Load more
This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.
Suzuki's Biggest V6
At Tampa Marine Tuning, we are excited to offer Outboard EFI's performance tune for 6 cylinder Suzuki outboard engines. With this performance upgrade, your 300 and 350 horsepower engine will increase 35-50 horsepower depending on the model.
- DF300B +50hp
- DF350 +35hp
The rev limit also increases by 200-300 RPM to help reach higher top speeds and extract as much performance as possible.
NOTE: To achieve optimal performance, your engine must run on minimum 89-90 USA grade / 95-98 AUS/EUR grade octane fuel and adhere to recommended service intervals. Failure to do so may result in decreased performance and could potentially damage your engine.
** Multi-engine orders: Free overnight return shipping automatically applied at checkout **
Outboard EFI™ Authorized Dealer
Unlock factory-hidden performance from your Suzuki with ECU tunes by Outboard EFI—specialists in safe, calibrated power. Their flash optimizes fuel and ignition for 89+ octane, eases electronic airflow limits, and taps into the shared hardware many models already have, so you feel stronger mid-range punch, better throttle response, and improved efficiency without a full repower.