I came across a free hull of a 1995 Seadoo SPX that came with the jet pump. I thought it would be a fun project to turn it into a mini boat that my kids can ride around in, so I chopped it up.
Since a seadoo 587 engine runs at about 6100 RPMs under normal conditions with the pump loaded, I figure if I can get half of that, it should be good for kids to put around in.
Right now, I've got 2 motors as options. A treadmill Motor that runs at 7099 rpms if I get 130v DC to it or a 36V DC motor that runs at 3600 RPMS.
I'm leaning toward the 36v motor, because it's bigger, and I assume it provides more torque. Plus, it will be easier to get 36v out of 3 12v batteries instead of trying to get 130v to the treadmill motor.
I'm still unsure about the type of controls I'll need, any thoughts on that from you would be helpful.
My next step is to get a coupler and try to fit the motor shaft onto the seadoo jet pump.
Here are the motors I'm looking at:
Here's a video of us getting started on the project: