FuelTech’s FT550 & FT600 to Replace OEM ECU Sea-Doo 325 RXP-X & RXTX


With innovation comes new challenges to hurdle. The introduction of the 325 ACE engine provided the performance community a new powerplant that has thus far, surpassed so many tuners’ expectations but with it came how to circumvent the almost impenetrable BOSCH ECU software.

Many now are resigned to physically cracking open the ECU housing and de-pinning the current processor and soldering in an older processor – one that is more easily reprogrammed. This physical replacement of the processor obliterates any hope of reversal or retaining any semblance of the factory warranty.

Rather, FuelTech offers a far more beneficial option: upgrading your Sea-Doo 325 with their FT550 or FT600 aftermarket ECUs. With the latest update to its software and the use of FuelTech’s FT550 2024 Sea-Doo 325 PWC PNP Harness, any tuner can safely and cleanly install a new ECU that retains full CAN communication with the OEM dashboard and Sea-Doo’s intelligent brake and reverse (iBR) system.

The list of added benefits is extensive, so much so that we’ve included the entire press release from FuelTech in its entirety below:
The updated FTManager software allows the OEM ECU on the Can-Am Maverick X3 UTV to be replaced with either the FT550 or FT600 aftermarket ECU. The v 5.2 update provides CAN communication capabilities with both the dashboard and the electric steering assist and includes protocols for 2016-2020 models and 2021-2024 models. The available FT600 plug and play harness adapter makes upgrading your Can-Am Maverick X3 to a FuelTech ECU easier than ever! Wiring Harness Adapters for 2021-2024 Maverick X3 and 2016-2020 Maverick X3 on our website.

The FTManager version 5.2 update also allows the Sea-Doo 325’s OEM ECU to be fully replaced with the FT550 or FT600. The update provides OEM CAN communication with the dashboard and Sea-Doo’s intelligent brake and reverse (iBR) system. The FT550 and FT600 are IP67 rated against water and fine dust particle intrusion, perfect for taking on tough trails or heading for open water. To make upgrading to the FT550 easier, the FT550 2024 Sea-Doo 325 PWC PNP Harness provides plug and play installation by utilizing the OEM wiring harness.

To download FTManager v 5.2, visit the FuelTech’s Software page. As always, our software is completely free and features are never hidden behind a paywall. Want to master tuning your FuelTech build? Learn more about our FT Education courses. Additionally v 5.2 features, changes and additions to existing features, and general software/feature corrections are listed below.

Electronic BlowOff Control by TPS variation (delta TPS) so it can be actuated on idle, 2-step, and/or 3-step to further aid in spooling the turbo.

Water Methanol Injection (WMI)
– Control by MAP, air temperature, exhaust temperature (EGT), and time after validated launch.
– Safety conditions by engine, air, and exhaust gas temperatures, water tank level, and more.
– Fuel and timing compensations by WMI

VW/Audi CAN Communication – Option to send engine RPM to OEM dashboard via CAN.

Jet Ski and UTV Timed main relay allows for a timer or optional input “Engine Off”

Blip, Heel and Toe New Activation Methods
– GCM – Gear control management
– Downshifts through the Automatic Transmission Control Feature
– Brake + clutch switches for downshift
– Clutch while upshifting with TPS above 0% – momentarily closes the throttle even with the throttle wide open
New Tables
– Electronic throttle opening on downshifts (by gear x RPM)
– Electronic throttle closing on upshifts (by gear x TPS)
– Output for blipping with mechanical throttle (ON/OFF) allows use of an actuator to pull the throttle cable for downshifts

Added Compensation by Differential Fuel Pressure
– Corrects injector duty cycle automatically, helping to reduce O2 closed loop compensation.
– Bank selection option to apply the compensation.

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Kevin Shaw

Editor-in-Chief – kevin.shaw@shawgroupmedia.com Kevin Shaw is a decade-long powersports and automotive journalist whose love for things that go too fast has led him to launching The Watercraft Journal. Almost always found with stained hands and dirt under his fingernails, Kevin has an eye for the technical while keeping a eye out for beautiful photography and a great story.

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