Before my fuel system issues (see separate thread) when I headed to the boat this week there was water in the bilge and the pump was not working.
I used a manual pump to pump it down, and discovered my bilge pump was a total meltdown. The top motor housing was melted to a blob, with a hole blown in the side like it had exploded. Fortunately the fuse had blown before anything caught on fire.
Any idea of the cause? I presume either the float stuck and it ran so long it overheated, or possibly the motor locked up somehow which caused the meltdown.
I replaced the pump, and everything else seemed fine including the switch.
I've replaced a lot of bilge pumps, but never seen anything like this. It didn't ice up and lock up, the boat's in FL. Maybe there was just a short inside the motor windings.
One note, there was a blown 15amp glass fuse in the fuse holder. The pump had stamped on the housing "use 8 amp fuse". I would have thought a 15 amp fuse would blow before it could melt the whole motor housing. Guess not.