RHM38S Iridium Electrode Spark Plug, 3/4-20 ThreadA new industry standard, the Tempest Aviation Spark Plug
Manufactured with the most automated manufacturing processes, this is the most innovative spark plug in the aviation industry.
Durable Fine Wire Iridium Center Electrode
for longer spark plug life.
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.
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.
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).
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.
intense pressure and heat create positive, zero-leakage, shrunk in seal between insulator and shell to contain the hot, high pressure combustion cycle gases.
environmentally preferable electrolytic nickel provides outstanding durable finish, superior corrosion protection, and extreme wear resistance.
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
Important Ordering and Installation Information
Aircraft Spark Plug Maintenance
- No COD's on Spark Plugs.
- All spark plugs come in factory sealed tube containers.
- Please check plug application before opening!
- We cannot accept returns on opened or installed plugs.
It is normally recommended that spark plug gaps and deposit conditions be checked at 50 hour intervals. In addition, removal time specifications are usually available from the manufacturer and may be supplemented by past experience with a particular engine model.
Checking spark plug gaps and deposits at appropriate regular intervals is crucial to preventing engine misfires.
Aircraft Spark Plug Gaskets
Aviation Spark Plug Gaskets are manufactured to precise dimensions and material standards, based on the effective reach of a spark plug as determined by its installed thickness. An ideal installation has the firing end of the plug flush with the combustion chamber wall with no exposed threads on the plug or the cylinder bushing. Exposed threads can become hot spots initiating preignition. Use and installation of proper gaskets are essential to reliable engine operation. Double gasketting a spark plug or use of non-standard thin gaskets will expose threads, contributing to engine-damaging preignition. Use new copper gaskets to ensure a tight, gas-sealed spark plug