![]() Any significant HP gains would require major mods.Īlso, if talking older carbed motors even if you saw the 2 engines at the same displacement, bumping the detuned version up to max would also likely be more labor intensive. If however in comparing the 2 engine's specs you find the the 90hp is a significantly larger displacement, and the 70/75hp is the highest HP rating for its displacement then no, it's usually not possible. If the cc/Cubic inch displacement is exactly the same, then it's actually the same engine and tuning back up to maximum output is possible. The Yamaha F70 is a hyped up 60 HP motor. Given that most 4-stroke motors are able to make 1-HP-per-cubic-inch-of-displacement, the old DF 60 was basically a detuned 80 HP outboard. Reading of technical parameters in real-time. Reading sensors and actuators in real time. To see if it is in fact a detuned version, pick a brand of 70/75hp outboard and compare the specs to the 90hp version of the same brand. It's a BIGGER motor than the 1-L Yamaha F70 in two ways - weight and displacement. Using this Diagnostic Kit with the Yamaha Diagnostics Software Program, you can make many tests and analyses, such as: Reading and resetting the fault code (s). If the 70/75hp of a particular engine happens to be an EFI and a detuned version of a 90hp,it has been done by removing the restrictor plate and either re-flashing or replacing the ECU, and re-propping. Simple question I guess, are there any 70 or 75 horse rated 4 stroke OB's that can be easily chipped or modified to 90 HP?ĭepends on the brand /year/model. Your F70 AET is starving for explosive horsepower We sell top of the line Yamaha Fuel Tune ECU Chips.
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