NoMechanic
New member
I purchased a used NSF4A2 4hp 4-stroke. I tried to run it yesterday, and did not get any water flow out the port located above water at the back/bottom of the motor. When I checked it, it looked like the small hole was plugged with a white powdery corrosion. I used a wire to try to clear it, but only got about 1/8 inch in. I also tried to unscrew it, but it did not turn. Any advice is appreciated.