# LFR4A-E NGK STD V-Groove Resistor Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK STD V-Groove Resistor Spark Plug – Part Number: LFR4A-E**

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: 6499
-   Thread: 14 mm
-   Reach: 26.5 mm (1.04 in)
-   Hex: 16 mm (5/8 in)
-   Seat: Gasket
-   Terminal: Solid
-   Type: Projected

## 🚘 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.

-   Mercury FOURSTROKE 115, 1.7L, SERIAL 1B366823-2B094995 (115 HP) – Outboard Engine
-   Mercury FOURSTROKE 100, 1.7L, SERIAL 1B366823 AND UP (100 HP) – Outboard Engine
-   Mercury FOURSTROKE 90, 1.7L, SERIAL 1B366823 AND UP (90 HP) – Outboard Engine
-   Mercury FOURSTROKE 80, 1.7L, SERIAL 1B366823 AND UP (80 HP) – Outboard Engine
-   Mercury FOURSTROKE 75, 1.7L, SERIAL 1B366823 AND UP (75 HP) – Outboard Engine

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 38.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 38.00 AUD | In stock |

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/lfr4a-e-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03