# B4-LM NGK Standard Compact Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Standard Compact Spark Plug – Part Number: B4-LM**

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: 3410
-   Thread: 14 mm
-   Reach: 9.5 mm (3/8 in)
-   Hex: 20.8 mm (13/16 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.

-   Flo-Mow (TECUMSEH) – Lawnmower
-   Flymo (3.5HP TECUMSEH) – Lawnmower
-   Goodall (RIDING TRACTOR) – Lawnmower
-   Goodall – Lawnmower
-   Grazer (11HP B&S) – Lawnmower
-   Husqvarna (2HP & 3.5HP TECUMSEH) – Lawnmower
-   Husqvarna HVT52, HTV1200, HTV1500, HTV2000 – Lawnmower
-   Midland (4-STROKE) – Lawnmower
-   Milbrandt (14MM HEAD) – Lawnmower
-   Roof RIDING TRACTOR – Lawnmower
-   Snappin Turtle (14MM HEAD) – Lawnmower
-   Sterns (14MM HEAD) – Lawnmower
-   Sunbeam (ALL OTHER 14MM HEADS) – Lawnmower
-   Trim-All – Lawnmower
-   Goodall RAKE – Outdoor Power Equipment
-   Earth Drill PH980, PH980E (3HP TECUMSEH) – Outdoor Power Equipment
-   Hoffco PH980, PH980E (3HP 85cc TECUMSEH) – Outdoor Power Equipment
-   Hoffco PH1700A (98cc 3.5HP) – Outdoor Power Equipment
-   Hovering Trimmer HVT52, HTV1200, HTV1500, HTV2000 – Outdoor Power Equipment
-   Snow Thrower (JACOBSON 321) – Outdoor Power Equipment
-   Nylon Trimmer 85G – Outdoor Power Equipment
-   Snow Thrower 1026 – Outdoor Power Equipment
-   Jollyhoe 14MM HD – Outdoor Power Equipment
-   Modern EDGER-TRIMMER – Outdoor Power Equipment
-   Roloff VERSA-TOOL – Outdoor Power Equipment

That is the 25 most common of 40 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.

-   Bosch: 7803, W9E0, W9EC0, W9EO
-   Champion: 845, 845-1, 845S, J17LM
-   ACDelco: LM46, LM49, LM6
-   Autolite: 258, 258DP, 3666
-   DENSO: 6014, W14LM-U
-   Gator/Oregon: 77-301, 77-313
-   Motorcraft: A7CLM, A7LM
-   Torch: G4LC, GL4
-   John Deere: AM101194

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 13.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 13.00 AUD | In stock |

## Images

- B4-LM NGK spark plug
- B4-LM NGK spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/b4-lm-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03