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Marine & Outboard Spark Plugs

NGK Nickel Spark Plug BPR6HS-10 (2633)

SKU: GB-BPR6HS-10

$8.80
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The NGK BPR6HS-10 (Stock No. 2633) is a resistor-type spark plug widely used in selected small 2-stroke outboard motors. Featuring a projected nickel centre electrode, copper-core construction and 1.0 mm factory gap, it provides dependable ignition, efficient heat transfer and reduced electrical interference. It is a verified fit for selected Tohatsu, Mercury and Mariner outboards where BPR6HS-10 is specified.

Key benefits

Key Benefits

  • - Standard NGK nickel spark plug
  • - Copper-core construction for efficient heat transfer
  • - Built-in resistor helps suppress electrical interference
  • - Projected centre electrode
  • - Factory 1.0 mm / 0.040" gap
  • - Short 12.7 mm thread reach
  • - Flat gasket/washer seat
  • - NGK heat range 6
  • - Particularly suited to selected small 2-stroke outboards

Specifications & Dimensions

  • - Brand: NGK
  • - Part Number: BPR6HS-10
  • - NGK Stock Number: 2633
  • - Spark Plug Type: Standard resistor
  • - Thread Diameter: 14 mm / 0.551"
  • - Thread Size: M14 × 1.25
  • - Thread Pitch: 1.25 mm / 0.049"
  • - Thread Reach: 12.7 mm / 0.500"
  • - Hex / Spanner Size: 20.8 mm / 13/16"
  • - Factory Spark Gap: 1.0 mm / 0.040"
  • - NGK Heat Range: 6
  • - Seat Type: Flat / gasket seat
  • - Resistor: Yes
  • - Centre Electrode: Nickel
  • - Centre Electrode Core: Copper
  • - Electrode Type: Projected
  • - Ground Electrode: Nickel
  • - Number of Ground Electrodes: 1
  • - Sealing Washer: Yes

Compatible Outboard Motors

  • Tohatsu Outboards
  • - Tohatsu M2.5B2 – 2.5 HP – 2-stroke – 1991–2017
  • - Tohatsu M3.5A – 3.5 HP – 2-stroke – 1991–2017
  • - Tohatsu M3.5A2 – 3.5 HP – 2-stroke – 1991 onwards

Mercury Outboards

  • - Mercury 2.2 HP – 2-stroke – 1984–1994
  • - Mercury 2.2 HP – serial 8075603 and up
  • - Mercury 2.5 HP – serial 0A855097 and up
  • - Mercury 2.5 HP – selected 2006-on applications
  • - Mercury 3 HP – serial 0A855097 to 0G710612
  • - Mercury 3.3 HP – serial 0D901217 and up
  • - Mercury 3.3 HP – 1993–2006
  • - Mercury 3.5 HP – serial 6202173 and up

Mariner Outboards

  • - Mariner 2.5 HP – 1990–2002
  • - Selected equivalent small Mariner 2-stroke applications specifying BPR6HS-10

Cross-Reference Spark Plugs & Part Numbers

  • - NGK: BPR6HS-10
  • - NGK Stock Number: 2633
  • - Mercury / Mariner: 33-19796
  • - Mercury: 19796
  • - NGK non-resistor equivalent family: BP6HS-10
  • - Mercury non-resistor: 33-12127
  • - Champion: RL87YC – used as an alternative in Mercury application listings

Signs the Spark Plug Needs Replacing

  • - Difficult starting
  • - Rough or unstable idle
  • - Engine misfiring
  • - Hesitation under acceleration
  • - Reduced engine power
  • - Increased fuel consumption
  • - Carbon deposits
  • - Oil fouling
  • - Excessive electrode wear
  • - Corrosion
  • - Cracked or damaged ceramic insulation

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