[Fr. Frank]

If you have a 150, and are running 38 mph, you're doin' okay. The 150 and the 200 are different blocks in most years. You can upgrade a 150 to 175 by changing a few parts and making a few adjustments, but you can't just change the carbs and get 200 hp. I have a 150 xR4 motor that was remanufactured with a variety of parts to make it better, and I was thrilled to get 190 hp. My Seafari 20' will top out at in the high 40's even loaded for fishing.
I have decided my next motor (2 years to go and counting) will require a transom modification like a flotation bracket, and will be a 4-stroke 250 hp Suzuki. I have put my bartered deposit down on a left-over 2006 from a local boat mfg., and will be paying it off over the next 2 years.
It will cost me $8100 including controls.