Coolant Alarm Sounding.
I've got a 2013 Mercury 175hp Pro XS Optimax Serial # 2B018990 model 175P73EY. Recently I was at the lake and had the alarm sound on my mercury. Switching the motor off I found I believed the cause to be the coolant system. I took the boat to the Mercury tech to have the motor diagnosed and fixed. I believe the cause for the alarm sounding is that the water pump and thermostat is due to be replaced. My question how involved is it to replace these two components? My mercury tech will be performing these task I was just interested so I would have an idea as to the cost of these repairs. All this said if the water pump and thermostat are the needed repairs.