Ducellier distributor new vacuum unit for Renault R4 4L sedan or F4 or F6 van.
This part reacts according to a depression created by the operation of the engine. This depression, variable according to the speed, acts on an internal membrane which can modify in real time the contacts adjustment.
To find out if your capsule is defective, you can reproduce this depression by stepping strongly through the exit of it. If you do the test with your mouth, go ahead, at the risk of not detecting anything. You will then see the set inside the igniter move a little.
New vacuum unit for Ducellier distributor.
Mounts in place,
For any Renault R4 4L sedan or F4 or F6 van with Ducellier igniter with vacuum capsule,
Ref. Renault Equivalent (s):