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TEMPEST SPARK PLUG URHM40E
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Overview
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MASSIVE ELECTRODE 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. |
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WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. |
Application Guide
- Application Guide (PDF)
Reviews
My rating is likewise Five Stars. Very satisfied with the product and fine service.
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TEMPEST PLUG URHM40E 12PK
So far real good
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TEMPEST PLUG URHM40E 12PK
As expected. Immediate engine run improvement
Verified Purchase
TEMPEST PLUG URHM40E 12PK
Love Tempest. Been using them for years with flawless results. Aircraft Spruce shipped them very quickly
Verified Purchase
TEMPEST PLUG URHM40E 12PK
Love Tempest. Been using them for years with flawless results. Aircraft Spruce shipped them very quickly
Verified Purchase
TEMPEST PLUG URHM40E 12PK
Verified Purchase
TEMPEST SPARK PLUG URHM40E
Arrived on time and fixed the problem!!!!!!
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TEMPEST PLUG URHM40E 12PK
Works as advertised
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TEMPEST SPARK PLUG URHM40E
As expected
Verified Purchase
TEMPEST PLUG URHM40E 12PK
As good as the original Champion plugs I have used for decades but much cheaper.
Verified Purchase
TEMPEST PLUG URHM40E 12PK
Q&A
Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
Yes, the plugs will include the gasket.
The higher the number the higher the heat rating position will be. so the UREM40E vs. UREM38E, the 40E will be the hotter plug because 40 is larger than 38. Hot plugs have relatively long insulator noses and, therefore, a long heat transfer path. Cold plugs have relatively short noses that thus transfer heat more quickly.
Tempest does not have a replacement for an REL37B spark plug.
Yes, all Tempest plugs are all FAA PMA approved. There is a slip inside the spark plug sleeve that says they are FAA PMA approved. Each plug is also stamped with FAA PMA.
The H and the E refer to the barrel style. H prefix is shielded 3/4-20 thread and the E prefix is 5/8-24 thread.
"E" designates 5/8"-24. "H" designates 3/4"-20.
5/8"-24: UREB37E, UREM37BY, UREM38E, UREM40E, UREB36S, UREM38S
3/4"-20: URHB32E, URHB37E, URHM38E, URHM40E, URHB32S, URHB36S, URHM38S
The equivalent is the URHB37E. For singles, use part # 08-00247, ad for 12 pack use part # 08-00247-12.
The UREM38S is the fine wire replacement for the REM40E. There is no UREM40S plug.
Part number URHM38S would be the Temepst fine wire replacement.
Yes, massive plugs are gapped .016 to .021 & fine wire are gapped .017 to .021.
