Hi Dave
I've owned a 1997 Coast Runner for about 6 years. Love this boat! Well made, high gunwales and good in rough seas. Evinrudes were labeled Ocean Pros and Johnsons were labeled Ocean Runner, no idea of the difference between these and a traditional OB. I think the Ocean label adds a little more stainless in the engine. I have the same oil reservoir and shared your concern. I researched and discovered there was an optional sender unit for the dash to monitor the oil, but I ddint see spending $150 bucks on it. If you research you can find them. Instead I went old school and got an old dip stick from an engine. i trimmed it to size and use that to show how much oil is left. As a standard practice I keep a gallon of 2 cycle in the boat at all times. My recollection is a tank of oil equals about a tank of gas.
Here is a picture of the original gauges that have a high failure rate. If you search the forum you'll find companies that offer plug in replacements if original wiring is still there.
I don't have any live wells cant help you there.
https://photos.app.goo.gl/PfzWNKSVnez7FSJj2
_________________
Mannix2
Hyde Park, NY

1997 Four Winns 203 Coast Runner-150hp Ocean Pro Evinrude
"BONA 4 TUNA"
1986 19' Bayliner Capri 125 Force