I have been pondering the notion of re-powering my boat for a minute. The '96 Suzuki DT150S BASS is just not performing like it should. I keep having issues I am trying to iron out and keep dumping money on little things here and there that are nickle and dime'n me left and right. So out of curiosity I started looking at the Mercury Pro XS 150 today online. For roughly $12-$13+k I could re-power with a 4 banger 4 Stroke that is probably a lot lighter than the 2.7L pig I currently have. If when re-powering is it always best to go with a new power plant if money or financing is available and is 4 stroke engines every bit as good or better than 2 cycle engines these days?
Then that also got me to thinking. I know the sticker on my boat says not to have more than 5 passengers and not to exceed the 500+ lbs rating as well as not to power the boat with a motor rated for more than 150 HP. Is the power plant in a boat a coast guard and legality concern or is it more for hull integrity and or insurance purposes?