On Wed, 16 Dec 2015 10:23:26 -0500, wrote:

If you burn a whole tank every time you go out, never mind but we
usually get 2 or 3 trips on a fillup.
I came up with this to remind me to put some gas in before I get ready
to go. It is better than figuring out I am low after we are all on
board and I start the motor.
I hang this on the lift switch when I am putting the boat away if I
know I am low coming in.
I will see this before I get on the dock. Then I can get a can of gas
and put it in while the lift is going down.

http://gfretwell.com/ftp/gas%20reminder.jpg

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That's some heavy duty switch. Did you re-purpose it from something
else?