Which transom mount trolling motor should you buy?

Weigh the boat fully loaded with motor, battery, fuel, gear and everyone aboard, then plan for 2 to 3 lb of thrust per hundred pounds in normal conditions, rising to 5 lb per hundred in wind or current. A typical two person jon boat loaded to around 800 lb lands comfortably on a 40 to 55 lb 12 volt motor. Run the exact figure through the trolling motor thrust calculator rather than guessing from the boat's length alone.

Up to a point. The Riptide transom line goes as high as 112 lb of thrust at 36 volts, which covers boats that would otherwise need a bow mount motor, and it avoids the cost and deck work of adding a bow bracket. The tradeoff is steering: a transom motor is tiller steered by hand from the back of the boat, which is less precise for holding a tight position than a bow motor pulling from the front with GPS anchoring.

A transom sits much closer to the waterline than a bow deck does on most hulls, so the same formula, measuring down to the waterline and adding 16 or 20 inches, produces a shorter answer at the transom. A typical jon boat or canoe transom motor runs 30 to 36 inches where an equivalent bow mount motor on the same boat might need 42 to 48 inches, purely because of where each one is mounted.

Not always. Some budget brands sell saltwater rated transom motors at close to freshwater pricing, using corrosion resistant hardware and coated housings without the premium a name brand saltwater line charges. The genuine Minn Kota Riptide transom line costs considerably more than the freshwater Endura line at the same thrust rating, so a saltwater rated motor from a budget brand is worth considering specifically for boats that only touch brackish or salt water occasionally.

Not worse, simpler. A mechanical motor with five forward speeds has no electronics to fail and is often the more reliable choice for occasional use or long term storage between seasons. A variable speed motor with Digital Maximizer technology extends run time at low, slow trolling speeds specifically, which matters more to anglers who troll for hours at a stretch than to someone using the motor mainly to reposition between casts.

Yes. ABYC E-11 requires overcurrent protection within 7 inches of the battery positive terminal regardless of where the motor itself is mounted, extended to 40 inches when the conductor runs inside a sheath. The rule protects the cable between the battery and the fuse, not the motor, so mount type has no bearing on whether a breaker is needed. A 40 or 45 lb transom motor still draws real current at full thrust and needs the same protection as a bow mount motor of the same size.