Steve,
If you don't already have a second battery I'd get one. Then get an "A -
off - B - Both" battery switch, which go for $35 to $100 so you have
choices.
Paul

"stevec" wrote in message
...
My new old boat has a 1997 quicksilver shifter. I pulled the key out ,
power still availabel for the controls. Is there a switch I can shut
off power to the tilt and trim and others ?