# BMR6A NGK Standard Compact Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Standard Compact Spark Plug – Part Number: BMR6A**

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: 7421
-   Thread: 14 mm
-   Reach: 9.5 mm (3/8 in)
-   Hex: 19 mm (3/4 in)
-   Seat: Gasket
-   Type: Compact

## 🚘 Application

Listed in NGK's application charts for lawn, garden and commercial equipment. The gap is not the same on all of them – the chart lists between 0.5 mm and 1.0 mm depending on the engine, so check the line for yours.

-   Hedge Trimmer TPH-2501/S/SS, TPH-250PF, TPH-260PF, TPH-230S/SS, TPH-270S/SS – Outdoor Power Equipment
-   Line Trimmer TBC-225, TBC-245, TBC-260, TBC2500 – Outdoor Power Equipment
-   Tanaka TBC-2501, TBC-270, TBC290, TBC340PF/D, TBC250PF/D – Outdoor Power Equipment
-   Homelite FP250 – Commercial Engine
-   Subaru-Robin EC13V – Commercial Engine

## 🔄 Supersession & Cross Reference

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

-   Autolite: 245, XST254DP, XST255DP
-   DENSO: 6022, 6025, W20MR-U
-   Champion: 840C, RCJ8
-   E3: E3.12, FF-12
-   ACDelco: CSR45
-   Briggs & Stratton: 293918
-   Gator/Oregon: 77-306
-   Kohler: 4113202S
-   Motorcraft: AR7N
-   Torch: L6RC

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 11.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 11.00 AUD | In stock |

## Images

- BMR6A NGK spark plug
- BMR6A NGK spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/bmr6a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03