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Tempest Fine Wire Spark Plug URHM38S
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Overview
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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. |
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WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. |
Application Guide
- Application Guide (PDF)
Reviews
Next flight after the new spark plugs were installed my 1982 Mooney 201 flew 5 to 10 knots faster true airspeed also climb better. Definitely a big improvement. Worth the money!
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Tempest Fine Wire Spark Plug URHM38S
It’s an inve$tment in spark plugs, but my Lycoming IO-540 seems to run smoother, ROP and LOP.
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Tempest Fine Wire Spark Plug URHM38S 12 Pack
I bought this one as a spare yet I’ve never had any fouling since I replaced all 12 plugs in my O-540 18 months ago.
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Tempest Fine Wire Spark Plug URHM38S
5 star all the way.
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Tempest Fine Wire Spark Plug URHM38S
Fast shipping, great product!
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Tempest Fine Wire Spark Plug URHM38S 12 Pack
Product arrived on time and as ordered!!
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Tempest Fine Wire Spark Plug URHM38S
Exactly as advertised. Adjusted the gap slightly and worked perfect. Broke the fine wire on an old plug and needed one replacement.
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Tempest Fine Wire Spark Plug URHM38S
Expensive for sure. Im getting faster starts on my Mooney. Think its running a little smoother lean of peak as well. Time will tell--those with Mooneys that have these installed with the Surefly ignition are having impressive results--I hope to go that route next.
I have been an A&P for 30 yrs. I have found Tempest spark plugs to be perfect every time. When I ask customers to replace their plugs they have all told me after their first flight with the new Tempst plugs that the engine runs so much more smooth.
First off, very quick shipment. The quality of the valves will be a test of the manufacturer and we will see what the service life is....but that has nothing to do with spruce
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.
The Tempest Fine Wire URHM38S XL spark plug uses an 18mm gasket.
There is no difference. They are one and the same.
The correct fine wire model to replace the REM38E plugs is the UREM38S.
URHM38S would be the replacement fine wires for the URHM38E massive plugs.
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.
7/8" socket, like our part number 12-01693.
Yes, massive plugs are gapped .016.
According to the manufacturer application chart, Cessna 150 aircraft with a Continental O-200A engine typically use REM40E plugs. We always recommend verifying in your specific aircraft parts manual as well as verifying current installed plugs to be sure you reorder correctly.
