I have a 1988 17 foot bowrider with a 120 HP OMC stern drive that weighs about 1800 pounds dry weight. Anyways, when it was new, they gave us a 5HP Force for pretty cheap. I dont remember exactly what went wrong with that, but about 5 years ago or so it stopped running and wasnt worth it to fix. There was probably less than 20 hours total on that thing but I am sure since it was hardly ever used, my dad didn't even think of the need to maintain it. I do recall it being sufficient for trolling.<br /><br />So anyways, I have been looking to get a new one now because the electric I have been using for trolling is great, but only lasts a few hours, and when it isnt windy. I think I am set on getting a 4HP 4 stroke Yamaha with the long shaft. My bracket goes down to where there is about 13 inches from the top of the bracket to the water line, so I figure the longer shaft will be best. I like the fact that the motor has the internal tank as well as the adapter for an external tank. I just want your guys opinion to make sure I am getting the right motor for trolling or to get back to shore if my main one fails (which I have almost needed a few times!). I am almost always in fresh water (occasionally go in the salt) and actually don't go trolling that much. I just want to have it to know I can get back if my main breaks down and I am several miles up lake somewhere. Only negative thing I have heard about one cylindes is that they vibrate, but is it really going to be that much of a problem? Others have said this is a very quiet motor. I mean I am sure it is a lot quieter than that old Force we had, and I dont remember that being too loud. A place is getting in some 2005's in a couple weeks for $995 and that is the best deal I have found. I thought about the 6 HP 2 cylinder, but I didnt really want to spend $1600. Ok sorry this is so long, but I would appreciate any opinions you have. Thank you.