Question

all electrical systems should be shut off when filling inboard tanks, and before starting the engine, the blower should be run for at least how many minutes

Answer 1

All electrical systems should be shut off when filling inboard tanks and a blower should be run for a few minutes before starting the engine to remove any potentially flammable vapors.

Step-by-step explanation:

Inboard tanks in a boat may contain fuel or other flammable substances. In order to prevent any risk of fire or explosion, it is important to shut off all electrical systems before filling the tanks. Additionally, before starting the engine, a blower should be run for at least a few minutes.

This is because the blower helps to remove any potentially flammable vapors that may have accumulated in the engine compartment, preventing them from igniting when the engine is started.