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Marine & Outboard Spark Plugs

NGK Nickel Spark Plug CR6HSA (2983)

SKU: GB-CR6HSA

$8.80
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The NGK CR6HSA (Stock No. 2983) is a compact resistor spark plug used in selected Suzuki and Yamaha 4-stroke outboard motors. Featuring a nickel centre electrode, copper core and 5 kΩ resistor, it provides dependable ignition while helping suppress electrical interference. Its 10 mm thread, 12.7 mm reach and 16 mm hex suit small marine engines specifically designed for CR6HSA.

Key benefits

Key Benefits

  • - Standard NGK resistor spark plug
  • - Suitable for selected Suzuki and Yamaha 4-stroke outboards
  • - Copper-core centre electrode for efficient heat transfer
  • - Nickel centre and ground electrodes
  • - 5 kΩ resistor for electrical-noise suppression
  • - Compact M10 × 1.0 thread
  • - 12.7 mm / ½" reach
  • - NGK heat range 6
  • - Flat gasket seat
  • - Standard J-gap electrode design

Specifications & Dimensions

  • - Brand: NGK
  • - Part Number: CR6HSA
  • - NGK Stock Number: 2983
  • - Spark Plug Type: Standard resistor
  • - Thread Diameter: 10 mm / 0.394"
  • - Thread Size: M10 × 1.0
  • - Thread Pitch: 1.0 mm / 0.039"
  • - Thread Reach: 12.7 mm / 0.500"
  • - Hex / Spanner Size: 16 mm / 5/8"
  • - Factory Gap: 0.7 mm / 0.028"
  • - NGK Heat Range: 6
  • - Seat Type: Flat / gasket
  • - Resistor: Yes – approximately 5 kΩ
  • - Centre Electrode Material: Nickel
  • - Centre Electrode Core: Copper
  • - Centre Electrode Type: Standard, non-projected
  • - Ground Electrode: Nickel
  • - Ground Electrode Type: Standard J-gap
  • - Number of Ground Electrodes: 1
  • - Terminal: Threaded stud
  • - Sealing Washer: Yes

Compatible Outboard Motors

  • Suzuki Outboards
  • - Suzuki DF2.5 – 2.5 HP 4-stroke
  • - Suzuki DF2.5 – 2006–2009

Yamaha Outboards

  • - Yamaha F9.9D – 9.9 HP 4-stroke
  • - Yamaha F9.9ELR
  • - Yamaha F9.9MLH
  • - Yamaha F9.9MSH
  • - Yamaha T9.9D
  • - Yamaha T9.9ELH
  • - Yamaha T9.9ELR
  • - Yamaha T9.9EXH

Cross-Reference / OEM Part Numbers

  • - NGK: CR6HSA
  • - NGK Stock No.: 2983
  • - Suzuki: 09482-00406
  • - Yamaha: 94701-00282
  • - Yamaha: 94701-00372-00
  • - Yamaha: 90793-20132

Important Fitment Information

  • CR6HSA has a 10 mm thread, so it should not be confused with the common 14 mm B-series outboard plugs.
  • Also distinguish
  • - CR6HSA – NGK heat range 6
  • - CR4HSB – NGK heat range 4
  • - CR5HSB – different heat range/application
  • - CR6HS – related but not automatically interchangeable
  • - CR6HSA-9 – different factory-gap specification
  • The CR6HSA itself is supplied at approximately 0.7 mm / 0.028", but the engine manufacturer's specified gap should always take priority.

Signs the Spark Plug Needs Replacing

  • - Difficult starting
  • - Rough or unstable idle
  • - Engine misfire
  • - Hesitation under acceleration
  • - Reduced engine performance
  • - Increased fuel consumption
  • - Carbon deposits
  • - Fuel or oil fouling
  • - Excessive electrode wear
  • - Corrosion
  • - Cracked ceramic insulator

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