On top of that, they are quite a bit less expensive. They can make 200+ HP fairly easily as well. Those engines are a lighter than the V6s, they are reliable platforms, and enough torque to get most sub 22’ boats moving really well. With clean toons, top down medium load and good prop, I was only getting 32-33 MPH. I have a 200 SHO on a HEAVY R25 with ESP. Anyway, I am here to testify in no uncertain terms that it works and the results are just unbelievable. To me, the best engines to tune for light boats would be the mid range 4 cylinder outboards like the 3.0 Mercury four stroke, and the 2.8 Yamaha Vmax SHO (150-175). You have as much chance of blowing the power head on your 200 SHO with the remapped ECU as the guy who BOUGHT the F300. But, the results can be promising.Ĭompanies like Simon Performance Technology, Hydro Tec Marine, and a couple others are making products that address many performance needs from ECU programming, solid mounts and even beefed up propshafts in the case of Yamaha outboards. Head work can get expensive, same with exhaust and intake because nobody is making parts en masse. If you can get more air in, more air out, and have the ECU dial in the performance, you have the ability to really change an outboard. But, the advantage four strokes have is that they are fairly simple to tune. Use the DIY Kit to easily flash your ECU Upgrading to a Nizpro ECU Flash, your Yamaha 200hp SHO will make 332hp and rev to 6,400rpm and with extra torque through the rev range to get your boat up and out of the water faster. When direct injection technology took over the two stroke market, it created a challenge for modifying those engines, compared to the old EFI engines.
![yamaha 200 sho ecu flash yamaha 200 sho ecu flash](https://usermanual.wiki/Yamaha/2011VmaxOwnersManual.438054412/asset-1a.png)
![yamaha 200 sho ecu flash yamaha 200 sho ecu flash](https://www.nizpromarine.com/wp-content/uploads/2020/05/DIY-KIT-Box.jpg)
But where do the new four strokes leave those looking to tweak their setup? In a good place in my opinion. With gains to torque throughout the rev range to help get your boat up and out of the water. Once your ECU has been re-flashed with the Nizpro Marine calibration your Yamaha 200 SHO will now be making 332HP and able to rev to 6400rpm. Don’t get me wrong, it’s not the glory days, but there are some powerful, incredibly reliable engines on the market. Flash results below:-STOCK YAMAHA 200 VMax SHO VS NIZPRO ECU RE-FLASH.
![yamaha 200 sho ecu flash yamaha 200 sho ecu flash](https://texasfishingforum.com/forums/pics/usergals/2018/08/full-26361-228991-fb_img_1534262868338.jpg)
It took about 10 years for the weight and cost to come down, and now we have some decent options with attractive warranties. Flash results below:-STOCK YAMAHA 200 VMax SHO VS NIZPRO ECU RE-FLASH. At first, four strokes seemed like the enemy of high performance boaters they were heavy, lacked the low end torque, and were geared to push houseboats, not light performance hulls. yamaha f115 ecu flash Great for deck, inshore fishing, bass, aluminum console. While outboard engines have changed a great deal in the last 10 years, the biggest changes have come in the last three years, including the monumental shift at Mercury Outboards in the spring of 2018.