I have a red buzzer sounding on dash and someone said to change thermostat. How can i find procedures to do this? I have manual but has no info!! Plus my selector switch is broken and iam wiring a 3way toggle switch it has a blue,red,green wire any help would be great!!! I just bought the boat and had $300 of work done to fix prop seals dont want to spend anymore and want to do it myself! Thank you!!!