Since you have no idea how to tell whether an engine two or four stroke, here goes: Look at the engine cover. If it is a four stroke (especially older ones) it will say so on the cover. If that doesn't work remove the engine cover. Most small to midrange HP two strokes will have a plastic oil container on the side of the engine. TWO-STROKE oil is put in this reservoir and it is mixed automatically with the fuel. Some two strokes have a separate oil container mounted at the stern of the boat near the engine. If the engine is a four stroke, you will find a dip stick like the one on your car (you do check that once in awhile -- not????). On a four stroke, engine oil goes into the crankcase. A four stroke engine will also have a valve/cam cover just like your car. Two strokes have a very flat cylinder head where the spark plugs screw into. Four stroke engines have spark plugs that are generally screwed in at an angle. If you still can't tell -- then before you even attempt to operate this boat, have someone who does know the difference show you how to check and operate it.
