I'm buying a Polar 19 ft DV Center Console and am certain I will putting 4 stroke power on it. The boat is rated for 150 hp max and I have entertined the thoughts of going for the gusto with Yamaha's new 150hp four stroke. The standard package is with a Yamaha 115 four stroke which the dealer assures me is adequate. I will be using the boat for great lakes fishing and pulling the kids around on a tube. I thought of more ponies because the kids are small and light now, but as they grow and perhaps bring a friend along, weight will be a greater issue. However, the 115 will be about 60lbs less than the 150 which will be a plus. The 150hp upgrade will be about $2,500. Test data with the 115 shows the boat cruising WOT in excess of 40 MPH which I would be satisfied with. I would expect better with the 150 but thinking it may be overkill for most situations.<br />Other than power and money....What do I have to gain & what do I have to loose.<br /><br />Helpful advice appreciated<br />Kevin