BD300 won’t start or make any noise to try to start

[Recon Marine]

Ran fine parked it in garage and 5 days later would not start or make any noise trying to start. Bought new battery, installed it and still nothing, no noise or anything. 
Any idea? I can’t figure it out since when I parked it, it was running great. 
Thanks

[Jaygyver]

Did you figure it out yet? You didn't say what you tried before buying the battery.

 You might try the easy things first, check the battery cables connections going to the relay and going to the starter from the relay, clean and tight? Check the cable to frame or ground areas  Make sure they are clean where they are bolted on and tight.

 Do the head lights come on but nothing from the starter? Then you are getting voltage for the lights but not enough amperage to the starter. Bad connections or could be a bad relay, blown fuse, bad starter or the key switch is bad or wires loose.

 If no lights and nothing from starter, then you will have to check every connection from the key to the starter. All you need to do is just make sure you have power going to the each component. Power to the key, power form the key to the relay, etc,.