Hey guys, I have an 89 evinrude 4hp that runs really well. My question is that when I take my hand off the tiller, it won't just sit and idle. I can litterally just watch the handle turn itself until the engine cuts off. This happens in gear or when I put it in neutral. If I'm running clean water through it in a bucket, I can let it run and it will idle. I bought some sea foam and am going to run that through it but wasn't sure if there is a way to adjust it so it will idle. Thanks in advance, J.T.