On my Manta Mirage I have a carb 350 and I'm trying to understand the mechanics of the cooling system and work through a resolution. What I mean is that I always thought you could not have air in the system, but I have no coolant reservoir and there is no way for me to fill the system without air in it that I've found.

#1 - am I correct you should not have any air in the cooing system

#2 - does a coolant reservoir need to be at the highest point in the system

#3 - anyone have a possible resolution/suggestion