Common Trolling Motor Issues And How To Prevent Them

Image: minn kota

Trolling motors are an indispensable tool for many New Zealand boaties, offering precision and quiet operation that’s perfect for fishing and exploring our unique waterways. However, these motors can face several challenges if not properly maintained.

At Mariner, we’ve seen a rise in claims related to trolling motor damage—many of which can be avoided with a little care and attention. Here’s a guide to the most common issues and how to keep your trolling motor in top condition while enjoying Aotearoa’s waters.

1. Incorrect Wiring or Stray Currents

The Problem: Faulty wiring or stray currents can compromise the safety and efficiency of your trolling motor. These issues can also increase the risk of damage to your boat’s electrical system.

How to Avoid It:

• Get your trolling motor inspected by a certified service agent to ensure it’s wired correctly and complies with the manufacturer’s specifications.
• Regular checks and professional servicing will ensure your unit is operating efficiently, prolong the battery life, and ensure no stray current is present. 

Handy Tip: Always refer to the manufacturer’s manual for wiring guidelines specific to your motor’s make and model.

2. Accidental Deployment While Underway or Towing

The Problem: Trolling motors are sometimes accidentally deployed while the boat is in motion. This can cause significant damage to the motor.

How to Avoid It:

• Always ensure your trolling motor is securely stowed when not in use.
• Follow the user manual’s instructions, as each brand may have different stowing procedures.
• For extra peace of mind, use a safety strap or locking mechanism to keep the motor in place.

3. Fishing Line Wrapped Around the Propeller

The Problem: Fishing line or other debris can get caught around the propeller, potentially damaging the seals and allowing water to enter the motor housing.

How to Avoid It:

• After each use, check the propeller for any fishing line or debris.
• If you find any, stop using the motor immediately and remove it.
• To be safe, have your motor inspected by a professional to ensure the seals are intact.

Local Insight: New Zealand’s abundant fishing spots mean you’re more likely to encounter fishing line debris. Make inspecting your prop a regular habit.

4. Grounding or Impact Damage

The Problem: Grounding or striking underwater objects can cause hairline fractures or cracks in the trolling motor’s housing. This damage often compromises the water seal, leading to water ingress and internal damage.

How to Avoid It:

• Stay vigilant when navigating New Zealand’s coastal waters, lakes, and rivers—especially in shallow areas or regions known for submerged hazards.
• If your trolling motor hits an object or sustains an impact, remove it from the water immediately and inspect it for cracks or visible damage.
• If you suspect damage, have it serviced by a professional to prevent further issues.

Safety Tip: Even minor fractures can cause significant damage if water enters the motor housing, so it’s always better to be safe than sorry.

Protect Your Investment

By taking a few simple precautions, you can prevent many common trolling motor problems and keep your unit running smoothly for years to come. Regular inspections, proper stowing, and prompt responses to potential damage are crucial for ensuring your motor performs well in New Zealand’s diverse and challenging waters.