At Celtic Tuning, we offer specialized ECU remapping and chip tuning services for Mercury marine diesel engines. Our goal is to improve performance for both leisure and commercial use. Our experienced team writes all the software in-house, ensuring reliable upgrades that provide lasting results at sea.

Our Mercury diesel remaps deliver stronger torque, better throttle response, and smoother power delivery. This makes vessels more responsive and easier to handle. Many operators also see improved fuel efficiency, which helps cut operating costs and extend the range on every trip.

Whether for private leisure craft or commercial marine operations, our ECU software enhances the balance of performance, efficiency, and reliability. This gives you confidence and control in all conditions.

We develop all software to high standards, ensuring consistency, durability, and dependable performance where it counts the most.

For added peace of mind, Celtic Tuning offers a mechanical breakdown warranty and a 14-day money-back guarantee.