I was losing pressure over the years with my OE pump. This fit right on with little effort. Took about an hour to remove the old pump and about 10 minutes to install this one. NOTE: My engine is only 9 HP, I had to turn the pressure valve down significantly in order for my engine from bogging heavily under load. However, I am getting enough pressure to reach my (over) 25 ft roof. I'm sure it will work even better for the 14hp engines it was intended for.