Bilge pump short
Bilge pump on my 2005 SR1800 shorts out. After checking wiring connections from the pump and float, pump will initially work for a few seconds, then the 5amp fuse blows. I had an extra 20amp fuse, which I used, and the pump works. I only run pump for about 30 seconds, as I know I shouldn't be using this 20amp fuse.
Any suggestions as to why pump seems to work ok with 20 amp fuse but shorts out with the 5 amp fuse?