# CR6HIX NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: CR6HIX**

Iridium NGK spark plugs offer a longer service life than a standard nickel-tipped spark plug: while nickel-alloy plugs offer a service life of roughly 20,000-40,000km, NGK Iridium IX spark plugs offer a service life of up to 60,000km, so fewer replacements are needed over time despite the higher initial cost.

Precious-metal spark plugs like the NGK Iridium IX also offer higher ignitability, achieved with an exposed fine-tip centre electrode that promotes superior flame growth compared with a standard spark plug. Iridium has a much higher melting point (2410°C) than nickel (1453°C), allowing the centre electrode diameter to be reduced from 2.5mm to 0.6mm – a smaller electrode mass that reduces the impedance to flame progress, helping acceleration, fuel consumption and idle quality.

## ⚙️ Key Features

-   Fine iridium-tipped centre electrode for a slow wear rate and stable idle
-   Longer service life than standard nickel plugs
-   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: 7274
-   Thread: 10 mm
-   Reach: 12.7 mm (1/2 in)
-   Hex: 16 mm (5/8 in)
-   Seat: Gasket
-   Terminal: Threaded stud

## 🚘 Application

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

-   Mariner 9.9 10mm Plug (9.9 HP, 2002-1995) – Outboard Engine
-   Mariner 8.0 BODENSEE (8 HP, 1999-1995) – Outboard Engine
-   Mercury 9.9 10mm Plug (9.9 HP, 1998-1995) – Outboard Engine
-   Mercury FOURSTROKE 9.9, 232CC, SERIAL 0H000058 AND 0H016909 (9.9 HP) – Outboard Engine
-   Mercury 8.0 BODENSEE (8 HP, 2006-1995) – Outboard Engine
-   Suzuki DF2.5 (2.5 HP) – Outboard Engine
-   Yamaha F9.9D (9.9 HP, 2005) – Outboard Engine
-   Yamaha F9.9ELR, MLH, MSH (9.9 HP, 2010-2006) – Outboard Engine
-   Yamaha T9.9D (9.9 HP, 2005) – Outboard Engine
-   Yamaha T9.9ELH, ELR, EXH (9.9 HP, 2010-2006) – Outboard Engine
-   Yamaha F9.9 (9 HP, 2004-1985) – Outboard Engine
-   Yamaha FT9.9 (9 HP, 2004-1985) – Outboard Engine
-   Yamaha T9.9 (9 HP, 2004-1985) – Outboard Engine
-   B.S.A. K1 BEAGLE (75) – Motorcycle
-   Baja BV250 (250) – Motorcycle
-   Diamo CRUISER (250) – Motorcycle
-   Diamo 100 DIRTBIKE (100) – Motorcycle
-   Honda CB250 - NIGHTHAWK (250, 2008-1991) – Motorcycle
-   Honda CMX250C - REBEL (250, 1987-1985) – Motorcycle
-   Honda CMX250C - REBEL (250, 2009-1996) – Motorcycle
-   Honda CMX250C2 (250, 2000-1999) – Motorcycle
-   Honda CMX250CD (250, 1986) – Motorcycle
-   Honda CRF100F (100, 2013) – Motorcycle
-   Honda CRF80F (80, 2013) – Motorcycle
-   Honda C70M (70, 1971-1970) – Motorcycle

That is the 25 most common of 91 applications NGK's charts list for this plug – ask us to check yours.

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 35.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 35.00 AUD | In stock |

## Images

- CR6HIX NGK iridium spark plug

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/cr6hix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03