Water damage, air filter, carburateur, magneto and pont.
Energic motoculteurs when left outside for extreme lengths of time water will enter various parts of the motoculteur. This causes damage to different degrees depending upon the penetration of water.
Initially water enters through the air filter, causing the surrounding metal element to initially corrode and then disintegrate. The water pools in the filter. See below a extreme example:

Air filter water damage on the motoculteur

Air filter water damage dismantled showing ruined air filter

Air filter water damage dismantled showing ruined base attached to the carburetor
This outer element can be replaced, and the inner metal filter possibly saved – No I do not think so!
Very difficult to undo the carburetor from the air filter as it is normally a tight fit but with rust virtually impossible.

Air filter water damage dismantled showing ruined base attached to the carburetor

Air filter water damage dismantled showing ruined base attached to the carburetor very difficult to dismantle in one piece!
The water damage can extend into the carburetor air inlet and cause the following corrosive problems:

Water damage extended to the carburetor air inlet

Water damage extended to the carburetor air inlet seen dismantled and the amount of corrosion
This rust can be clean up and out, But it will leave corrosive pitting on the effected surface!

Water damage extended to the carburetor now ready to clean

There you go!
Yes it can get worse, if water/moisture transfers to the inlet valve/air intake this causes another set of problems.

moteur fuel/air mixture inlet form carburetor water damage
In fact if the inlet valve is fully open then you will get moisture into the combustion chamber which will intern transfer to the valve stems and springs and so on.
Look inside the pont/transfer box. Invariably there will be a mixture of oil and water resulting in a sludge. And in extreme cases just water, with no visible sign of oil. You must evacuate the water/sludge and clean. Then dry outside on a suitable hot day before replacing with oil in this gear box.

Pont inspection hole water damage

Wheel gear water damage, not severe protected by the inspection hatch

Oil from the pont water damage
Here is some sludge I had the misfortune in discovering in a Energic motoculteur C7 B4L, stood for 36 years in the same place – outside.
Another weak spot is the magneto inspection front cup. As you can see from the rust tide mark water got into that level!

Magneto outer lid water damage

Magneto water damage
Here it is better to dismantle the magneto, clean and replace the contacts. Re-assemble to be sure of effective long term results.the
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Read more about Energic Wheel clutch pins here.
Read more about Energic Fan assembly and grease cups here.
Read more about Energic Motobécane engines and history here.
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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