Minn Kota | Power Prop | High Thrust Trolling Motor Propeller | MKP-37 | 1865022

Product Overview

The Minn Kota | Power Prop | High Thrust Trolling Motor Propeller | MKP-37 | 1865022 is a high-efficiency, tournament-grade replacement propeller designed to deliver maximum propulsion, extra pushing power, and optimal battery efficiency for your Minn Kota trolling motor. Operating as an authentic OEM structural component, this 2-blade prop features an aggressive, high-torque blade geometry designed specifically to move heavy boat hulls through windy conditions, strong river currents, and rolling lake swells. Over multiple seasons of active fishing, original props can become nicked by submerged rocks, scarred by gravel, or warped by heavy wraps of discarded fishing line. These small cosmetic imperfections introduce substantial underwater drag and imbalances, causing your trolling motor to vibrate loudly, drain your batteries prematurely, and lose critical thrust. The MKP-37 restores your lower unit back to factory-fresh efficiency.

Molded from a proprietary, glass-reinforced composite polymer matrix, the Power Prop features an exceptional strength-to-weight ratio. The material is engineered to remain perfectly rigid under full-throttle acceleration, completely eliminating blade flex to translate every ounce of rotational energy directly into forward or reverse movement. A major highlight of the MKP-37 design is its sweeping, extra-wide blade profile, which is highly optimized for slicing through thick freshwater vegetation, hydrilla, and lily pads without bogging down the electric motor. The comprehensive replacement kit comes completely ready for installation, containing the standalone premium black 2-blade propeller, an authentic steel prop pin (shear pin), a heavy-duty brass prop nut, and a premium flat washer, ensuring a complete hardware overhaul during your prop swap.

Key Features

• High-Torque 2-Blade Power Design: Engineered with a wide, aggressive blade geometry that maximizes raw pushing power and open-water acceleration for heavy tournament boat setups.
• Glass-Reinforced Composite Build: Molded from an advanced, high-density polymer matrix that resists impact chipping, warping under heavy load, and structural degradation over time.
• Weed-Slicing Blade Optimization: Swept-back blade edges are custom-angled to cleanly cut through thick hydrilla, lily pads, milfoil, and heavy freshwater vegetation without wrapping or stalling.
• Complete Installation Hardware Kit: Arrives fully loaded from the factory with a replacement steel shear pin, a heavy-duty brass prop nut, and a custom flat backing washer for a tool-free hardware refresh.
• Maximizes Battery Lifespan: Precision-balanced to eliminate lower-unit wobbling and excessive drag, reducing the amp draw on your deep-cycle batteries to extend your runtime on the water.
• Authentic OEM Part Matching: Certified as an original Minn Kota manufacturer accessory, guaranteeing an absolute, perfect physical seat onto your trolling motor's armature shaft.

Compatibility Information

The Minn Kota Power Prop MKP-37 (part number 1865022) features a highly specific compatibility layout centered around the diameter of your trolling motor's lower unit torpedo housing. It is engineered explicitly to fit Minn Kota motors utilizing a 3-5/8 inch motor diameter hub.

This includes extensive compatibility with specific power brackets across the modern **Minn Kota PowerDrive**, **PowerDrive V2**, **Terrova**, **AutoPilot**, and **Maxxum** series motors that carry a **55lb, 65lb, or 70lb thrust rating**. It is critical to note that the MKP-37 **will not fit** smaller 12V 30lb to 45lb thrust motors (which use a 3-1/4 inch hub, like the MKP-2) and it **is completely incompatible** with heavy-duty 80lb or 112lb thrust motors (which utilize a larger 4-inch hub, like the MKP-33 or MKP-38). Always verify your specific motor's thrust rating and hub diameter before completing a replacement order. It is completely rated for use in both freshwater and saltwater motor lines.

Frequently Asked Questions

What is the purpose of the small steel pin included in the prop kit, and how do I replace it?

The small steel pin is called a shear pin, and it serves as a critical mechanical safety fuse designed to protect your trolling motor's internal armature shaft from catastrophic structural damage. When you are running your motor and the spinning prop violently strikes a solid underwater hazard—such as a large rock, concrete boat ramp, or a heavy submerged log—the shear pin is engineered to snap in half intentionally. This break decouples the prop from the engine, preventing the high-impact shock from bending the main steel drive shaft or shattering the internal magnets. To replace it, simply slide the old broken pieces out of the hole in the shaft, slide the new pin in horizontally, and align the groove on the back of the MKP-37 prop directly over the pin.

How tightly should I screw down the brass prop nut when installing the MKP-37?

When fastening the heavy-duty brass prop nut onto the threaded end of your trolling motor shaft, it is vital to tighten it down securely without crushing the components. Using a standard 1/2-inch wrench or a specialized Minn Kota prop wrench tool, tighten the nut clockwise until it makes firm physical contact with the flat washer and the propeller hub, then give it an additional 1/4 to 1/2 turn to lock it in place. Never use a high-powered electric impact driver to tighten the prop nut, as excessive mechanical torque can easily strip the brass threads, snap the armature tip, or crack the composite plastic hub of your brand new propeller.

What is the performance difference between this 2-blade Power Prop and a 3-blade Weedless Wedge prop?

The choice between a 2-blade Power Prop (MKP-37) and a 3-blade Weedless Wedge prop (like the MKP-32) comes down to your primary operating environments and speed tactics. A 2-blade Power Prop features wider, more aggressive individual blades that capture a larger volume of water, making it superior for achieving maximum top-end speed, accelerating quickly, and pushing heavy boat hulls against strong river currents or high wind drift lines. A 3-blade Weedless Wedge prop focuses its geometry on extreme weed evasion, using swept-back curved blades to push away thick vegetation without wrapping, but it sacrifices a slight amount of raw top-end forward thrust to achieve that stealth.

Why is my trolling motor vibrating loudly after installing this new replacement prop?

If your trolling motor exhibits a loud humming noise or heavy physical vibration after installing the MKP-37, it is typically caused by one of two installation alignment issues. First, check to ensure that the internal steel shear pin is sitting perfectly centered inside its shaft slot and has not slid slightly to one side, which will cause the propeller to seat crookedly. Second, inspect the prop shaft itself for any tangled loops of braided fishing line wrapped behind the prop. A buildup of compressed fishing line can push the prop forward out of balance and can quickly destroy the lower unit's rubber oil seals, allowing water to leak into the electric motor compartment.

Can I safely use this black replacement propeller on a white Minn Kota Riptide saltwater motor?

Yes, absolutely. From a purely structural, mechanical, and physical standpoint, the MKP-37 Power Prop is fully compatible with white Minn Kota Riptide saltwater trolling motor models, provided the Riptide motor carries a matching 55lb, 65lb, or 70lb thrust rating with a 3-5/8 inch hub diameter. Minn Kota’s composite props are completely inert and non-metallic, meaning they contain no components that can rust, pit, or suffer from galvanic corrosion in high-salinity coastal bays. The only difference is cosmetic—installing this black prop onto a white Riptide lower unit will create a black-and-white contrast layout, but it will deliver the exact same high-thrust performance on the water.