Water in motor
pull all the plugs and *slowly* turn it over by hand and see if any water comes out.
then i'd drain the oil and see how much water comes out.
if it's minimal on coming out of the plug holes, i'd spray a metric *** ton of lube down there (and pull the carb and spray down the runners) and slowly turn it over by hand a whole bunch.
if it's minimal intrusion on the sump, i'd refresh the oil and run it and plan on changing it and the filter fairly quickly.
i can't stress this enough: turn the motor over by hand, do not just lean on the starter and try and clear it.