Spark Plugs/Bougie d’allumage.
Early Energic motoculteur models B5, C7 4BL and some D9 5BL models used a smaller diameter (14mm – width) spark plug with a 1.25 pitch. Such as the new replacement Bosch RO 10 542, UK 10 Champion L87YC or the NGK 3993 BR10EG. the aperture change with the 408 models.

Early example single electrode KLG FF 50B narrow early type

New Single Champion OE007 L87YC narrow
Or triple;

New type triple electrode narrow
The new S Bloc engine, late 1934, used a larger diameter (18mm) spark plug with a 1.5 pitch. Such as the new replacement parts of a D16 Champion or an NGK AB6.

Early example single point AC C86H.

Early example triple point KLG.

Early example triple point KLG.

New type single point D16 Champion (18mm).
For Energic C7 and D9 S Bloc onwards.
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Read more about Energic motoculteur C7 B4L here.
Read more about Energic motoculteur D9 B5L here.
Read more about Energic motoculteur D9 S Bloc here.
Read more about Energic motoculteur C7 S Bloc here.
Read more about Energic History here.
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