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Marine & Outboard Spark Plugs

NGK Nickel Spark Plug CR4HSB (4695)

SKU: GB-CR4HSB

$8.80
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The NGK CR4HSB (Stock No. 4695) is a compact resistor spark plug used in selected small Honda 4-stroke outboard motors and other small engines. Featuring a nickel centre electrode, copper-core construction and built-in resistor, it provides reliable ignition while reducing electrical interference. Its 10 mm thread, 12.7 mm reach and 16 mm hex make it suitable for engines specifically designed for CR4HSB.

Key benefits

Key Benefits

  • - Standard NGK resistor spark plug
  • - Particularly suited to selected Honda 4-stroke outboards
  • - Copper-core construction for efficient heat transfer
  • - Nickel centre electrode
  • - Built-in resistor helps suppress electrical interference
  • - Compact 10 mm thread
  • - Short 12.7 mm reach
  • - NGK heat range 4
  • - Gasket-seat construction
  • - Suitable for marine service where CR4HSB is specified

Specifications & Dimensions

  • - Brand: NGK
  • - Part Number: CR4HSB
  • - NGK Stock Number: 4695
  • - 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"
  • - NGK Heat Range: 4
  • - Spark Gap: 0.6–0.7 mm / 0.024–0.028", depending on engine specification
  • - Seat Type: Flat / gasket seat
  • - Resistor: Yes
  • - Centre Electrode: Nickel
  • - Centre Electrode Core: Copper
  • - Ground Electrode: Nickel
  • - Ground Electrodes: 1
  • - Sealing Washer: Yes

Compatible Outboard Motors

  • Honda Outboards
  • - Honda BF2 – 2 HP
  • - Honda BF2A – 2 HP
  • - Honda BF2D – 2 HP
  • - Honda BF2.3 – 2.3 HP
  • - Honda BF2.3D – 2.3 HP
  • These are small single-cylinder, air-cooled Honda 4-stroke outboards. Model/year and the owner's manual specification should still be checked because Honda has produced these engines in numerous regional versions.

Honda BF2 / BF2.3 Application

  • For the common Honda BF2/BF2.3 family
  • - Engine: Single-cylinder 4-stroke
  • - Cooling: Air cooled
  • - Specified plug family: NGK CR4HSB
  • - Thread: M10 × 1.0
  • - Reach: 12.7 mm
  • - Typical specified electrode gap: approximately 0.6–0.7 mm
  • This makes CR4HSB quite different dimensionally from the 14 mm marine plugs such as BPR6HS-10 and BPR7HS.

Cross-Reference Spark Plugs & Part Numbers

  • - NGK: CR4HSB
  • - NGK Stock No.: 4695
  • - Honda: 98056-54777
  • - Honda: 98056-54757
  • - Champion: PZ7HC

Important Fitment Information

  • The CR4HSB uses a 10 mm thread, not the more common 14 mm thread found on many 2-stroke outboard spark plugs.
  • Before installation, confirm
  • - Engine model
  • - Model suffix
  • - Serial number/year where applicable
  • - 10 mm thread
  • - 12.7 mm reach
  • - Required electrode gap
  • Do not substitute CR5HSB, CR5HS, CR4HSA or another similar-looking 10 mm plug purely because the physical dimensions appear similar. The heat range and electrode configuration can differ.

Signs the Spark Plug Needs Replacing

  • - Difficult cold starting
  • - Increased number of starter pulls
  • - Rough idle
  • - Engine misfire
  • - Hesitation under load
  • - Reduced engine power
  • - Excessive carbon deposits
  • - Oil fouling
  • - Worn electrodes
  • - Corrosion around the plug
  • - Cracked or damaged ceramic insulator

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