# DCPR7EIX NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: DCPR7EIX**

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: 6046
-   Thread: 12 mm
-   Reach: 19 mm (3/4 in)
-   Hex: 16 mm (5/8 in)
-   Seat: Gasket
-   Type: Projected

## 🚘 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.

-   Evinrude 4-STROKE DOHC 815CC (50 HP, 2003-1999) – Outboard Engine
-   Evinrude (40 HP, 2003-1999) – Outboard Engine
-   Evinrude (30 HP, 2003-2000) – Outboard Engine
-   Evinrude 4-STROKE (25 HP, 2001-2000) – Outboard Engine
-   Evinrude 4-STROKE OHC 305CC (15 HP, 2003-1995) – Outboard Engine
-   Evinrude 4-STROKE OHC 302CC (9.9 HP, 2003-2002) – Outboard Engine
-   Evinrude 4-STROKE OHC 305CC (9.9 HP, 2003-1995) – Outboard Engine
-   Johnson (40 HP, 2003-2002) – Outboard Engine
-   Johnson 12mm Plug (30 HP, 2003-1995) – Outboard Engine
-   Johnson 4-STROKE OHC (15 HP, 2003-1995) – Outboard Engine
-   Johnson 12mm Plug (9.9 HP, 2004-1995) – Outboard Engine
-   Mercury FOURSTROKE 60,BIGFOOT, SEAPRO, FORMULA 60, 4-CYL EFI (60 HP) – Outboard Engine
-   Mercury FOURSTROKE 50, BIGFOOT, 4-CYL EFI (50 HP) – Outboard Engine
-   Mercury FOURSTROKE 40, BIGFOOT, 3-CYL EFI (40 HP) – Outboard Engine
-   Mercury FOURSTROKE 40, JET, SEAPRO, 4-CYL EFI (40 HP) – Outboard Engine
-   Mercury FOURSTROKE 30, 3-CYL EFI (30 HP) – Outboard Engine
-   American Iron Horse LSC (2034, 2007-2006) – Motorcycle
-   American Iron Horse OUTLAW SY (2034, 2007-2006) – Motorcycle
-   American Iron Horse TEJAS SJ (2034, 2007-2006) – Motorcycle
-   American Iron Horse TEXAS CHOPPER SX - 10TH ANNIVERSARY SPECIAL EDITION (2034, 2007-2006) – Motorcycle
-   American Iron Horse LEGEND SC (2033, 2004-2003) – Motorcycle
-   American Iron Horse OUTLAW SY (2033, 2004-2003) – Motorcycle
-   American Iron Horse RANGER T SG (2033, 2003) – Motorcycle
-   American Iron Horse SLAMMER SZ (2033, 2004-2003) – Motorcycle
-   American Iron Horse STALKER SR (2033, 2004-2003) – Motorcycle

That is the 25 most common of 234 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: 3233, 3242, 3271, 5308, 5608, IXU22, IXU22C, VXU22 and 4 more
-   Harley Davidson/Screamin' Eagle: 31600106, 32192-10, 32320-91, EX12S, HD6R12
-   Harley-Davidson: 31600106, 32192-10, 32320-91, EX12S, HD6R12
-   Accel: Y2418P
-   Champion: 9700
-   Torch: DK7RTP

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 40.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 40.00 AUD | In stock |

## Images

- DCPR7EIX NGK iridium spark plug
- DCPR7EIX NGK iridium spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/dcpr7eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03