Tempest URHM40E SPARK PLUG, MASSIVE, 3/4"-20

The **Tempest Massive Electrode Spark Plug (URHM40E)** is a **FAA-PMA approved aviation spark plug** designed to provide dependable ignition performance for compatible piston aircraft engines. Manufactured by Tempest, the spark plug offers a durable replacement for approved OEM applications while supporting consistent combustion, reliable engine operation, and long service life. Its massive electrode design combines a high-conductivity copper core with aviation-grade nickel electrodes, a proprietary fired-in resistor, and a corrosion-resistant nickel-plated shell. Engineered to resist fouling and maintain stable electrical performance, it is well suited to routine flight operations, flight training, and high-cycle general aviation environments. *Images are representative and may not show the exact product for sale.* --- ## Applications - **Replacement of approved aviation spark plugs** during scheduled maintenance - Suitable for **piston aircraft engine ignition systems** - Used for **engine servicing, overhaul, and routine inspections** - Ideal for **general aviation, flight training, and commercial operators** --- ## Why CJ Aerospace? CJ Aerospace supplies aviation ignition components with technical guidance and fast dispatch. - 🇦🇺 **Australian-owned & operated** - 📦 **Stocked locally for fast dispatch across Australia** - 🔧 **Technical support for installation and maintenance** - ✈️ **Trusted by MROs, operators, and aviation professionals** > ✉️ [Contact us sales@cjaerospace.com.au](mailto:sales@cjaerospace.com.au) > Need installation guidance or technical documentation? Contact CJ Aerospace for expert support.

- **Massive electrode design** provides dependable ignition performance - **High-conductivity copper core** promotes efficient heat transfer - **Fired-in resistor technology** delivers stable resistance and smooth engine operation - **Nickel-plated shell** improves corrosion and wear resistance - **Zero-leakage glass seal** helps contain combustion pressure - **Reduced fouling characteristics** support consistent engine performance