• BU8H NGK spark plug
  • BU8H NGK spark plug firing end
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BU8H NGK Standard Spark Plug | Genuine NGK Spark Plug

BU8H NGK Standard Spark Plug | Genuine NGK Spark Plug

$18.00 AUD
$18.00 AUD
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✓ Authorised Volvo Penta Dealer · Marine & auto specialists · Ships Australia-wide

🔧 Product Description

NGK Standard Spark Plug – Part Number: BU8H

Spark plugs are a critical engine component, providing the spark that ignites the air-fuel mixture that drives an engine. NGK spark plugs feature trivalent plating – a silver/chrome-coloured finish on the threads – for corrosion resistance against moisture and chemicals, and are designed to meet or exceed OE standards.

⚙️ Key Features

  • Standard nickel centre electrode
  • Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
  • Corrugated ribs reduce the risk of flashover
  • Pure alumina silicate ceramic insulator, providing superior strength and better heat transfer
  • Copper core aids in heat removal
  • Triple seals prevent leakage

📏 Specifications

  • NGK stock number: 6431
  • Thread: 14 mm
  • Reach: 12.7 mm (1/2 in)
  • Hex: 20.8 mm (13/16 in)
  • Seat: Gasket
  • Terminal: Solid
  • Type: Surface Discharge

🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment.

  • Mariner 275 (275 HP, 1994-1991) – Outboard Engine
  • Mariner 2.5L EFI (265 HP, 1997) – Outboard Engine
  • Mariner 2.5L EFI (260 HP, 1998-1995) – Outboard Engine
  • Mariner 250 3.4L (250 HP, 1990-1989) – Outboard Engine
  • Mariner SUPER MAGNUM EFI (225 HP, 1999-1997) – Outboard Engine
  • Mariner 220 MAGNUM EFI (220 HP, 1988-1987) – Outboard Engine
  • Mariner 200 (200 HP, 1999-1979) – Outboard Engine
  • Mariner 200 EFI (200 HP, 1999-1998) – Outboard Engine
  • Mariner 200 MAGNUM EFI (200 HP, 1997-1989) – Outboard Engine
  • Mariner 200 SUPER MAGNUM EFI (200 HP, 1997) – Outboard Engine
  • Mariner 175 (175 HP, 1998-1978) – Outboard Engine
  • Mariner 175 EFI (175 HP, 1999-1998) – Outboard Engine
  • Mariner 175 MAGNUM EFI (175 HP, 1997-1991) – Outboard Engine
  • Mariner 175 SKI (175 HP, 1994-1989) – Outboard Engine
  • Mariner 150 (150 HP, 1999-1979) – Outboard Engine
  • Mariner 150 EFI (150 HP, 1999-1997) – Outboard Engine
  • Mariner 150 MAGNUM (150 HP) – Outboard Engine
  • Mariner 150 MAGNUM EFI (150 HP, 1997-1993) – Outboard Engine
  • Mariner 150 MAGNUM II (150 HP, 1991-1988) – Outboard Engine
  • Mariner 150 MAGNUM III (150 HP, 1997-1992) – Outboard Engine
  • Mariner 150 WORK (150 HP) – Outboard Engine
  • Mariner 140 JET (140 HP, 1999-1995) – Outboard Engine
  • Mariner 135 (135 HP, 1999-1986) – Outboard Engine
  • Mariner 135 MARATHON (135 HP, 1999-1986) – Outboard Engine
  • Mariner 135 WORK (135 HP, 1993-1986) – Outboard Engine

That is the 25 most common of 43 applications NGK's charts list for this plug – ask us to check yours.

🔄 Supersession & Cross Reference

NGK's cross-reference tables list this plug against these part numbers.

  • DENSO: 6038, SF24

📦 Condition

  • Brand new genuine product
  • Supplied in original packaging

Shipping & Delivery

Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.

Returns & Warranty

14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.

Not sure this fits?

Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.

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