Im not entirely sure what you mean by launching it, you mean from a trailer? if so then no, a boat should never be started when it is out of water unless you really know what you are doing, 85% of boats need the lake/river/sea water for cooling the engine. there are some boats that have a closed cooling system that can handle the cooling for a small amount of time but it will eventually need lakewater.
before you get it wet so if there is a problem you can remedy before you have to pull the vessell back out
Before launching your boat at a boat ramp, you should park your vehicle in the standby area to load your equipment and supplies. You should not enter the ramp area until your items are loaded.
One place to avoid anchoring a boat would be to not anchor it near a launching ramp.
Launching from shore.
flounder fish
i would look out or rosie odonald , chasing you wanting her panties back that you are using for a sail
shut off the engine
Ventilate the engine compartment, if enclosed.
You should let the ventilation system run about four minutes before starting the engine on a boat.
Insert the drain plug.
Insert the drain plug.
Aquia Boat Storage and Launching is one of the many trailer storage facilities that are located in Stafford, VA. It has many launching and amenities available to their customers as well.