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  • O.S. No.8 Short Body Standard Glow Plug “Medium”
  • O.S. No.8 Short Body Standard Glow Plug “Medium”


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    O.S. No.8 Short Body Standard Glow Plug “Medium”

    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:

    ModelHeat RangeDescription
    No.6HotFormerly 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.7Medium HotSlightly “hotter” than the #8 and ideal for the constant “on/off” throttle action in 1/10 and 1/8 scale racing.
    No.8MediumA medium heat range plug for 1/8 scale racing and most .12-21 car, boat and truck engines.
    No.10ColdFormerly 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
    Weight.5 lbs