I have a 175, 2000 vintage, 90 HP Johnson.
Nice boat, big motor, not worth the chance to do it myself. I pay $200 every year to have it professionally done. Safe and sound. And they check for anything I may miss. this year, water pump and new tires... then... take the drains off, tilt it back so any water drains, and it makes it through a New England winter. I may not, but the boat will be OK.... Ken