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HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness - 1,600 psi

HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness - 1,600 psi

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Our Price: $1,222.54
Brake Actuator
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Shipping Weight: 21 lbs
HS381-9067 - Disc Brakes Hydrastar Brake Actuator
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Vented, marine-grade aluminum electric-hydraulic actuator lets you use your brake controller (sold separately) to activate your trailer's hydraulic disc brakes. Includes wiring, 7-way harness, and breakaway. Brake lines sold separately. Call 800-298-1624 to order Hydrastar brake actuator part number HS381-9067 or order online at etrailer.com. Free expert support on all Hydrastar products. Guaranteed Lowest Price and Fastest Shipping for HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness - 1,600 psi. Brake Actuator reviews from real customers.
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  • Reviews (28)
  • Q & A (94)
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  • Why etrailer?

Hydrastar Brake Actuator

  • Electric-Hydraulic Brake Actuator
  • Disc Brakes
  • Hydrastar
  • 1600 psi

Vented, marine-grade aluminum electric-hydraulic actuator lets you use your brake controller (sold separately) to activate your trailer's hydraulic disc brakes. Includes wiring, 7-way harness, and breakaway. Brake lines sold separately.


  • Electric-over-hydraulic brake actuator activates your trailer's hydraulic brakes when you apply the brakes in your tow vehicle
    • Brake controller (sold separately) is required to send signal from tow vehicle to actuator when brakes are applied
    • Included 7-way trailer connector transmits signal from brake controller
  • Improved functionality when compared with surge brake couplers
    • Faster response time - trailer brakes are triggered when you apply brakes in tow vehicle, as opposed to when trailer pushes against hitch ball
    • No need to manually lock out brakes when you back up
    • Trailer brakes can be intentionally activated when you reverse
    • Manual override on brake controller can be activated so you can engage the trailer brakes without having to apply your vehicle brakes
  • Electronic, proportional pressure valve ensures that braking is smooth and effective
  • Vented end plate releases pressure, moisture, and heat in order to protect the internal components
    • Allows actuator to be mounted in places where most actuators would overheat
  • Built-in bleeder screw on actuator lets you easily flush air out of your brake lines
  • Durable extruded aluminum construction provides superior corrosion resistance
    • Marine-grade gasket and stainless steel hardware make actuator ideal for marine use
  • Breakaway system activates your trailer's brakes if the trailer disconnects from the tow vehicle
    • Battery charger ensures the system's battery is always charged
    • Weather-resistant polymer case is top loading for easy access from above
    • Built-in mounting bracket offers simple installation
  • Insulated 7-way, RV-style trailer connector is molded to protect wires and terminals
  • Weatherproof, corrosion-resistant 7-pole junction box protects wires, eases installation, and makes diagnostics simple
    • Ring terminals and butt connectors included for connecting wiring
  • Wire loom protects wiring from the elements and allows wires in and out along any point of the loom for easy installation
  • Mounting pads have adhesive backing for securing cable ties
  • Kit includes:
    • HydraStar marine electric-over-hydraulic actuator (Model MHBA-16)
    • Breakaway system
    • 7-Way trailer connector
    • 7-Pole junction box
    • 6' Split wire loom
    • 4 Mounting pads
    • Mounting and wiring hardware
  • DOT compliant
  • Made in the USA


  • Application: single-, tandem-, or triple-axle trailers with disc brakes
  • Maximum output pressure: 1,600 psi
  • Power: 12V DC
  • Hydraulic port size: 3/16"
  • Actuator dimensions: 11-3/4" long x 3" wide x 7-3/8" tall
  • Actuator wire configuration:
    • Black: 12-volt power
    • Blue: brake controller
    • Yellow: breakaway
    • White: ground
  • Battery capacity: 5 amp-hours
  • Breakaway battery case dimensions: 5-7/16" long x 4-1/4" wide x 4-1/4" tall
  • Battery dimensions: 3-7/8" long x 3-1/2" wide x 2-11/16" tall
  • Breakaway switch lead wire length: 7-1/2"
  • Trailer connector length: 6'
  • Trailer connector wire gauges:
    • Black/white: 10 gauge
    • Blue: 12 gauge
    • Brown/red/green/yellow: 14 gauge
  • Junction box dimensions: 6-3/4" long x 3-1/2" wide x 2-1/4" tall
  • Split wire loom length: 6'
  • 2-Year limited warranty

Note: Do not power wash the HydraStar actuator or take it through a commercial car wash. High-pressure water may damage the seals on the actuator.

The HydraStar electric-over-hydraulic trailer brake actuator applies pressure to your trailer's hydraulic brake system in response to the electrical signals sent from your in-cab brake controller. As a result, your trailer's hydraulic brakes will be activated every time you apply the brakes in your vehicle or press the manual override on your controller.

Pair the HydraStar electric-over-hydraulic actuator with your trailer's disc brakes to get the best possible braking setup. With disc brakes, you already have more consistent braking at higher speeds and a shorter stopping distance than you'd get with drum brakes. In addition to more reliable braking, you also have less cost to maintain the brakes as there are fewer moving parts. Combine these benefits with an electric brake controller and you'll get greater control over your already superior brakes, providing you with the best braking performance.

HydraStar Electric-Over-Hydraulic Actuator vs. Standard Surge Brake Actuators

With the HydraStar electric-over-hydraulic actuator, you can get all the benefits of towing with an electric brake controller while using hydraulic brakes. Because this actuator will activate according to the settings you have chosen for your brake controller (sold separately), you will have more control over when and how your trailer brakes engage. Depending on the features of your brake controller, you may be able to control both the rate and intensity with which your trailer's brakes activate. You can also use the manual override on your brake controller, which allows you to engage the trailer brakes without having to apply the brakes in your vehicle. And perhaps most impressive, if you have a proportional brake controller, your brakes will be activated with an intensity that matches the braking speed and power of your rig.

This pump-and-motor-based system increases response time compared with traditional actuators because the trailer brakes are triggered when you apply the brakes in the tow vehicle, as opposed to when the trailer pushes against the hitch ball. This not only gives you faster, more efficient braking, but it also eliminates the pushing sensation that occurs in setups that use standard surge brake actuators.

HydraStar actuators are also beneficial because, unlike standard surge couplers, they allow you to activate your brakes when reversing down an incline, such as a boat ramp. Having the ability to brake in reverse gives you more control and prevents wear on your tow vehicle.

HydraStar Installation

Hydrastar Installation Diagram

This HydraStar electric-over-hydraulic brake actuator will give you years of trailer-stopping performance. The actuator mounts on your trailer's frame with the included stainless steel hardware. The included 7-pole junction box with color-coded studs makes it simple to splice into your trailer's wiring and to connect the provided 7-way trailer connector. Once the actuator is correctly wired, you can connect your trailer's hydraulic brake lines to the 3/16" female port. Lines and fittings are sold separately.

Durable, Marine-Grade Construction

The HydraStar Marine actuator is ideal for use on boat trailers. Just like other HydraStar electric-over-hydraulic actuator models, this system is built of extruded anodized aluminum for superior corrosion resistance. The weathertight seals protect internal components from the elements. The HydraStar Marine actuator also features marine-grade gaskets and stainless steel hardware that won't rust. These extra features make it perfect for marine applications.

This actuator also has a vented end plate that releases pressure, moisture, and heat to help prevent any internal damage. Unlike models that are unable to release heat and pressure, this vented actuator can be safely mounted inside of a compartment on your trailer. As a result, this actuator is great for gooseneck and fifth-wheel trailers where finding space on the tongue can be nearly impossible.

Breakaway Kit

Required by law in most states, a breakaway system will activate your trailer's brakes in the unlikely event that your trailer disconnects from your tow vehicle. This kit wires to the included battery and to the HydraStar actuator. If your trailer separates from your tow vehicle, the breakaway kit signals the actuator to apply the brakes.

Brake Controller Compatibility

Not all electric trailer brake controllers will work with this electric-over-hydraulic brake actuator. See the following table to determine compatibility with common models of brake controllers. For best performance, it is recommended that you use an aftermarket electric brake controller rather than an OEM factory-installed controller.

ManufacturerVehicle Years/Controller ModelsCompatibleCompatible if Used with HBA-CAM
Brake ControllersDraw-TiteActivator (5100)Yes
Activator II (5500 or 5510)Yes
Activator III (5520)Yes
Activator IV (5504)Yes
HayesEnergize III (81741B)Yes
Energize III+ (HA81742B)Yes
Energize XPC (HA81745)Yes
Engage (HA81760)Yes
G2 Brake Boss (81792BB)Yes
Syncronizer (HA81725)Yes
Endeavor (81770)Yes
Genesis (HA81790)Yes
Blackbird (HA81726)Yes
HopkinsImpulse Digital (47325)Yes
Insight (HM47297)Yes
Brake Force (47225)No
Reliance (47284)No
Agility (47294 or 47295)No
MaxbrakeBrake ControllerYes
RedlineRedline TA900Yes
TekonshaProdigy (90185)Yes
Prodigy P2 (90885)Yes
Prodigy P3 (90195)Yes
Primus IQ (TK90160)No
PowerTrac (39523)Yes
Voyager (39510 or 9030)Yes
ValleyVA32812 BlackbirdYes
VA32811 PhantomYes

381-9067 Cargo Towing Solutions (formerly Carlisle) Hydra Star Marine Surge Brake Conversion Kit - 1600 psi - Model MHBA-16-CON

Item # HS381-9067

Customer Reviews

HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness - 1,600 psi - HS381-9067

Average Customer Rating:  4.8 out of 5 stars   (28 Customer Reviews)

Vented, marine-grade aluminum electric-hydraulic actuator lets you use your brake controller (sold separately) to activate your trailer's hydraulic disc brakes. Includes wiring, 7-way harness, and breakaway. Brake lines sold separately.

- HS381-9067

The product seems to be of high quality. Easy to lay out and with some referring back to blueprints it was easy install . My biggest problem was wire color did not match. But a trouble light solved the equation . 2019 boat trailer I didn’t know there were different color codes . Still took a few hours to do it right. Pulled the boat 125 miles each way from home to lake and was pleasantly surprised at the steady brake response . So much better than surge brakes .

- HS381-9067

Awesome product. Would buy again and again. Easy set up. Bought this with kodiac disk brakes. I have a triaxle snowmobile trailer and also bought their triaxle line kit. Easy to install. Only problem was trailer wiring did not match up with the supplied plug. The plug was correct not the trailer. Easy fix though. Only other problem was 100% my fault. The disk brakes DO NOT come with bearings. They should. Would have saved me having to order them. Local auto supply shops did not not have six bearings and seals. If you have a drum brake trailer I would buy this just asap. Hit the truck brakes and the trailer stopped the truck. Had to reduce the power to the trailer. Slide the trailer brake lever and all six tires smoke.

- HS381-9067

It took a lot longer to install the unit than I thought, and I am mechanically and electrically competent. Being there is no mounting hardware I had to purchase several bolts and fasteners to securely attach everything to my trailer. The color coding on the wire from the plug is not standard with anything. I found out the hard way and had to rewire the lights, brakes, and signals. After two days of constructing and installing the bracket and unit, I finally got to test it. It works great so far and much smoother and controllable than my old surge coupler. etrailer promptly sent everything in a strong box and it arrived in only a few days to Alaska from the date I placed my order. Great so far!

- HS381-9067

The actuator worked great, the backup battery lost it’s charge after a week. I had to connect my battery charger to charge it back up. It took a couple of hours to charge to get the charge indicator. to turn green.

- HS381-9067

I've had the Hydrastar system on my trailer now for over a year now with now issues. The brakes work much better than they did before. Easy installation and great service from etrailer

- HS381-9067

I waited several months after the purchase to write a review. This was a great addition to my boat trailer and worth every cent. I have driven hundreds of miles this year with the trailer and this product does make a huge difference with trailer stopping power and control. I tow a 24ft cabin cruiser on the interstate with crosswinds and semi-trucks that would cause the trailer to sway a little, it was very convenient and reassuring to able to engage the trailer brake to help that out the sway in the trailer. The video provided a lot of help and was easy to follow. Install took a couple of hours, the hardest thing was finding a brake line connector in stock from the local auto parts stores. Plus this makes bleeding the brakes super easy too!

- HS381-9067

Awesome system. As described and makes trailering my 12k boat easy. Will never have a trailer without this system. Make sure you check your brake lines and caliper seals. This system works great and will find weak point in your system if you have one. Install was also easy, great video available for install!

- HS381-9067

It was simple to install and has worked exactly as I expected.

- HS381-9067

Install was easy. Works like a dream

- HS381-9067

Etrailers catalogue provided a complete & accurate description of the 8 items purchased. Placing the order by phone was fast & efficient. Items arrived within 4 working days, no tax no shipping charge. Professional all around.

The EOH braking system works perfectly. You are my supplier of choice ifwhen I need additional trailer parts on the future.
Pat M - 11/21/2017

- HS381-9067

- HS381-9067

Great product, replaced the Dexter model , and it works just as good if not better than the Dexter one. I have had this thing totally submersed in water because on my boat trailer there is no place where it doesn’t get submersed in water. Still works great, wiring and install was a breeze, I did it all the morning we left for the lake.

- HS381-9067

The product was great, arrived in a timely manner and was complete. The installation video from etrailer.com was spot on and really well made. My only negative is that the self tapping screws which come with the kit are absolute garbage almost every one of them broke off and the heads are really too small for the size of the holes in the actuator. Recommend you drill and tap each hole and install stainless hardware toss the self tapper in the trash.

- HS381-9067

This item is nothing but the truth!!! Easy to install and work great on any hydraulic brake system!!!!

- HS381-9067

This is great. Easy to install. I put mine in a trailer box to help secure it better just incase. I immediately noticed a huge difference over the surge brakes. I also pull a 5th wheel and wanted the same braking system on my boat trailer. Highly recommend.

- HS381-9067

Product works very well, much better than surge brake system. Package arrived well packed. Have used etrailer numerous times, always great results!

Working great, fine product
Wallace B - 01/25/2019

- HS381-9067

So far this product seems to be working excellent. Installed on my 2019 Dodge Ram 1500. Installation went very well, exactly as described on the video. Lori did an excellent job of helping me place my order and followed up with me to make sure I recieved everything I needed to complete the installation. I would recomend this product.

- HS381-9067

No issues with electric over hydraulic brake controller

- HS381-9067

- HS381-9067

- HS381-9067

Terrific quality, fair price, excellent service.

- HS381-9067

Breaking system works extremely well weather I'm pulling my dozer or empty can stop on a dime but recently have a condenser put on my truck and now my fine adjustment is messed up but that not the system

- HS381-9067

Item shipped in good order nothing was damaged. Everything I was hoping it would be.

- HS381-9067

Delivered on time. Just one thing, the vent cap was damaged in freight. Easily replaceable.

- HS381-9067

Show More Reviews

Ask the Experts about this Hydrastar Brake Actuator

  • Which Hydrastar Actuator Kit Boat Trailer that Weighs 7,000 lbs
    The Hydrastar kit part # HS381-9067 was designed for marine applications like your buddy's boat trailer and since it comes with everything needed aside from brake lines and has the reputation as being the best and most reliable option out there it's one we recommend highly. I attached an install video for this for you to check out as well.
    view full answer...
  • What To Do With Surge Coupler When Switching to Electric Actuator
    The HydraStar Marine Electric Over Hydraulic Actuator part # HS381-9067 is an excellent all inclusive option and what I recommend using. Once you switch over you'll need to lockout your existing coupler or if this cannot be done weld it up or just replace it. Basically, you just need to stop the action, some can be locked out with a bolt but others would require welding or replacing it entirely if you don't have a welder or know someone who can. In regards to brake controllers, these...
    view full answer...
  • Troubleshooting Bleeding Kodiak Disc Brake Assemblies
    I'm glad to hear you have tested the HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness - 1,600 psi # HS381-9067 and found it to be working properly. The Kodiak disc brake calipers like kit # K2R526D have a two piece bleeder valve so if you only adjust the bottom section to attempt bleeding, that is the cause of your frustration. I've attached a couple photos to assist.
    view full answer...
    Image 1 for Image 2 for
  • Parts Needed to Convert Boat Trailer from Surge Disc Brakes to Electric Over Hydraulic Brakes
    What you really only will need is an actuator kit like the HydraStar part # HS381-9067 which comes with the actuator you need and all of the electronics needed to install the kit. You'd just connect the line that runs to your current surge actuator to the back of the Hydrastar and it would tie right in to the system you have now. You can then lock out your surge actuator by welding the two moving sections together or running a bolt through both pieces. Your 2010 Dodge Ram would not...
    view full answer...
  • Parts Needed to Convert Disk Brakes to Electric Over Hydraulic on EZ Loader Boat Trailer
    To convert the surge disk brakes on your 2014 EZ Loader Boat Trailer to electric over hydraulic brakes, you will just need a few things. First you will need an electric brake controller that is compatible with electric over hydraulic brakes. For your 2003 Ford Ranger, I recommend the Tekonsha Prodigy P2 # 90885. This is a proportional brake controller with digital display that will receive the signal from your vehicle's brakes and send it to the trailer's actuator. It will be mounted...
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  • Parts Needed to Convert 2016 Shorelander Trailer to Electric Over Hydraulic Disc
    Can you tell me what axle capacity the trailer has? I don't have the ability to look up trailer component info based on the VIN at this time.
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  • Recommended Surge Brake Conversion to Electric Over Hydraulic System with Disc Brakes
    The best braking system you can have between your vehicle and your boat trailer is an Electric Over Hydraulic system with disc brakes. This will give you the best functional braking as well as the most controlled braking. If you are switching systems it is best to do it all at the same time to have compatible components. If you want to go that route, I've attached an article to give you all the components needed as well as the reasoning. My recommendation is to start with the HydraStar...
    view full answer...
    Image 1 for Image 2 for
  • Electric Over Hydraulic Actuator Setup Recommendation for Converting EZ Loader Boat Trailer
    Yes, the HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness # HS381-9067 is the exact kit you'd want/need to convert you surge disc brakes to electric over hydraulic. This includes everything you'd need and also has the best actuator out there. We prefer it because it has the fastest reaction speed and is the most reliable. The factory brake controller of your 2018 Expedition is perfectly compatible with this as well.
    view full answer...
  • Compatibility of HydraStar EOH System with OEM Brake Controller on 2016 Ram Pickup
    Yes, the HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness # HS381-9067 is compatible with the OEM brake controller on your 2016 Ram pickup. HydraStar has actually confirmed that it is compatible all the way back to 2010 so as long as your boat trailer has disc brakes you are good to go! If you have drum brakes instead you just need the HydraStar kit # HS381-9066 which has a lower psi rating.
    view full answer...
  • Electric Over Hydraulic Disc Kit Recommendation for 2006 Zieman Boat Trailer with Surge Brakes
    What you need first is an electric over hydraulic actuator which will allow you to activate the current hydraulic disk brakes you have. Your current brake assemblies and lines will work fine with this. The kit you need that comes with everything you'd need is the Hydrastar part # HS381-9067. Hydrastar actuators are the favorite here among our installers as they work the best and are the most reliable. You can lock out your surge actuator by running a bolt through the two pieces as that's...
    view full answer...
  • Does the HydraStar Electric Over Hydraulic Actuator Part # HBA16 Need a Separate Battery
    The HydraStar Electric Over Hydraulic Actuator part # HBA16 will receive power from the breakways switches battery. The 12 volt power circuit on the 7-way trailer connector will then be used to charge the breakaway switches battery. I have attached a photo of the electrical schematics of the actuator for you. The HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness part # HS381-9067 comes with a breakaway switch and battery but if you already have a 7-way...
    view full answer...
    Image 1 for
  • How Long Is the Warranty On An Electric Over Hydraulic Actuator for Disc Brakes
    The HydraStar Vented Marine Electric Over Hydraulic Actuator for Disc Brakes part # HS381-8067 which is what comes with the HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness part # HS381-9067 has a two year warranty. This is actually one of the highest warranty periods that is offered for an electric over hydraulic actuator. There are a few other options for disc brakes which I have attached for you below along with the warranty period. Dexter DX Series...
    view full answer...
  • Is the Battery for the Breakaway Kit Included with the HydraStar # HS381-9067
    Yes, a complete breakaway kit, including the battery, is included with the HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness # HS381-9067. I have attached a review video for you to check out as well.
    view full answer...
  • Electric Over Hydraulic Actuator Recommendation for Converting from Surge Brakes
    Locking out your UFP A160 by welding the two pieces is one way to convert to an electric over hydraulic actuator. This way you don't have to replace the coupler. Nothing we offer will fit in that housing but we do have great options. For a kit that includes everything you'd need you'd want the part # HS381-9067. This is the actuator plus all of the wiring needed. The Hydrastar kits like this are our installers favorite as they perform the best and are the most reliable.
    view full answer...
  • Adding Electric Over Hydraulic Brakes to a 3-Axle Boat Trailer
    To switch your boat trailer from hydraulic drum brakes to electric over hydraulic disc brakes there are a few parts you will need. You will need the EOH actuator itself. What I recommend is the Hydrastar Marine Electric Over Hydraulic Actuator with Breakaway and 7-Way RV Harness # HS381-9067. You will not have to replace the brake lines or the coupler. If you can lock out the coupler (keep it from actuating in and out) that would be ideal. You will also need to have a brake controller...
    view full answer...
  • Is HydraStar Marine EOH Actuator Kit Compatible With 2017 Nissan Titan XD Factory Brake Controller
    I reached out to HydraStar, who told me the HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness - 1,600 psi # HS381-9067 will work with the factory brake controller on your 2017 Nissan Titan XD and that you do NOT have to use the HydraStar Electric Over Hydraulic Actuator Adapter Module # HBA-CAM. I have added a link to a video review of this actuator as well as an install for you to check out.
    view full answer...
  • Availability of HydraStar Disc Brake Kit for Drum Brakes
    There is a drum brake version of the part # HS381-9067 that you referenced. For that you would want the part # HS381-9066. The big difference between these kits is the pressure rating. Disc brakes require a higher psi at 1,600 psi whereas the part # HS381-9066 is lower at 1,200 psi.
    view full answer...
  • Recommendation to Convert Surge Brakes To Electric On 2015 Nitro/Tracker Trailer
    To completely convert your trailer from surge to electric, I recommend the HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness - 1,600 psi # HS381-9067 to keep your hydraulic disc brakes which are far better. Then you just need to add a brake controller to your vehicle like # 90195 which works great with the EOH systems. This combination will give you superior braking and the best of both worlds regarding electric and hydraulic systems. If you wish to...
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    Image 1 for
  • How To Convert Vacuum Over Hydraulic Trailer Brakes to Electric Over Hydraulic Trailer Brakes
    In order to convert the vacuum over hydraulic setup on your trailer to electric over hydraulic you will need an electric over hydraulic actuator, breakaway kit, and trailer wiring. The hubs you have now if operated by hydraulic pressure should not need to replaced as well unless they are too badly worn or there is something with a vacuum over hydraulic setup that I am not aware of which is possible as we do not deal with these types of brakes very often if at all. If you do end up needing...
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  • Compatibility of Redarc Tow-Pro and Curt Spectrum Controllers with HydraStar EOH Actuator
    I spoke to my contact at HydraStar who said that the Tow-Pro Elite # 331-EBRH-ACCV2 and the Curt Spectrum # C51170 are compatible with the HydraStar Marine Electric Over Hydraulic Actuator # HS381-9067 that you referenced. If you let me know the year/make/model of your tow vehicle I can see if we have specific installation instructions or an adapter available.
    view full answer...
  • Converting Boat Trailer with Disc Brakes to Electric Over Hydraulic
    Can you feel the brakes dragging when you are towing? It's very common for disc brakes to get hot to the touch from regular use. They create quite a bit of friction which then creates heat. That said you can pretty easily convert the system to an electric over hydraulic setup with the # HS381-9067 which comes with everything you'd need from the actuator to all of the wiring and components. This comes with the best actuator available because it is the fastest reacting and the most reliable.
    view full answer...
  • Hydrastar Electric Over Hydraulic Brake Kit Recommendation with Single Axle Brake Lines
    Since you have a single brake axle your best option would be to go with the HydraStar EOH Kit part # HS381-9067 which includes everything but the brake lines and then from there use the from Demco # DM5424 to supply the single axle line kit.
    view full answer...
  • Can Boat Drum Surge Brakes be Converted to Electric Over Hydraulic Disc Brakes
    We will have all the parts you need, but first in order to pick out the correct kit with hubs that will fit the spindles you have you will need to know what spindles you have. You can do this by getting the bearing numbers off of the bearings of the hub, use calipers to get exact measurements of the spindle, or if you know the brand and capacity of your axles that can be very helpful as well. If you check out the link I attached you will see the entire process of adding electric over...
    view full answer...
  • What Are The Differences Between The HydraStar # HS381-9067 and HS481-8067?
    The HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness # HS381-9067 is designed to work with an aftermarket electric over hydraulic brake controller. This kit will require you to wire in the components using the wire connectors that are included with the kit. I recommend using this kit if your trailer doesn't already have a 7-way trailer connection as you will get the junction box that allows you to wire up the trailer correctly. The HydraStar Vented...
    view full answer...
  • Recommended Electric Over Hydraulic Actuator Compatible With OEM Brake Controller In 2016 GMC Yukon
    We have exactly what you are looking for to convert your surge disc brakes to electric over hydraulic. Starting with the electric over hydraulic actuator I recommend the HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness # HS381-9067 as it comes with the majority of the components needed for the conversion. For the OEM trailer brake controller in your 2016 GMC Yukon to work with the # HS381-9067 you will also need the HydraStar Electric Over Hydraulic...
    view full answer...
  • Brake Actuator That is Compatible With a 2013 Chevrolet Silverado OEM Brake Controller
    For some reason Ford and GM/Chevy OEM brake controllers tend to have a hard time working with brake actuators. Fortunately I have a solution for you from HydraStar. If your boat trailer is not already equipped with a 7-Way you can use the HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness # HS381-9067 along with the Adapter Module # HBA-CAM. The adapter will allow the HydraStar actuator to work with your 2013 Chevrolet Silverado OEM brake controller....
    view full answer...
  • Keeping Breakaway Battery Charged On Trailer Used Only A Few Times Per Year
    To keep the battery of your HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness # HS381-9067 when you are not using the trailer you will need to remove it and use the 12v battery charger you have to keep it charged. You will want to make sure that the charger you have is able to regulate the charge of the battery and will not over charge it. When you are ready to tow you will need to reinstall the battery and the 12v power pin on your 7-way connector will...
    view full answer...
  • Advantage of Electric-Over-Hydraulic Brake Actuator
    The main benefit of an electric-over-hydraulic (EOH) actuator is faster response time than a purely hydraulic setup. Switching from a surge coupler to an EOH actuator will not necessarily increase braking force. You might want to check on the condition of your four existing disc brake assemblies to make sure they are properly adjusted. You can also consider an additional set of disc brakes for the one axle that does not currently have brakes. This is more likely to give you the increased...
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Michael H
Expert Research:
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Jameson C
Employee Adam R
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Adam R
Employee Jeff D
Installed by:
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Employee Randy B
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Video Edited:
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Employee Sarah W
Updated by:
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Written by:
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Test Fit:
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