Winch Bit
Get a Winchbit from the link below and use a cordless electric drill. They recommend the cordless 18 volt Milwaukee because the torque is about 600 inch lbs. I cut off the stud, welded a stud that would fit a 3/8" bit and bought a DeWalt 3/8 18 volt cordless right angle drill. The torque on it is about 300 to 350 inch lbs if my memory is correct. I can furl the jib, use to bring out and furl my mainsail, use to raise and lower my 66 lb dingy from the front deck to the water and back. Not strong enough to raise someone up the mast. To do that, you need to buy the 18 volt Milwaukee. There is a company that packages the Milwaukee with the winchbit as a package with a neoprene cover that protects against salt air. The unit sells for about $875 to $950. This is much higher than the winchbit and either of the drills.One potential problem is you must be careful not to rip something apart with either unit as it is not likely using the manual winch handle because you feel the resistence, but with the winchbit, you do not.