Bayer Marine recommended an Evinrude product (I can't remember the name) to add in every tank of fuel. My engine was heavily carboned up when the piston failed. I'm going to be needing to doo something different when the rebuild is complete. I had two weeks left on the warranty!!
Hybrid/Striper Guide Skiatook Lake Fishing Guides
Lowrance Pro Staff, Zebco Brands Pro Staff,
Yeti Pro Staff, Costa Del Mar Pro Staff, Mercury/Motor Guide Pro Team.