O.S. No.8 Short Body Standard Glow Plug "Medium"

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The O.S. #8 glow plug is the most widely used O.S. glow plug for O.S. engines. Recommended for most current O.S. (and other brands of) 2-stroke R/C engines. Note that O.S. engine plugs are SHORT body plugs and should only be used in engines that require a short body plug. O.S. plugs should not be used in Novarossi, RB Concept and most other motors manufactured in Europe.

  • Medium heat range plug for most model engine applications.
  • Plug is medium length, without idle bar.
  • For all 2 stroke engines.
See the O.S. glow plug chart below to compare the different short body standard glow plugs available for O.S. engines:

Model Heat Range Description
No.6 Hot Formerly known as the OS A3 plug. This hot plug will provide a more stable idle and crisp acceleration when compared to a cold plug. This plug is recommended for low nitro content fuels and .12 class engines.
No.7 Medium Hot Slightly "hotter" than the #8 and ideal for the constant "on/off" throttle action in 1/10 and 1/8 scale racing.
No.8 Medium A medium heat range plug for 1/8 scale racing and most .12-21 car, boat and truck engines.
No.10 Cold Formerly known as the OS A5 plug. This is now rated as a cold plug and is recommended for high nitro content fuel. This cold plug will produce the most power, but will provide a less stable idle and a narrow tuning window

This product was added to our catalog on April 13, 2006

Verified Owner
Thursday, Apr 22 2021 (about a year ago)
O.S. No.8 Short Body Standard Glow Plug "Medium"
These are the best plugs I use in my nitro engines (short plug). I have tuned hundreds of cars, helis, and planes, and this by far is the longest lasting, best performing plug I have ever come across. At the moment all the cars in my collection with short plug engines run the OS 8. The ones with a standard plug engines run OS LC3s. Buy with confidence.
Verified Owner
Wednesday, Jan 25 2023 (2 weeks ago)
O.S. No.8 Short Body Standard Glow Plug "Medium"
Exactly as described and fast shipping as always!Great product!O.S is where it's at!
Verified Owner
Tuesday, Jul 26 2022 (6 months ago)
O.S. No.8 Short Body Standard Glow Plug "Medium"
perfect fit for my kyosho fw06 long run times and long lasting
Verified Owner
Friday, May 8 2020 (about 2 years ago)
O.S. No.8 Short Body Standard Glow Plug "Medium"
have not tried these in my ys96sr yet but heard they work well
Verified Owner
Friday, Jul 5 2019 (about 3 years ago)
O.S. No.8 Short Body Standard Glow Plug "Medium"
I've never met an engine that wouldn't run with one of these. Cox 0.049? Throw an adapter on it, screw in an OS 8, and ittl run. Car engines? If they accept standard plugs, the OS 8 will work well. Plane engines? My 46AX runs an OS 8, OS 8s have run engines up to 30CC. They'd probably work in a four stroke but I don't have one to test!

If you still run glow and are pondering glow plugs, get an OS 8. Your engine WILL run on this plug. If it doesn't, the problem isn't with the glow plug.
Monday, Jan 24 2011 (about 12 years ago)
O.S. No.8 Short Body Standard Glow Plug "Medium"
When I got back into flying, this was the plug recommended for most of my OS aircraft engines. S I M P L Y A W E S O M E ! ! ! ! ! ! !
Sunday, May 11 2008 (about 14 years ago)
O.S. No.8 Short Body Standard Glow Plug "Medium"
Use this plug for two years and I don't have any problems.
Friday, May 2 2008 (about 14 years ago)
O.S. No.8 Short Body Standard Glow Plug "Medium"
if you want to spend your money buy this glow plug , DON'T BUY.