# AR6FS NGK Standard Resistor Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Standard Resistor Spark Plug – Part Number: AR6FS**

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: 3323
-   Thread: 18 mm
-   Reach: .460"
-   Hex: 20.8 mm (13/16 in)
-   Seat: Tapered
-   Terminal: Solid

## 🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment and lawn, garden and commercial equipment and automotive vehicles. 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.

-   Berkeley FORD (302 CID, 18MM HDS., 1977-1974) – Inboard Engine
-   Berkeley FORD (351 CID, 18MM HDS., 1977-1974) – Inboard Engine
-   Crusader (302 CID, 1975-1974) – Inboard Engine
-   Crusader 255 (351 CID, 1975-1974) – Inboard Engine
-   Indmar FORD 5.8L V8 (351 CID, 1987-1983) – Inboard Engine
-   Mercruiser 215 (8 CYL FORD SMALL BLOCK) – Inboard Engine
-   Mercruiser 225 (8 CYL FORD SMALL BLOCK) – Inboard Engine
-   Mercruiser 233 (8 CYL FORD SMALL BLOCK, 18MM HDS.) – Inboard Engine
-   Mercruiser 255 (8 CYL FORD SMALL BLOCK, FROM 4175499 18MM HDS.) – Inboard Engine
-   Mercruiser 888 (8 CYL FORD SMALL BLOCK, TO) – Inboard Engine
-   Mercruiser 888 (8 CYL FORD SMALL BLOCK, FROM 4169597 18MM HDS.) – Inboard Engine
-   Omc (1974) – Inboard Engine
-   Volvo-Penta AQ190A – Inboard Engine
-   Hobart (FORD 200 ci) – Lighting Plants and Generator
-   Ford (200, 240, 250, 262, 292 CU IN) – Commercial Engine
-   Ford (300, 330, 332, 361 CU IN) – Commercial Engine
-   Ford (391, 401, 477, 534 CU IN) – Commercial Engine
-   Other (1975-1978) (200 CU IN.) – Farm Equipment
-   Other (1975-1978) (250 CU IN.) – Farm Equipment
-   Other (1975-1978) (300 CU IN.) – Farm Equipment
-   Other (1975-1978) (361 CU IN.) – Farm Equipment
-   Other (1975-1978) (391 CU IN.) – Farm Equipment
-   Ford (1975-1978) (477 CU IN.) – Farm Equipment
-   Bale Wagon (FORD 361 CU IN.) – Farm Equipment
-   Combine (FORD 361 CU IN.) – Farm Equipment

That is the 25 most common of 69 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.

-   Motorcraft: BRF31, BRF31-4, BRF314, BRF3M, BRF6, BSF3, BSF31, BSF31-4 and 2 more
-   DENSO: 5012, 5013, 5014, 5015, MA20P-U, MA20PR-U, MA20R-U, MA20R-U11
-   Autolite: 124, 127, 3404, 344, 584, 784, 804
-   ACDelco: CR83T, R83CT, R83T, R85T, R86T
-   Champion: 129, 129S, RF10, RF10C

## 📦 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

- AR6FS NGK spark plug

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/ar6fs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03