That is a sportjet. Technically an inboard in a sense. It is a force/chrysler 2 stroke vertical outboard engine mated to a jet drive, either 90/95, or 120 hp. The 120's 4 cylinder ones weren't bad. The 90/95's were prime examples of force engines.
Be very, very careful running the smaller sportjets dry, even with the flushing hose adapter attached. If the exhaust outlet isn't underwater (which is part of the ride plate), they can build up raw exhaust gases when you crank it, and when it starts it can ignite that and blow the seal off the ride plate. Fairly common problem caused by running on dry land.
If it isn't starting easily, stop! Let any fumes in the exhaust dissipate before cranking some more.