1973 65hp dies when in gear

[jeannelz64]

Hi everyone, name is Jeanne. I have a 1973 65hp Evinrude that runs fine in the driveway with earmuffs, but the minute she goes in the water she dies. If we can actually get her started while in water, she dies the minute we put her in gear. The carbs were rebuilt a year ago, changed the plugs, fuel pump and all the fuel. Does anyone have any suggestions?
Thanks, Jeanne