The SE3130 with the Artouste engine has no rotor engagement procedure as far as I recall. The version with the Astazou engine (SA318?) has the ability to engage/disengage rotors with the engine running at idle like the Gazelle. The 3130 doesn't have this feature.
With the Artouste you just switch to 'marche', and it should all happen for you. I have a list of things to hit, tweak, dis-connect..... if it doesn't.