialNickel
• TypeStandard
• Quantity1

• Specifications
• ResistorYes
• Heat Range2
• Torque SpecsCast Iron: 26-29 lb. ft. Aluminum: 15-22 lb. ft.

• Part Information
• BrandAutolite
• Warranty2 Years
• Longevity30k Miles

Verify Fitment

Vehicle Body Vehicle Engine Verify

Shop Parts For This Vehicle

×

×

Automotive

Sorry, no automotive applications are associated with this part.

Powersports

• 2011
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 2010
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 2009
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 2008
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 2007
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 2006
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 2005
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 2004
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 2003
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 2002
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 2001
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 2000
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 1999
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 1998
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 1997
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 1996
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 1995
  • Yamaha
    • SJ700 Super Jet Base Verify fitment
• 1994
  • Yamaha
    • SJ700 Super Jet Base Verify fitment

Marine

• Outboard
  • Mariner
    • 135 V-6 Verify fitment
    • 2-Cyl. Verify fitment
    • 2-Cyl. (Export) Verify fitment
    • 2-Cyl. 20 Jet Verify fitment
    • 2-Cyl. 25 Verify fitment
    • 2-Cyl. 30 Jet Verify fitment
    • 2-Cyl. 30, Marathon 30 (Export) Verify fitment
    • 2-Cyl. 40, Marathon 40 (Export) Verify fitment
    • 2-Cyl. Magnum, Marathon (Export) Verify fitment
    • 2-Cyl. Marathon (Export) Verify fitment
    • 2-Cyl. Marathon 15 (Export) Verify fitment
    • 2-Cyl. Marathon 25 (Export) Verify fitment
    • 3-Cyl. (Export) Verify fitment
    • 3-Cyl. 45 Jet Verify fitment
    • 3-Cyl. 60 Big Foot (Export) Verify fitment
    • 3-Cyl. Marathon (Export) Verify fitment
    • 3-Cyl. Marathon 55 (Export) Verify fitment
    • 3-Cyl. Marathon 69 (Export) Verify fitment
    • 4-Cyl. Verify fitment
    • 4-Cyl. (Export) Verify fitment
    • 4-Cyl. 80 Jet Verify fitment
    • 9.9 hp Verify fitment
    • Magnum EFI V-6, 175 SKI (Export) Verify fitment
    • Magnum EFI V-6, II, III (Export) Verify fitment
    • Magnum EFI V-6, V200 (Export) Verify fitment
    • Super Magnum EFI V-6 Verify fitment
    • V-6, V150, W150 (Export) Verify fitment
  • Mercury
    • Merc Series with Thunderbolt Ignition Verify fitment