The utility model relates to an outboard
engine testing device which comprises a frame body, the top of the frame body is provided with an installation bracket, the top of the installation bracket is connected with a
lap joint handle in an inserted mode, the outer wall of the
lap joint handle is fixedly connected to an outboard engine, the top of the frame body is fixedly provided with a bracket, and the top of the bracket is connected with a circulating water tank in an inserted mode. The outboard
engine testing device comprises a circulating water tank, a circulating water pump is arranged in the circulating water tank, a
water stop plate is arranged in the circulating water tank, a water overflow hole is formed in the center of the
water stop plate, and a water outlet hole and a water inlet hole are formed in the inner wall of the circulating water tank, according to the outboard
engine testing device, a water inlet and a water outlet of an outboard engine are connected with the water outlet hole and the water inlet hole of the circulating water tank through the circulating water pump and a first connecting hose; when testing is carried out, condensate water in the circulating water tank is pumped out through the pump body and conveyed to the outboard engine through the second connecting hose, the condensate water is circulated through the outboard engine and then is discharged into the circulating water tank again through the first connecting hose, and a
water stop plate is arranged in the circulating water tank.