Hi Brian, You are likely to run into problems with a bitza AMAC because the correct one was made specially for Scotts, with a different primary airway system to suit the relatively poor low-speed induction suck of the Scott engine at kickstart speed. For the same reason most Scotts need a lot of flooding and carb tickling to start from cold. I have a leaflet on the subject somewhere, and when/if I find it I will send you a copy. Regards, Brian.