Honda BF9.9A Owner's Manual page 49

5.Tilt the outboard motor and remove the plug caps and disengage
the emergency stop switch clip from the engine stop switch. Pull the
recoil starter several times and completely drain off the cooling
water.
piEq
tf the outboard motor is put on its side immediately after stopping it
without completely draining the cooling water, water may enter the
engine from the exhaust port. Be sure to drain the cooling water
before putting the outboard motor on its side.
6. Change the engine oil.
7.Remove the spark plugs and pour about a tablespoon of clean
engine oil into the cylinders. Crank the engine several revolutions to
distribute the oil, then install the spark plugs.
8. Pull the starting grip until resistance is felt (i.e. until the engine valve
closes, preventing dust from entering the combustion chamber).
9. Store the outboard motor in a clean, dry area.
NOTE:
Before storing,. clean, flush, and lubricate the outboard motor as
described on pages 37 and 38 .
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