The choice of the correct plug and the compatibility between plug and fuel can greatly influence engine performance, so you must choose the best type of plug only after a brief test. In the list of spare parts, you will find the types of plugs available for this specific engine, while the table below will help you making your choice:
Air temperature | Plug for 3.5 cc and bigger engines | Plug for 2.5 cc and smaller engines |
0° - 15° | C6 | C5 |
15° - 35° | C7 | C6 |
Install carefully the plug using the appropriate wrench; the plug must turn easily until completely inserted. Then, tighten closely so the plug is secure.
The engine starts when the internal filament of the plug is incandescent thanks to the connection with a 1.5-volt battery.
When the battery is disconnected, the heat retained in the engine combustion chamber is sufficient to keep the plug filament alight, thus keeping the engine running.
In case of these high-performance model-racing engines, plugs have to be considered as consumable components.
The high technology used in production, and the top quality of the products used, ensure that our plugs have a longer life than others on the market.
However, the life of a plug can be lengthened and maximum engine performance guaranteed by a careful use, for example by:
Naturally, apart from when the plug is burnt out, it may be necessary to replace it because it is not giving maximum performance, such as when:
N.B.: when a plug burns out, part of the filament could fall into the engine and cause breakage the next time it is started. To prevent this risk, we recommend always checking the engine and cleaning all parts such as piston and head after a plug burns out.
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