![]() ![]() Please note that all NIZPRO ECU Flashing Software is ONLY compatible with Windows Computers. *Performance Caveat : Engine must run on Minimum 89–90 USA grade / 95-98 AUS grade Octane fuel & have adhered to recommended Yamaha service intervals. I won't do an aftermarket flash to my ECU as I'm not looking for that large of an increase. These tests underpin the performance of the thousands of engines currently in market using the Nizpro Marine 332HO Performance Repower At Tampa Marine Tuning, we are excited to offer Nizpros performance tune for 6 Cylinder Yamaha outboard SHO engines. Will an 250 SHO ECU function properly on my engine From what limited knowledge I have, it is my understanding it will work. The same engine has also been extensively water tested for 250+ hours to further validate the dyno results. The engine passed with no adverse effects*. ![]() Testing: We have rigorously tested the Nizpro Marine 332HO Performance Repower on a standard Yamaha 250hp SHO engine utilizing the Nizpro Marine Endurance Test on our inhouse dyno cell. Increased Power, Improved Economy & Reliability? It’s all true! It out performs the same 2 stroke motor in all respects. It is very fast compared to my previous 250 HPDI VMAX in all respects on the same hull with the same prop. My question is will it hurt the longevity of my engine and create problems. Zero issues other than some corrosion on a few components around the steering tube and tilt tube. Use the DIY Kit to easily flash your ECU! Upgrading to a Nizpro Marine Performance Repower, your Yamaha 250hp SHO will make 332hp with extra torque through the rev range to get your boat up and out of the water faster. I have a 2017 250 SHO on my boat and I am considering having it flashed to a 300. Safely increase the fuel efficiency and horsepower of your Yamaha outboard motor by up to 130hp with a Nizpro ECU tune or flash from Tampa Marine Tuning. It’s not about turning your boat into a rocket ship – that’s what we made Nizpro 450s Superchargers for! Do it yourself ECU flash kits are available so you can flash your own Yamaha outboard ECU to our proven custom calibration’s. ![]() High Performance Upgrade for Yamaha VF250 SHO. A Nizpro Performance Repower is about optimising the performance of your engine. NIZPRO ECU Reflashing will refine your Yamaha VF250 SHO for higher hp, more torque, lower cruising rpm and improved fuel economy. ![]()
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