My father-in-law's runabout had a bilge pump directly wired to the battery .... installed right next to the gas can! Well, there is ventilation in the compartment, but it's pretty inconvenient when the only way to turn the bilge pump on is to make contact with the battery terminal directly with alligator clips!
So, I installed a very simple on off switch and fuse. It may not be perfect but it's safer than it was.
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