Stop lock trolling motor accessories help secure your motor during transit and keep it at a precise depth while in use. This guide highlights five reliable options, who they’re best for, and how to choose. It’s ideal for anglers, boat owners who tow often, and anyone needing stable, no-slip motor positioning on freshwater or saltwater craft.
Summary table of selected products:
| Product | Brand | Best For | Key Feature |
|---|---|---|---|
| Yourour 2991521 Hand Control Depth Collar | Yourour | Hands-on depth control on Minn Kota trolling motors | Cam Lock depth collar for quick, secure depth changes |
| Bonbo 2991521 Hand Control Depth Collar | Bonbo | Nebular compatibility for freshwater and saltwater motors | Steel and plastic build with reliable locking |
| SeaSense Outboard Motor Lock | SeaSense | General outboard motor security up to 40 HP | Brass lock, hardened steel tube |
| HZEL Hydraulic Steering Lock | HZEL | Hydraulic steering protection during trailering | Adjustable, durable 4-inch lock |
| Newport Vessels Trolling Motor Tilt Lock Plate | Generic | Secure tilt stabilization for Newport Vessels motors | Lightweight PETG plate with UV resistance |
Yourour 2991521 Hand Control Depth Collar

Best for Minn Kota trolling motors with hand control depth collars. This collar fits shafts with a 1-1/8” diameter and is designed to change depths quickly, locking securely at the desired value. It’s built from premium steel and resilient plastic, supporting both freshwater and saltwater use. Suitable for anglers who rely on precise depth control for long trolling runs.
Best for: Deep-water trolling and setups where quick depth adjustments are critical. Choose this if you own a Minn Kota model listed in the compatibility range and want a robust lock that resists corrosion.
Limitation: Installation may require familiarization with the collar’s locking mechanism to ensure a tight fit on the shaft.
Bonbo 2991521 Hand Control Depth Collar

Better for a broad range of Minn Kota freshwater and saltwater motors, including both transom and bow mount hand control motors. It fits 1-1/8” shafts and uses a combination of premium plastic and steel for wear and corrosion resistance. The collar locks the motor’s depth reliably, helping prevent drifting away from the planned trolling depth.
Best for: Boat owners seeking a versatile, compatible depth collar that works across multiple Minn Kota families. Avoid if you require a collar with a specialized feature set beyond depth locking.
Limitation: The collar’s effectiveness depends on a snug shaft fit and correct alignment during installation.
SeaSense Outboard Motor Lock

Designed to secure most outboard motors up to 40 HP, this lock uses marine-grade brass and a hardened steel tube. It’s a straightforward, durable solution for trailering and storage, helping reduce motor movement and potential damage during transit. It’s particularly suited for boaters who tow frequently or park in windy, rough conditions.
Best for: General trailer use where a robust lock is preferred to deter movement and theft risk. Limitation: Not specified to fit every model; verify compatibility with your outboard’s mounting hardware before purchase.
SeaSierra Boat Outboard Motor Hydraulic Stop Lock

This rubber-black hydraulic steering stop locks the engine during trailering and transport. It’s typically compatible with a wide range of outboard engines such as Yamaha, Mercury, Johnson Evinrude, Suzuki, and Honda. The 4-inch size helps stabilize the engine and protect steering components from shaking during transit.
Best for: Boat owners needing a simple, adaptable stop to limit oscillation across various motor brands. Limitation: Specific compatibility can vary by motor model; check clearance around steering cylinders before installing.
HZEL Hydraulic Steering Lock

This 4″ steer stop is designed to lock and secure the outboard engine, reducing oscillation during towing. It uses a tough, adjustable design that fits most steering cylinder rods and helps prevent wear on the steering system during movement. It’s a practical choice for frequent trailering and rough transport conditions.
Best for: Users who need a flexible, adjustable lock that won’t scratch the engine or steering components. Limitation: Material is TPE; ensure the lock remains secure under heavy road vibrations over time.
Newport Vessels Trolling Motor Tilt Lock Plate

Specifically designed tilt lock plate for Newport Vessels trolling motors, this plate provides a secure tilt lock to maintain motor position when not in use. Made from durable PETG plastic, it resists impact and UV exposure, ensuring long-term stability in marine environments. It’s compact and easy to store as a spare part.
Best for: Newport Vessels users needing a dedicated tilt-lock solution that resists sun and salt exposure. Limitation: The plate’s effectiveness depends on proper fit with Newport Vessels tilt mechanisms.
Buying Guide: Key Considerations For Stop Lock Accessories
- Intended use: Determine whether you need a depth collar for precise trolling depths or a general motor lock for trailering stability.
- Compatibility: Check shaft diameter (often 1-1/8”) and motor models to ensure proper fit across freshwater and saltwater variants.
- Material quality: Look for corrosion-resistant metals (stainless steel) and durable plastics that stand up to salt, UV exposure, and wear.
- Installation ease: Some collars and locks require minimal tools; others may require alignment with mounting hardware.
- Environment: Consider how often you trailer and the typical conditions; harsh environments benefit from robust, water-resistant designs.
- Security vs. convenience: Depth collars emphasize lock accuracy; general locks prioritize immediate stability during transport.
FAQs
- What is a stop lock for trolling motors?
A stop lock is a device designed to hold the trolling motor in a fixed position or depth, reducing movement during trailering or while in use.
- Can depth collars fit all Minn Kota models?
Most depth collars fit a range of Minn Kota models, but always verify shaft diameter and model compatibility before purchasing.
- Are these locks suitable for saltwater use?
Yes, many are designed for both freshwater and saltwater environments, but corrosion resistance varies by material.
- Do I need a tilt lock plate if I already have a depth collar?
Tilt locks and depth collars serve different purposes. Tilt locks stabilize the motor’s tilt, while depth collars control the depth.
- How should I secure a lock during transport?
Follow manufacturer instructions, ensure snug fit, and check the locking mechanism after securing to prevent loosening during transit.