Shaft
Choosing the correct shaft length for your trolling motor is important so that the angler's electric motor does not cavitate, creating fish-spooking Noise.
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The rule of thumb is that the top of the motor section should be submerged 12". In general, shaft length selection is more critical with bow-mount motors versus transom-mount motors. Most boat transoms are similar in their distance to the water, and Minn Kota’s standard Transom shaft lengths should be adequate.
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With bow-mounted motors, there is much greater >Variation in shaft length requirements. Measure down from the mounting surface of the Transom or Bow to the water level. Add 5" to >Waterline measurement for fishing in rough water. Add 12" to >Waterline measurement for steering a hand control motor while standing.
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Use this measurement and the tables below to find the appropriate shaft length:
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