I think it would pretty underpowered. The 175's are generally equipped with a 90, with a 115 or 120 being prefered. The 19.6 is bigger and, heavier. While it may be true that you won't always want or need the power, when you gotta have it, like manuevering around a storm, it's priceless. Not to mention, the 75 is going to be worked pretty hard, which is going to eat fuel and reduce the life of the engine. If I had a 19.6, I'd consider going with twin 60's or, 50's. You can crawl if you want or, not. Plus the life on those smaller engines is amazing.