Yesterday we went over the first few steps in winterizing an Evinrude 9.9 outboard motor. We left off with flushing out the motor with cool water. After the motor has been flushed, allow the water to drain from the cooling system as the outboard sits upright.
Next, drain the lower unit and refill the unit with gear lubricant. Also use this time to inspect the propeller shaft for any cracks in the seal. Change the motor oil; Evinrude outboard oil is preferred, especially for four-stroke engines. Finally, disconnect the spark plugs, spray fogging oil into the ports, and bump the starter to evenly distribute the spray. Finally, disconnect the portable fuel tanks, the battery, and remove the propeller. Store everything neatly in a dry, secure location and your 9.9 Evinrude outboard motor should weather the winter perfectly.