All the Alouettes have a centrefugal clutch that requires a procedure to ensure rotor engagement without burning out the clutch. I have been off them for many years but I seem to remember ground idle is about 1800 rpm and to engage advance fuel flow to 21000rpm then slowly advance as rotors start turning. I'm a bit wooly on it as Ive been off them since '75/76 but I do have 3130,3150,3160/316B,318C on my licence and Section L A,B and C on my CAA licence. Suggest you get the official procedure, getting a clutch repaired would be a pain in the ass these days.