Small planing boat

A small planing boat comprising a hull, an engine supported by the hull and connected to an intake passage configured to introduce air into the engine, an exhaust passage configured to guide exhaust gas away from the engine, a crankshaft disposed so as to extend generally in a longitudinal direction of the hull, and an intercooler configured to cool air to be supplied to the engine with cooling water, the intercooler including an upper end, a lower end, an internal air passage, a cooling water passage configured to guide cooling water into thermal communication with the air passage, at least one cooling water inlet, and at least one cooling water outlet, wherein either the at least one cooling water inlet is disposed at the upper end and the cooling water outlet is disposed at the lower end or the cooling water inlet is disposed at the lower end and the cooling water outlet is disposed at the upper end, a compressor configured to compress air and to supply the compressed air to the intercooler, the compressor having a compressed air discharge port directed approximately parallel to a center axis of a cylinder provided in the engine, either one of the air inlet and the air outlet of the air passage is disposed at the upper part of the intercooler and the other at the lower part of the intercooler, and if the discharge port of the compressor is directed upwardly, the air inlet of the intercooler is disposed at the upper part of the intercooler and if the discharge port of the compressor is directed downwardly, the air inlet of the intercooler is disposed at the lower part of the intercooler.