what kind of radio/stereo? does it have an external antenna connection? usually two screws (300 ohm) or the coax cable (75 ohm)
my old shop radio was the boom box from when I was a teen. I wired a simple home made T-antenna (similar to the $5 FM antennas) and shoved it outside the window and...
A metal building is a faraday cage. Any antenna run outside the building will help. I usually stream a few stations because i have an office made of metal studs within a metal building. My cell doesnt even ring in the office
Your Mercruiser used their own standards back in 1985. However all wiring including the new harness you bought follow this wiring which is a derivation of various SAE and AS standards
that is run-on. and that little gasp at the end is the motor running backwards and sucking water from your exhaust. I bet you hydrolocked which is why it wouldnt start til morning, I bet you find water in your oil
