It really depends on the state that you are in. There are different rules and regulations. In Kentucky, where I live, you have to license "anything" with a trolling motor no matter what (inflatable boat, canoe, etc.) It seems kind of silly though!
typically if the vessel is over 12 feet long, you need to register. even though there is no gas motor.
maybe
You need a boat license if your boat is fitted with an auxiliary motor or an inboard motor. If you are in a canoe, kayak, or rowboat, you do not need a license. Check the website via Google for more information.
You certainly do.
do you need a boat licence for a 5hp outboard
If the motor is over 15 horsepower and over 3.7 metres you would need a boat licence.
McCullom Lake is motorized, but limits the horsepower of a motorboat to only 7.5 h.p. Awesome fishing, you just need a small boat with a small motor (or a large trolling motor).
no you need a boat license no matter how old you are
If it were me, I would purchase a 55 lb thrust motor and it would be a Motorguide. A 55 lb thrust motor will be a 12 volt system. Beyond 55 lb you'd need to move to a 24 volt system that would require two 12 volt batteries for the trolling motor. A 24 volt motor would offer around 80 to 90 lbs of thrust. Unless you're going to use your boat in heavy currents or strong winds, I'd opt for a 55 lb motor.
Yes
To rent a boat you do not normally need a boating license. It will depend on what kind of boat or watercraft you are renting and what state you are in.
Trolling motors do not need to be in the water to run. Though it is generally pointless to run one out of water for more than a test.