Regal 3300 Owner's Manual page 114

CHAPTER 4
quick disconnect clip. If the breaker for your bilge pump "trips", be
sure to investigate why the bilge pump was drawing too much power.
Likely causes of bilge pump malfunction are debris in the impeller, bad
impeller, debris in the float switch, bad motor, or short circuit.
Typical Bilge Pump And Automatic Float Switch
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4-2