I replaced my Honwave 3.5 + 15 mariner with a Zapcat with a 30hp Tohatsu 4 stroke. Easier to launch, much smoother, faster (38knots) and more fun. Also the Tohatsu is much easier to start than the Mariner. Although the Zapcat is a racing boat it makes a great family boat especially with the Tohatsu 30hp fourstroke.
If you are interested I might consider selling due to lack of use.