Have not run them yet, however have had good performance from Tempest in the past

Harold B Verified Purchase

Tempest Plug UREM40E 12 Pack

My champion plugs are fouling and their resistance is all over the place. Going to try Tempest. Better price and supposed better quality and consistency.

Theodore C Verified Purchase

Tempest Plug UREM40E 12 Pack

These seem to be good so far.

Jack H Verified Purchase

Tempest Plug UREM40E 12 Pack

Appear to be a quality product. Time will tell.

Robert B Verified Purchase

Tempest Plug UREM40E 12 Pack

Cheaper than other plugs however have had 2 failures in the last 3 years - one intermittent and one shorted.

Ed M Verified Purchase

Tempest Plug UREM40E 12 Pack

good price on plugs !

Souther F Verified Purchase

Tempest Plug UREM40E 12 Pack

Outstanding!

Morris W Verified Purchase

Tempest Plug UREM40E 12 Pack

Radio noise with EM41E plugs, these took care of that.

David S Verified Purchase

Tempest Plug UREM40E 12 Pack

Shipped quickly

Leroy W Verified Purchase

Tempest Plug UREM40E 12 Pack

My first experience with Tempest spark plugs. Upon receiving 12 urem40E spark plugs I checked resistance in each plug, they were all in specifications (500 ohms to 2,500 ohms for new plugs). The lowest reading was 745 ohms and the highest was 1445 ohms, most of the plugs were around 1,325 to 1,345 ohms. The plug gaps were all within specifications (.015 to.021). I regapped all plugs (.015 to .018) and installed them in my Cessna 172 with a Continental o300 engine and they are all working fine so far (2 hours). The Champions I took out had about 500 hours on them and all were within resistance specifications and all were within erosion tolerances and all were serviceable spark plugs. If the Tempest plugs match the Champions performance, I will probably stay with the Tempest plugs due to the $10 price difference per plug ($120 total savings).

Lloyd M Verified Purchase

Tempest Plug UREM40E 12 Pack

its a spark plug

Victor W Verified Purchase

Tempest Plug UREM40E 12 Pack

These Tempest plugs were ordered as replacements for my current plugs which are getting worn. The current batch has given me flawless service

Art H Verified Purchase

Tempest Plug UREM40E 12 Pack

So far, so good. Nicer finish than Champion.

William S Verified Purchase

Tempest Plug UREM40E 12 Pack

Great plugs

Miguel A Verified Purchase

Tempest Plug UREM40E 12 Pack

I would definitely use Tempest Aviation Spark Plugs. Performed a resistance ohms test (using a volt/ohm meter) and found all the plugs with the manufacturers limits. Checked a Champion plugs that were installed previously and found several with resistance over 5K ohms (over 5K ohms can damage magnetos and ignition wires) whereby the Tempest plugs averaged 1.2K ohms.

Quick delivery, good price.

The plugs showed up promptly. They replaced the worn-out Champion plugs in my A-65, and I’m pleased with the Tempest plugs’ performance to date.

Installed on Cessna 150 O-200

1

Items arrived promptly, well packed and exactly what I ordered.

Spark plugs were great

Never used Tempest plugs. Willing to give them a try based on their reputation.

Great plugs, no complaints. Only one tip, if you order these, make sure you have an extra deep well 7/8 socket. Not all deep wells are created equal. I had to go to three different hardware stores and try numerous brands before I found one that fit. If you want to be certain, a DeWalt brand deep well will work. This cost me some time on installation, so maybe Ill save you the trouble.

Great application, great price. Easy order process.

Great Product, Good Price, fast shipping !!

Excellent product

Changed out the old ones and these fired right up and the engine runs great

The staff was very courteous and knowledgeable about my needs to service my plane

Fast shipping

prefer these plugs to the champion plugs.

I am a aircraft mechanic/IA I bought these spark plugs to keep ad back up. For a dropped plug or bad plug found during inspection.

They sell my product at their stores, But being they do I should be loyal. But like old habits!! you have to shop!!!!! But doing so !!! I found out The Co. had the best price other than a E bay , very little even their. So I guess it is faster and simple just open the book and order.. SAVE TIME AND !!! MONEY. SOME VENDERS WERE $10.00 HIGHER PR PLUG. AIRCRAFT SPRUCE IS EASY AND FAST.

Good plugs. All checked at appx 1600 ohms and we’re ready to install. Running well on my engine.

Well. Theyre spark plugs. I dont understand why theyre so expensive, since they havent changed in over half a century, but it is what it is. ACS prices were at least as cheap as anyone elses, fast shipping, good service.

Great price, fast shipping!!

The Tempest plugs UREM40E are perfect for my Aeronca Champ O235 Lycoming.

Great pricing and quick delivery

Working great ,better starts and less mag drop

New Sparkers working perfectly. Eliminated some vibrations that the worn out plugs were introducing.

Good product

Arrived on time. Installed and work great. I would suggest that something be added to the description about the need for a specific socket. I regular socket does not fit

Great product

Excellent product. Comes with gap needing to be fine tuned.

Very fast delivery. Aircraft Spruce has always been excellent. Well packed spark plugs .. shipped quickly. Ive been an occasional customer for the last 30+ years and never had a problem.

I’ve always used Champion plugs, but A&P recommended I switch to Tempest. Appreciate they are more affordable and after 10 hours, they are working very well still. Hope they hold up!

Tempest are good quality plugs, better than Champion according to most everyone I ask.

Great so far. Replaced all the top plugs in a o300 with massive and went with the fine wire on the bottom. Woke the old 172 up a little. Got rid of some stumbling.

I like champions, however for practical rea$ons I buy Tempest,, why? They are 5 bucks cheaper. As far as I can tell there are no practical discernible differences between the two makes. I have had champs on one magneto and Tempests on another and it made no performance difference. It be good when we can buy straight automotive plugs, those are the be$t.

Recommended. They work like theyre supposed too. Air tight packages also.

They have been lasting well over 600 hours in our club with no issues.

Seems like a more substantial, better plug than the Champions they replaced. Had 12 Champions in my O300. At annual, found seven that failed a resistance check after only 200 hours in the engine. A&P was not surprised and recommend I buy the Tempest. Purchased these, they all passed the check (as they should being brand new). Installed easily and engine is running great.

One of the 8 plugs that I purchased was would not function on the aircraft and failed a function test. It was returned to Aircraft Spruce and it took 3 months to receive a replacement. This is the VERY FIRST time that I have ever had a problem with Tempest Aviation Spark Plugs. I certainly will continue to used Tempest plugs exclusively. I just wish that the replacement was more timely.

Just went up about 2 bucks again quietly :/, went to auto zone for socket to fit these, found a deep 7/8 socket for oxygen fitting with split down the middle for about $13.00 that fits perfect.

Nice product, better than champions, but. Flats on the plug body are lower than the champions profile and it took me to three different sources before I found a 7/8 inch socket that would fit the plugs . Hint:: Stick with the standard plug profile.