I have an Evenrude 35. I know its not a 300 but it's still been a sweet motor. We call it old reliable because it's got 1500 hours on it and still works great. It's pushing my 28 Eliminator quite nicely. So far I have done 6 MPH on GPS but my Butt O Meter is thinking its done about 7.5 in good water and nice weather.