Kawasaki, I think the first jet ski was made in 1974 I believe it was a 440cc stand up. You can find the definite answer at Kawasaki jet ski museum online.
Check Battery, Check Fuel
you really shouldnt jump a wake from a boat
A Jet Ski is a watercraft. It's more like a motorbike only in water.
there boats that have a engine on the back of them that causes the boat to have more speed when they accelerate