In addition to Mike's comments and question, I'd add recommendation to do a complete tune up: distributor cap, rotor, coil, wires, and plugs. This will eliminate the most likely causes of your no-start.
There will be an ignition trouble shooting tree in your service manual. Let us know if you need assist with this.
To your question about the kill switch; what you are seeing is normal. The kill switch grounds the spark at your shift interrupt, but starter can still turn.
2006 Bayliner BR205
A1 Gen 2 1.47
5.0 carb engine