what is propper procedure for cranking two merc outboards 72-400?

i have two mercury outboard engines. a 72 and a 79 BOTH R VINTAGE 4O HP. the 72 sank was drained and a new carb along with ignition and starter have been replaced, once mounted and wired linking and syncing. just and fuel and baterry and go from there or are ther a step by step procedures. got to handle the fishing expo in july so i got to get bushy once there running i got a lott of rigging to do.THERE GOOD SOLID BOATS CAN BE RIGGED TO SPECS