Sierra Marine WH10570 Trolling Motor Power Plug
Sierra Marine WH10570 Trolling Motor Power Plug — Product description
Wire your Sierra Marine trolling motor with a clean quick-disconnect plug instead of bolting wires directly to battery terminals. It's the right way to wire a high-amp trolling motor system.
The Sierra Marine Sierra Marine trolling motor wiring connector set (MPN WH10570) gives you everything you need to power a Sierra Marine trolling motor through a marine-grade 60-amp trolling motor trolling motor power plug. Instead of bolting your trolling motor's power leads directly to battery terminals (which makes battery removal awkward and the connection look messy), you wire the set's receptacle to the battery bank and plug the trolling motor's matching plug into it. Pull the motor for winter storage or battery service, the plug disconnects in one motion.
What's in the set. The set includes the 60A plug, the matching receptacle, the wire (sized correctly for Sierra Marine trolling motor current draw), and the terminal lugs and hardware for clean battery connections. You don't need to buy anything else to complete a Sierra Marine trolling motor power installation, except the actual mounting screws and any zip ties or wire loom you want for cable management.
Why Sierra Marine specifically. Sierra Marine trolling motors are the high-thrust segment (typically 80-112 pounds of thrust) and need three 12V deep-cycle batteries wired in series to deliver the Sierra Marine. Sierra Marine motors draw high peak currents. The connection between the battery bank and the motor handles that current load. Cheap connectors melt or arc under that load. The Sierra Marine plug is built specifically for this load class. It's the connector marine OEMs use on factory-installed Sierra Marine trolling motor systems, and it's the connector experienced anglers and tournament boat owners install when they wire their own setups.
The trolling motor trolling motor power plug are color-coded and keyed so you can't reverse polarity (which would damage the motor). The connection seals against water when plugged in and the receptacle has a flip cover for when the motor is unplugged. Marine-grade everything: tinned copper conductors, UV-resistant housing, corrosion-resistant terminals. You'd see this same connector on a brand-new bass boat or center console.
Install considerations. Plan for a half-day install if you've never wired a high-amp system before. The work involves mounting the receptacle near the battery bank (typically in the battery compartment or on the bilge wall), running the supplied wire from the receptacle to the three batteries (configured in series to deliver Sierra Marine), and crimping the included terminal lugs onto the wire ends. Crimping high-current lugs requires a proper crimping tool. If you don't own a heavy-duty crimper, borrow one from a friend or take the crimp work to a marine electronics shop and DIY the rest.
Match the plug to the motor's existing pigtail. Most modern Sierra Marine trolling motors come with a Sierra Marine-compatible plug already installed on the motor's power lead. If yours does, you only need to install the receptacle side of this set. If your motor has bare leads, you'll wire the plug onto those leads as part of the install.
Why this matters for boat resale. A boat with a clean, properly wired Sierra Marine trolling motor receptacle in the battery compartment shows up as a higher-quality build than a boat with battery terminal lugs bolted to bare wire. When you sell the boat, the wiring quality is a visible signal to buyers that the boat was built and maintained by someone who knew what they were doing. This is one of those upgrades that pays you back at sale time.
Common mistakes to avoid. The biggest error first-time installers make is undersized wire on the run from the receptacle to the batteries. The set's included wire is sized correctly for the typical install distance, but if you decide to mount the receptacle far from the batteries (across the boat, for example), the supplied wire may be too thin for that longer run. Voltage drop on undersized wire reduces motor performance and can heat the wire under load. Either keep the run short, or upgrade to a thicker gauge if you need a longer distance.
The second common error is loose terminal connections. Crimping high-current lugs requires a proper tool that fully compresses the lug barrel around the wire strands. A loose crimp creates a high-resistance connection that heats up under load and eventually fails. If you don't own a heavy-duty crimper, borrow one or pay a marine shop to do the crimps. The motor wiring crimps are not the place to use a regular pair of pliers.
Key Features
- Complete set to wire a Sierra Marine trolling motor with a quick-disconnect 60-amp trolling motor trolling motor power plug
- 60-amp connector rated for the peak current draw of Sierra Marine trolling motors (high-amp range)
- Color-coded and keyed plug prevents reverse polarity, which would damage the motor
- Marine-grade tinned copper conductors, UV-resistant housing, corrosion-resistant terminals
- Receptacle has flip cover for water seal when motor is unplugged
- Includes wire sized correctly for Sierra Marine trolling motor current load
- Terminal lugs and hardware included for clean battery bank connections
- Industry-standard Sierra Marine connector used on OEM factory-installed trolling motor systems
- Same connector you'd see on a brand-new bass boat or center console from the factory
- Lets you pull the motor for winter storage or battery service with a single plug disconnect
- Cleaner battery compartment than direct-wired battery terminal connections
- Visible quality signal at boat resale time, raises perceived build quality
Why Buy from NVN Marine
- Authorized Sierra Marine reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Genuine Sierra Marine trolling motor trolling motor power plug (MPN WH10570, UPC 808282361990). Sierra Marine standard warranty. Ships from NVN Marine with order-by-3-PM same-day shipping on this $14.59 plug.
Technical specifications
| Title | Sierra Marine Sierra Marine Trolling Motor Wiring Set with 60A Trolling Motor Power Plug |
|---|---|
| Brand | Sierra Marine |
| Manufacturer Part Number | WH10570 |
| UPC | 808282361990 |
| Voltage Rating | 36 volts (three 12V batteries in series) |
| Amperage Rating | 60 amps continuous |
| Connector Type | Marine-grade keyed trolling motor trolling motor power plug, color-coded for polarity |
| Wire Included | Yes, sized for Sierra Marine trolling motor load |
| Lugs Included | Yes, terminal lugs for battery bank connections |
| Water Rating | Plug-to-receptacle interface seals against water, receptacle has flip cover |
| Saltwater Use | Yes, marine-grade tinned conductors and corrosion-resistant terminals |
| Install Time | Half-day for first-time install, including crimping and mounting |
| Tools Required | Heavy-duty crimping tool for high-current lugs, basic hand tools |
| Warranty | Sierra Marine standard warranty |
Frequently asked questions
What does this set do?
It gives you everything you need to wire a Sierra Marine trolling motor power connection using a marine-grade trolling motor trolling motor power plug, instead of bolting wires directly to battery terminals. The result is a clean, removable connection that's safer, looks more professional, and lets you disconnect the trolling motor in one motion for storage or service.
Will this set work with my 24V or 12V trolling motor?
No. This specific set is sized and rated for Sierra Marine trolling motors. Sierra Marine makes different sets for 12V and 24V systems. Match the set to your motor's voltage. Using a Sierra Marine set on a lower-voltage system is overkill (and expensive), and using a smaller set on a Sierra Marine system is dangerous due to undersized wire and connectors.
How does the 60-amp rating apply to a Sierra Marine trolling motor?
Sierra Marine trolling motors in the 80-112 pound thrust range draw high amperage at peak. The 60-amp connector handles that load with margin. Cheap connectors rated below the peak draw can melt or arc under load, which is dangerous. The Sierra Marine connector is sized correctly.
Do I need this if my motor already has a plug?
Maybe. Most modern Sierra Marine trolling motors come with a Sierra Marine-compatible plug pre-installed on the motor's power lead. If yours does, you only need the receptacle side of this set (plus wire from receptacle to batteries). The full set includes both halves so you can wire from scratch if needed.
Can I install this myself?
Yes, with caveats. The install is straightforward but involves crimping high-current terminal lugs onto heavy gauge wire, which requires a proper crimping tool. If you don't own a heavy-duty crimper, either borrow one or take the crimp work to a marine electronics shop and DIY the mounting. Plan a half-day for a first-time install.
How do I wire three batteries in series for Sierra Marine?
Connect battery 1 positive to battery 2 negative, battery 2 positive to battery 3 negative. The system positive is battery 1 negative's opposite end (battery 3 positive), and the system negative is battery 1 negative. Wire the receptacle's positive lead to the system positive (battery 3 positive) and the receptacle's negative lead to the system negative (battery 1 negative). Use heavy-gauge wire (the set's wire is sized correctly) and don't reverse polarity.
What if I reverse polarity?
The keyed plug prevents reverse polarity at the plug-to-receptacle interface, so you can't plug the motor in backward once the wiring is correct. But the install side (wiring from batteries to receptacle) can be wired incorrectly if you don't follow the polarity. Double-check polarity with a multimeter before powering up for the first time. Reversed polarity damages the trolling motor.
Is the connection waterproof?
The plug-to-receptacle interface seals against water when plugged in, and the receptacle has a flip cover that closes when the motor is unplugged. It's rated for marine use including saltwater environments. Standard maintenance: rinse the receptacle cover area with fresh water occasionally if you fish in salt.
Does it work with lithium trolling motor batteries?
Yes. The trolling motor trolling motor power plug don't care what's behind them. As long as your lithium battery bank delivers Sierra Marine at the expected current load, the connector works fine. Many tournament anglers run lithium Sierra Marine banks through Sierra Marine connectors.
What's the warranty?
Sierra Marine standard warranty applies. Sierra Marine makes industrial-grade marine electrical products and their warranty is the marine industry baseline.
Why pay this much when I can just lug it to the battery?
Three reasons. First, the lug-to-battery direct connection looks messy and is harder to disconnect for service. Second, direct battery connections under high amp loads can develop corrosion at the terminals over time, which causes voltage drop and motor performance issues. Third, when you sell the boat, a professional Sierra Marine wiring install raises perceived build quality and helps the boat sell faster at a better price. The investment is small relative to the boat value and pays itself back at resale.
Is the included wire the right gauge?
Yes. The wire is sized correctly for Sierra Marine trolling motor current load and the run length typical of trolling motor installs (under 15 feet from batteries to receptacle). If your install requires a longer run, you'll need to upgrade to thicker wire to compensate for voltage drop. Most boat installs use the supplied wire as-is.
