Put the bilge pump on in the boat, it made a quick noise and then shut off. I checked the fuse in the dashboard and it had blown. Swapped it with another in the panel, still not working (although the little green light on the dash did come on, the pump did nothing). Checked down by the battery, one of the red lines has what appears to be an inline fuse (plastic yellow capsule). I tried the old push, twist, then open for about 5 minutes in the sweltering heat...then was too sweaty to get a grip on it. Funny thing is, it would push, and twist, but wouldn't open. Any thoughts? Could this fuse even be the problem (ie why would there be 2 fuses for the same thing?).