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Parts Needed To Convert Boat Trailer For Electric over Hydraulic Disc Braking  

Updated 12/15/2025 | Published 11/16/2024

Question:

Hello I am looking for electric over surge trailer brake conversion. The boat is a 252s Yamaha jet boat approximately 5000lb. The trailer has disc surge brakes. Towing with a 2010 Toyota FJ Cruiser. Can you give me the info about a complete kit and wiring for the FJ Cruiser Thank you

1

Helpful Expert Reply:

The Hydrastar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness # HS381-9067 will provide you with the actuator for the trailer along with the breakaway system and trailer connector. If you can send me some images and information about the trailer coupler you have I can help you find a suitable replacement.

You will need a suitable brake controller like the Tekonsha # 90195 with the hydraulic actuator. The Wiring Kit # ETBC7 will provide you with the wiring needed to connect to a 4-way and wire in the brake controller.

expert reply by:
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Bud M
Bud M. profile picture

Bud M.

12/15/2025

Hey, how did things go with the Hydrastar actuator and wiring kit for your FJ Cruiser and boat trailer? Were you able to match a coupler that worked with your setup? Your update could make it easier for the next person doing a similar conversion.

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