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TEMPEST XL IRIDIUM FINE WIRE SPARK PLUG URHM38S

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Overview

FINE WIRE SPARK PLUG

Aviation Spark Plug With the most automated manufacturing processes and the most innovative spark plug in the aviation industry. Made in USA.

High Conductivity Copper Core Center Electrode copper, co-extruded inside a nickel alloy sleeve ensures outstanding heat and electrical conductivity while the nickel sleeve offers high resistance to corrosive combustion gases.

High Alumina Ceramic Insulator high mechanical strength, superior dielectric properties, proprietary protective glaze, provides high performance to conquer severe operational conditions. "Clean Collar" massive electrode "V" tip focuses heat to reduce fouling and enhance heat range control.

Proprietary Glass Center Seal 21st century 'fired in' resistor replaces the multipart screw, spring, carbon pile stack up used in competitive plugs and known to suffer from resistance value instability that can cause misfires, wasted fuel, engine roughness.

Nickel Finish environmentally preferable electrolytic nickel provides outstanding durable finish, superior corrosion protection, and extreme wear resistance.

Nickel Ground Electrodes aviation grade nickel electrode design focuses on minimizing sparking voltage requirements while maintaining specification gaps to ensure large, stable 'flame kernels' for on-time ignition and complete combustion.

Vacuum Infused Center Electrode proprietary, vacuum infusion process seals electrode/insulator gap providing stable heat range and superior center electrode cooling (heat flow to the insulator).

Hot-Lock Assembly intense pressure and heat create positive, zero-leakage, shrunk in seal between insulator and shell to contain the hot, high pressure combustion cycle gases.

Harness Wire Contact smooth, uninterrupted, oxide treated spring contact surface offers enhanced corrosion resistance, is chemically bonded to the fired-in resistor providing the ultimate harness/spark plug termination integrity and energy transfer.

Application Guide

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Q&A

Q: Do I need 18mm or 14mm gaskets for this Tempest Spark Plug (URHM38S XL)?

The Tempest Fine Wire URHM38S XL spark plug uses an 18mm gasket.

Q: What is the difference between the Tempest URHM38S and the URHM38S XL designation?

There is no difference. They are one and the same.

Q: I currently have Champion REM38E plugs on Lycoming )360 A4M and would like to get Tempest fine wire plugs, which model would fit?

The correct fine wire model to replace the REM38E plugs is the UREM38S.

Q: i have a pa-28-180 o360 a4a and use urhm38e what fine wire tempest plug should i order?

URHM38S would be the replacement fine wires for the URHM38E massive plugs.

Q: I have RHM40E, is the URHM38S XL the correct replacement?

RHM38E would be an equivalent to the URHM40E. The only difference is the 38 has the lower heat rating position.The URHM38S is a fine wire plug. The RHM40E is a massive plug.

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