Its easy to winterize your Marlin. I have been winterizing my boats for years. I had a 1996 272 and now a 1997 Marlin since 2002 with the F225's. West Marine will have everything you need. Pick up 4 gallons of antifreeze for the water, can of fogging oil, quart of lower unit oil for each motor( I use the synthetic), stablizer for the fuel. Run the fresh water tank until its empty. I bypass the hot water heater, some guys dont. Not sure where yours is located but mine is in the aft cabin port side behind the wall. Just take the hot water hose and cold off and connect together so no water runs into the heater, drain the heater with the fitting thats attached to the side of the heater, it will drain into the bilge, the heater is done. Add 3 gallons of antifreeze to the water tank, prime the system and turn on all drains one at a time until it runs pink, cold and hot run them seperately, dont forget the windshield washer, your done. Pump the head dry and add 1 gallon of antifreeze to the bowl and hit the macerator for a few seconds, heads done. Follow the directions on the fogging oil can, pretty simple to fog the engines, dont forget to buy a pair of rabbit ears for the fresh water. Dont run the engines too long on the hose with the ears, only long enough to warm the engines and fog them. Add stabilzer in the fuel tank before winterizing so you get the stablizer through all the fuel lines. Change the lower unit oil, buy the pump West Marine sells, its cheap, make sure it comes with the correct fitting for your lower unit, normally does though. Run all your pumps until dry, livewell, bilge, etc. I also change the water seperators at this time, some guys wait until the spring. I store the boat empty of fuel, always have and never had a fuel problem! I also have a Yamaha 2 stroke on my little boat and do the exact same thing with that engine. Spray down the engine with a good quality CRC or something similar, grease all fittings. Thats it your done. I live in NY and have been doing this for over 12 years now and never had an issue. Spring time fire them up and change or clean the plugs and add some fuel. By the way I am not that handy or mechanical.