MultiHub Forum

I bought a used boat last season with a five-year-old four-stroke outboard, and I want to do the winterization and spring commissioning myself this year to save money and learn the engine. I have the owner's manual, but it's pretty vague on some specifics like fuel system treatment and lower unit lubrication. For seasoned boat owners who handle their own maintenance, what are the critical steps you never skip during winter storage, and are there any particular tools or products you consider essential for keeping an outboard running reliably season after season?