The Boston Whaler
Frontier is rated for 300 HP, if my memory serves me. The best power for that boat was twin 150s. I had a friend with a 25' Whaler Outrage (considerably lighter than the
Frontier) and it was very sluggish with four people and fuel with a Evinrude 235 HP. I believe you will be unhappy with less than twin 150s. Having said that, I hear good things about the Suzuki/Evinrude/Johnson 140s 4-stroke. What did it have on it? The gunwales were inclinded to rot also; for some reason they did not use teak.

Welcome aboard!

Boston Whaler, "MUMBLER", 24' Outrage, twin 175 HP Evinrude Ocean Pros.

Snowball, the cat...