daytrader

Help me please.
I have a 2000 speedster. My oil got low and started beeping. I came home took off the cap and filled the big oil tank with premium plus. Then I filled the small tank on top the engine till it overflowed. I then tryed to start the boat but it will not turnover.
What do I do?
Also there is a long hose going over the engine from one side to the other. It lays along the floor and it has a long thin filter on the end of it. Did it come loose from something or has it always been laying there and I never noticed it.
Thanks in advance. I'll hang up and listen to your answer.
Aaron