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Marine & Outboard Spark Plugs

NGK Laser Platinum Spark Plug PZFR5F-11 (4363)

SKU: GB-PZFR5F-11

$30.90
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The NGK PZFR5F-11 (Stock No. 4363) is a Laser Platinum, double-platinum resistor spark plug designed for selected Mercury and Mariner OptiMax direct-fuel-injection two-stroke outboards. Its fine-wire platinum centre electrode, platinum ground electrode and projected firing end provide dependable ignition and long service life. It features an M14 × 1.25 thread, 19 mm reach, 16 mm hex and 1.1 mm nominal gap.

Key benefits

Key Benefits

  • - NGK Stock Number: 4363
  • - Laser Platinum construction
  • - Double-platinum electrode design
  • - Fine-wire centre electrode
  • - Copper-core centre electrode
  • - Built-in resistor
  • - Approximately 5 kΩ resistance
  • - Projected firing end
  • - M14 × 1.25 thread
  • - 19 mm / 0.750" reach
  • - 16 mm / 5/8" hex
  • - 1.1 mm / 0.043" preset gap
  • - NGK heat range 5
  • - Flat/gasket seat
  • - Developed for demanding ignition applications including selected OptiMax DFI engines.

Specifications & Dimensions

  • - Brand: NGK
  • - Part Number: PZFR5F-11
  • - NGK Stock Number: 4363
  • - Type: Laser Platinum
  • - Electrode Construction: Double Platinum
  • - Thread Diameter: 14 mm / 0.551"
  • - Thread: M14 × 1.25
  • - Thread Reach: 19 mm / 0.750"
  • - Hex / Spanner Size: 16 mm / 5/8"
  • - Preset Gap: 1.1 mm / 0.043–0.044"
  • - NGK Heat Range: 5
  • - Seat: Gasket
  • - Resistor: Yes
  • - Approx. Resistance: 5,000 Ω
  • - Centre Electrode: Fine-wire platinum
  • - Centre Electrode Core: Copper
  • - Ground Electrode: Platinum
  • - Centre Electrode Projection: Long/projected
  • - Washer: Included

Compatible Outboard Motors

  • Mercury
  • - 115 HP OptiMax — 2000–2002
  • - 135 HP OptiMax DFI — 1996–2001
  • - 150 HP OptiMax DFI — 1996–2002
  • - 175 HP OptiMax DFI — 2001–2002
  • - 200 HP OptiMax — 1996–2002
  • - 200 HP OptiMax XS — 2002–2004
  • - Selected 225 HP OptiMax — verify exact year/serial range

Mariner

  • - 115 HP OptiMax — 2000–2004
  • - 135 HP OptiMax — 1998–2002
  • - 150 HP OptiMax — 1997–2002
  • - 200 HP OptiMax — 1997–2004
  • - 225 HP OptiMax — 1998–2004

Cross-Reference / Related Part Numbers

  • - NGK: PZFR5F-11
  • - NGK Stock No.: 4363

Signs the Spark Plug Needs Replacing

  • - Difficult starting
  • - Rough idle
  • - Engine misfire
  • - Hesitation under acceleration
  • - Reduced power
  • - Poor high-RPM performance
  • - Increased fuel consumption
  • - Carbon fouling
  • - Fuel or oil fouling
  • - Excessive electrode wear
  • - Enlarged electrode gap
  • - Corrosion
  • - Cracked ceramic insulator
  • - Damaged sealing washer

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