No, the propeller will only work if the engine is running.
A rubber band boat works much like a rubber band airplane. First you need to build the boat itself. Then you need to make a propeller. The propeller shaft needs to run through the inside of the boat, not below the boat. With the prop below the water. The propeller shaft should not go the full length of the boat. About halfway through put a loop in the shaft. Then to the front of the boat attach a rubber band. Then run the rubber band through the loop in propeller shaft. Now twist the prop and the rubber band should twist around and around. When it's good and tight let go and the propeller should spin. Allowing the boat to move forward in the water. Mind you the shaft needs to be a thin piece of metal, as it will be difficult to make it water tight.
The propeller.
Prevent Propeller Strikes
The propeller would induce more drag if it was locked. Keep it spinning and you will lessen the drag
the propeller turns and the boat goes
Prevent propeller strikes.
propeller
propeller
My boat was marooned as an old rope got wrapped around the propeller.
The propeller clearance of a ship, is the length a propeller extends below the hull (bottom) of a ship or boat.
Moter
In Boston one can purchase replacement parts for a boat propeller in any boat store. Some of these stores include Boston Whaler and Crestliner Boats.