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26 lb thrust
20LBS
28 lbs
30lbs
40 pounds
55lb or 70lb.
There is no direct correlation of thrust to horsepower. Horsepower is a measurement of "work" being performed. Thrust is simply a static measurement of force. In other words, "Thrust" and "Horsepower" measure two totally different things.
they have 36 Lbs http://pic20.picturetrail.com/VOL151/1993630/18514168/332000756.jpg
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.
It sounds as though one of the steering cables has lost tension, jumped off the spool, or has broken.
You will need the weight of your boat in lbs, the weight of the people & kit it is expevted to carry and then divide by 70. This will give you the thrust in lbs. For example a total weight of 2500lbs divided by 70 = 35.71, round this up to the nearest whole number is 36. Therefore a trolloing motor of 36lbs thrust is required. Bryan1324
Thrust Capacity is how much thrust it can take :D