# B7HS-10 NGK Standard Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Standard Spark Plug – Part Number: B7HS-10**

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: 2129
-   Thread: 14 mm
-   Reach: 12.7 mm (1/2 in)
-   Hex: 20.8 mm (13/16 in)
-   Seat: Gasket
-   Type: Wide Gap

## 🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment. The chart shows a 1.0 mm gap for these engines, but check it against your engine's manual before fitting.

-   Evinrude (75 HP, 1988-1975) – Outboard Engine
-   Mariner 15 MARATHON 684 (15 HP) – Outboard Engine
-   Mariner 15C 684 (15 HP) – Outboard Engine
-   Mariner K15 6K4 (15 HP, 2000-1984) – Outboard Engine
-   Mariner K15 6M7 (15 HP) – Outboard Engine
-   Mariner W15 684 (15 HP) – Outboard Engine
-   Mariner 9.9C 682 (9.9 HP) – Outboard Engine
-   Mariner 8C 6G1 (8 HP) – Outboard Engine
-   Mariner 6C 6H8 (6 HP) – Outboard Engine
-   Mariner 6D 6H6 (6 HP) – Outboard Engine
-   Nissan NS 40C (40 HP, 1992-1985) – Outboard Engine
-   Nissan NS 40D (40 HP, 1996-1991) – Outboard Engine
-   Nissan NS 40D2 (40 HP) – Outboard Engine
-   Nissan NS 35C (35 HP, 1995-1994) – Outboard Engine
-   Nissan NS 30A (30 HP, 1996-1986) – Outboard Engine
-   Nissan NS 30A4 (30 HP) – Outboard Engine
-   Nissan NS 25 (25 HP, 1996-1986) – Outboard Engine
-   Nissan NS 25C3 (25 HP) – Outboard Engine
-   Nissan NS 18 (18 HP, 1996-1993) – Outboard Engine
-   Nissan NS 18C (18 HP, 1992-1985) – Outboard Engine
-   Nissan NS 18C (18 HP, 2007-2004) – Outboard Engine
-   Nissan NS 18D (18 HP, 2008-2004) – Outboard Engine
-   Nissan NS 18E2 (18 HP) – Outboard Engine
-   Nissan NS 15B (15 HP, 1992-1985) – Outboard Engine
-   Nissan NS 15C (15 HP, 2008-2004) – Outboard Engine

That is the 25 most common of 80 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.

-   Champion: 821, 821-1, 821M, 821S, L77J4, L77JC4

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 10.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 10.00 AUD | In stock |

## Images

- B7HS-10 NGK spark plug
- B7HS-10 NGK spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/b7hs-10-ngk-standard-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03