outboards
I have a Mercury Mariner 5HP and a 8'6" inflatable from Quicksilver. Its a model with wooden floorboards and stern. I had the same influence when purchasing. My teenage son wanted a big outboard. The 5HP with external tank weighs the same as the 4HP with internal tank. So at the time the extra power seemed OK.The 5HP outboard is about all I would want to have to lift up to hang on the rail and I spend three days a week at the gym pumping iron. I have a carrymate handle installed and when I lift it to the rail I tie the outboard to the boat with a safety line in case I slip - don't want the outboard to go in the drink. Actually, I lift it from the dinghy up to the rail and my wife takes it from there. With anything heavier I think you would have to install a lifting davit. Its a lot harder to lift up the outboard from a bouncing dinghy than to pick it up on the showroom floor. How often are you going to use the dinghy and transfer the engine? I see a lot of pretty roughed up inflatables due to being stored outdoors. I store my dinghy below uninflated in its storage case - to prevent UV damage. After 5 years it still looks like new. Likewise I never leave my outboard stored on deck for any extended period, or heaven forbid, on the dinghy. Its just too easy for it to be damaged or stolen. Even in a quiet anchorage if I am aboard and leave the dinghy in the water I still lift off the outboard overnight. So I guess my point is - I lift that outboard a lot.I know I'm a little more fastidious than most - you can easily find my dinghy at the dinghy dock, its the only one locked to a dock cleat with a steel cable. But look around, I think most people tire real quick of hauling an outboard around because they buy one that's really too big.As far as performance the above combination will plane with one adult or two light kids aboard. What more do you need?Epilogue:My son used the dinghy about four times in the last five years. As a teenager he had better things to do than hang around with dad. Right now I would be interested in exchanging my inflatable dinghy and outboard for a hard dinghy that can take some abuse and be left out in the weather and a real small gas or even electric motor. The dog comes out with me more than my kids now and I'm always concerned about the dog holing the inflatable.