Description
KE Controls by NHK MEC
U.S. Sales & Support — Seatech Marine Products
KE503A Second-Station Kit — Single-Engine — Chrome, Stainless-Steel Lever
KE5+ · electronic shift and electronic throttle
Obsolete: Please see KE5XG KE513A
The NHK MEC KE503A adds a second helm station to a compatible single-engine KE5+ engine-control installation. It supplies the station components listed below; the base system provides the control unit.
- Product type: second-station kit
- Engine configuration: one engine; electronic shift and electronic throttle
- Lever style: stainless-steel; chrome control head
- Order separately: A bus harness selected for the added station route
Not sure which KE system fits your boat? Get help from our team.
Planning a replacement or upgrade?
Use the replacement link and the applicable manuals to compare the current system with the installed equipment. Matching engine count alone does not establish that control heads, control units or harnesses interchange between generations.
Included in the KE503A station kit
- 1 × NM1003-00 — Single-Engine KE+ Control Head - Chrome - Stainless-Steel Lever
- 1 × NM0647-10 — KE+ T-Harness (R/C)
- 1 × control-head buzzer: NJ0251-00 for 12 V or NJ0515-00 for 24 V
Required separately and installation planning
- NM0649 bus harness — select the section length for the added station. Confirm each route length against the applicable wiring diagram. Bus, power and engine-interface harnesses have different roles.
- KE503 — a compatible KE5+ base installation must already be present or supplied separately. The station kit does not include another control unit.
- Configure the system using the control-unit settings described in the applicable legacy manual. Do not apply KE-XG programming instructions to a different generation.
Request complete system pricing to include the required harnesses, cables and other installation parts.
Station expansion and setup options
KE5+ supports up to four helm control heads plus one optional wired handheld station with the appropriate components.
- NM0907-00 — optional wired single-engine handheld remote; match the socket harness and system generation.
Dimensions and reference images

Downloads and Resources
KE5+ Installation and Operation Manual
Use the manual for the exact system or component being installed.
Download PDF »KE503A product questions
Is KE503A a complete standalone control system?
No. KE503A adds the second helm to a compatible single-engine KE5+ base installation. The base control unit is supplied separately.
Which base installation does KE503A need?
Use the compatible KE5+ single-engine base installation identified for KE503. Match the station number and wiring layout before ordering.
Is the bus harness included with KE503A?
No. Select the bus-harness length and layout for the added operating position separately.
Base-system reference specifications
These figures describe the connected base system. The control unit is not included in this additional-station kit.
- Supply voltage: 9-31 V DC
- Shift output: Coupled to the supply voltage; forward, reverse and neutral connections; 9 A maximum
- Throttle current output: 4-20 mA
- Throttle voltage output: 0.2-4.5 V
- Throttle PWM output: 6-94% duty cycle at 500 Hz
- Throttle CAN output: SAE J1939
- Idle-validation switch: Normally closed / normally open; 24 V, 2 A maximum
Why choose Seatech for KE Controls?
Get help matching the system to your engine and gearbox, planning the harnesses and cables, and finding replacement parts.
Request a system quote or contact Seatech Marine Products for parts selection and shipping information.
Related parts and support
- NHK MEC KE513A KE5XG Add a (2nd) Station Kit - Single Engine Control Head - Chrome w/ Stainless Lever
- NM0649-xx
- How to Purchase a Complete KE5+ Single Engine System
- How to Determine Which KE+ Series is Right for your Boat
- Contact Seatech Marine Products
- Ask about stock availability
Store information
- No Sales Tax on Purchases Outside of California
- FREE Ground Shipping to the Contiguous 48 States
- Buy Now Pay Later with Affirm or PayPal Pay Later
Additional Information
Return Policy for NHK MEC Parts & Systems: |
All sales of NHK MEC components are final, with no returns, refunds, or exchanges accepted. Each component is rigorously inspected for quality before shipping. It is the customer's responsibility to verify compatibility prior to purchase. |