just bough a 25 hp evinrude that hasnt been started in 6 years

[Earnhardtfaniam]

The engine was winterized and fogged. It started and ran ok but after a cople minutes it starts running rough, it idles ok but once you get going it starts bogging then when you back of throttle it smoothes out then dies? Any ideas? I put new gas tank, new plugs and its getting plenty of gas.

[Elton Smith]

What year model is it?