You sure the engine is healthy and in good tune? Fuel injection has nothing to do with how the engine will pull. The engine doesn't care how it gets the fuel/air mix, only that it is right for the conditions. Personally I avoid fuel injection. It's expensive and difficult/time consuming to fix compared to carbs which generally just work.
I don't know for certain, but I wouldn't think in such a small light boat that prop would be that bad. Check your initial timing and that it is advancing fully and smoothly. Initial should be around 8*-14*, more is better if it will do so without detonating. Total timing should be around 38* at 3000 RPM. Ensure the secondaries on your carb are opening and not opening late. If it's an older carb check for blown power valve. Too much fuel with create a rich bog condition. Aside from that, good strong spark, clean cap+rotor, etc. Just make sure it's running right before throwing props at it. What is your WOT MPH and RPM? Should be in the 4400-5000 RPM range as a general ballpark.