Today I removed the ''trial fitted'' speakers and made some gaskets from doubled over Rescue Tape before refitting.
Here is a trick to get the speaker polarity spot on, I know a lot of you pimp my ride guys know this already;)
Sometimes a speaker is not marked + or - on the terminal or both terminals are the same size (the wider one is usually +). A quick and dirty way to check polarity is to use a 1.5 or 9 volt battery. The polarity will be correct if the speaker cone moves forward when connected briefly to posts. If the cone travels inward the wires are reversed.
Cut off the old ratty ignition switch and shortened the harness by 5 feet,( not into having zip tied coils of ''extra'' wire inside the console).Ive seen some real short cuts on a few boats over the years.:(
Because this is a ''wet'' boat I use high quality marine grade wire and terminals tinted and soldered, later to be coated with silicon core heat shrink and coated with liquid tape over the switch post screws.
As the sun set I fired up the Mercury from the console for the first time with the tunes in the background. Still lots to do... radar, GPS, sonar, bilge pump and lighting. I know I'm missing some epic diving off shore and should just pay someone to take me out before the water turns cold.
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