compartment independent of the water a floor of the engine compartment may be adapted to contain water splashing and direct water to a water collecting part application_number US 31492405 A description embodiments of outboard motors showing aspects of the present invention are now described of course the present invention is not limited to the disclosed embodiments fig1 is a side view of an outboard motor mounted on a hull an outboard motor 1 according to this embodiment is attached to a transom board 100 a of the hull 100 by means of a clamp bracket 2 a swivel bracket 5 elastically supporting a propulsion unit 4 by means of upper and lower damper members 3 is attached to the clamp bracket 2 by a tilt shaft 6 in the manner that the swivel bracket 5 can pivot about the tilt shaft 6 in the up and down direction the propulsion unit 4 has a housing composed of a cowling 7 an upper case 8 and a lower case 9 the cowling 7 has a top cowling 700 and a bottom cowling 701 the top cowling 700 is detachably mounted on the bottom cowling 701 the cowling 7 preferably contains a four cycle engine 10 the upper case 8 is attached to the bottom of an exhaust guide 11 the engine 10 is supported by the exhaust guide 11 a crankshaft 12 disposed vertically in the engine 10 is connected to the.