Congrats on the Puma. Fine rig.The tanks should be the same.Are you talking about while fishing or for storage/traveling purposes on the auto bilge? While fishing, your main power will be on and yes you have to have the “auto” light on for it to kick on once enough water is in the bilge to trigger the auto float. Ill put mine on auto while fishing if it is raining or if the wind is really bad and Im taking some waves over the bow. If for storage/traveling purposes and you dont want to pull the plug, then yes the main power has to be turned on and then the pump put on auto, but you can then turn off the main power and it will remain armed in auto mode. This will, however, put a small drain on your batteries so be sure to charge your batteries before your next use so you are not surprised with a low battery at the ramp. There are a few with Evinrudes, so maybe one of them will come along and talk more about props and lower units.Last edited by toledobasser on August 19th, 2014, 10:05 pm, edited 1 time in total.Jim EbarbMany, LA (Toledo Bend Lake)2004 Cougar/ 225 OptimaxHumminbird Helix 12 Chirp SI on BalzOut Mount at bowLowrance HDS 7 at bowHumminbird Helix 12 Mega SI on Ram Mount at ConsoleLowrance HDS 8 in dash at console