i reccomend inspecting the bearings, clean and repack with fresh grease before your first time on the road.. who wants to be on the side of I-94 with a seized bearing... easy to avoid... also when you get to the ramp let the axles cool down before launching... the warm bearings entering the cooler water will draw moisture in immediatly which will lead to early bearing failure
water pump impellor? do you like your motor? i reccomend every third year, unless you have damage to your skeg and prop.. the impellor does not like sand... or if the boat has been out of service a few years start off with a new impellor...yes your motor with a wore out or broken impellor will cook like a xmas goose!
change the fuel filter after starting and running the motor as sometimes they lose their prime, good idea to clean the fuel bowls out also, even with the best fuel stabilizers, i have seen them gumm up..
same goes for the spark plugs new ones in the spring, you don't want to be stranded out in the lake because of a fouled spark plug!
lower unit drive lube, check in the fall if dirty, drain and refill, if milky , drain it then have it resealed
make sure no zebra mussels are plugging up any water intakes or passages also...