Hi I am selling this clean 2004 mercury F25 carbureted 4 stroke powerhead this was removed from a running motor compression was good on both cylinders 205 psi and motor sounded good when we started it before tear down comes exactly as shown in the pictures this will fit Yamaha 25 4 stroke and maybe other motors computer and carb and flywheel have been removed everything else is there please feel free to ask any and all questions and I will be do my best to answer them for you thank you.