Bubbakat, my boat is rated for up to a 90 HP motor according to the data plate. Currently I have a 50 HP Johnson on it which purrs like a contented tom cat. However, I have the opportunity to purchase a 70 HP Johnson for $300.00... Thanks to all your advice, I know what to look at on this motor... the question is, how much additional weight would I put on the boat by purchasing the 70HP. I cannot find any reference to a motor's weights in any of my manuals or via searching the web. If the data plate says a 90 is okay, would it be bad to go with a 70? Thanks Willard.