I will be purchasing a 2006 Key West 186 cc, it has a Yamaha F115 on it currently, but for $2600 more the dealer will put on a Yamaha F150 on the boat. The boat will be moored in Wareham Massachusetts by the Maritime end of the Cape Cod Canal (water can ge rough with a strong current at the mouth). I plan to use the boat for fishing and throwing a few traps, along with some easy sight seeing, as well as some tubing and maybe some water skiing at a later date. I will be a first time boat owner and was looking for some advise on what size engine I should go with. I'm trying to do it right the first time. I would appreciate any advise you guys or girls could give me on what I should do. Thanks Tom M.