Hello,<br />I have been wanting to winterize my engines for several years, but have a couple of concerns which I will list after the procedure I observed from yard mechanics at my marina. It appears to be very easy and I think I'm up to the challenge. I would appreciate any advice.<br /><br />1. Open engine strainer and run water from hose, start engine and run until operating temperature is obtained.<br /><br />2. Drain manifold and block on each side of engine (1 per side), use a solid core wire to probe openings for blockage, replace manifold petcock and block plug.<br /><br />3. Remove fuel filter and remove approx. 1/2 inch of fuel and replace with 2 cycle engine oil (engine is fuel injected, I observed yard mechanics doing this to fog).<br /><br />4. Replace garden hose with a hose connected to a 5 gallon bucket of -100 degree marine engine anti-freeze. Start engine and run until anti-freeze is gone.<br /><br />That's what I observed. My concerns are as follows:<br /><br />1. When the boat is in the water. Water is discharged from the sides of the boat. I have not been able to get the boat to do this out of the water from the strainer (with hose)or with a "fake a lake" device from the underwater intakes. I believe water is discharged from the exhaust manifolds and I cannot develop enough pressure to do this out of the water. By draining the manifolds and block do I have to worry about anything in this area?<br /><br />2. After replacing the manifold petcock and block plugs then running anti-freeze through the engine. Should I drain them again?<br /><br />3. Is there any advantage by just draining the block and manifold and filling the block with anti-freeze through the thermostat fitting? If I use this procedure, do I have to remove hoses from the bottom of the engine to drain? Do I just fill the block until anti-freeze comes out the thermostat fitting?<br /><br />Sorry for the long post, but I want to be sure.<br /><br />Thank You.