it came with two blue hoses for draining block and manifold but would like to add antifreeze or something to water system to keep it from rusting out over winter, yes i live in texas and don't see to many day of freezeing weather but can i rehook hoses and added antifreeze and will it laek out the lower unit when i store with lower unit down and should i leave prop off also is it best to put a trickle charger on battery or bring it in the house and charge it monthly also do i have to fill the fuel tank all the way or is half a tank ok