only if you need your boat to pull another boat just like it (with a 4 stroke) underwater.
Reminds me of the plastic boats ads showing how you can beat the crap out of them with a hammer and they just pop back - great for every time your attacked by hammers, but means little outside that.
Show me same boat, same weight, same type of motor (HDPI, not 4 stroke) and give some fuel burn numbers. Thats info I could use.