What kind of boat? Are they impeller driven or aerator pumps? I’d feel each pump to make sure they’re running. If not, I’d get a multimeter on each pump and make sure you’re getting voltage. If you’re not getting voltage, I’d check fuses and then the wiring. If they’re impeller-driven there’s nothing to prime but the impellers may be worn out. I’d still confirm you’re getting power to the pumps first. If they’re aerator pumps the above post’s recommendations should work.
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