Notes
1) ISO: International Organization for Standardization
2) 2) JIS: Japanese Industrial Standard
There is a British Standard laid down for the control of synthetic rubbers. BS 3574 (1989) helps to determine shelf life – for instance, Nitrile (NBR) and Polyacrylic (ACM) are Group ‘B’ rubbers and have a 7-year life, whilst Silicone (VMQ) and Fluoroelastomers (Viton®) are Group ‘C’ rubbers and have a 10-year shelf life. PTFE and Leather do not come into this category but like the others should be kept in the original packing for as long as possible away from direct light, dust, and humidity. Ozone, which can also be produced by battery-driven forklift trucks has a very bad effect on synthetic rubbers. Finally, protect the sealing lip – DO NOT hang the seals on nails, wire etc.


See here for more information and useful fitting tips.
In conclusion, the spark plug ignition coil is a critical component in the operation of an internal combustion engine. It is responsible for generating the high voltage needed to create a spark for ignition, and a properly functioning ignition coil is essential for engine performance. Regular maintenance and timely replacement of the ignition coil are necessary to keep the engine running smoothly and efficiently.