how to eliminate keyless start ? and 2nd power

Just wonder any one can know how by pass the keyless key pad to start the engine? as an emergency way when the key pad fail and we don't wast a holiday,
also ,want to hear some idea to set up a 2nd spare power for go back marina when engine die on the sea or hit stone , for example, A 10HP small outboard engine in cabin, can set up fast,so we can go far activity some times without worry single old GT-40. I'm using 2001 SUPER AIR NAUTIQUE.