vinnyf

i have a 2001 250 hp ox,what should i make sure that my marina did for me over the winter,i had my water pump and impeller changed,my o2 sensor is being cleaned.my motor has less than 190 hrs on it.is it time to change my plugs or just take them out clean and regap them.2 yrs ago the thermostats were changed,am i missing anything ? do the wires need to be changed ? what other maintenance needs to be done on a regular basis.the motor has treated me very well never even a hiccup