The thing is when most people complain about the Intek or the Courage they are talking about the single and not the twin. And most people don't make the distinction between the single and twin cylinder versions of the Intek or Courage. And when people talk about the issues, it makes it sound like it is a widespread problem with the engine. Everybody talks about the Courage crack, but in reality that only effected less than a thousand engines out of a million. And Kohler stood behind the issues by extending the warranty way past the expiration date.
the updated version of the Courage single is the 5400 series, and the updated version of the Courage twin is the 7000 series. The internals of the 5400 series have been changed and beefed up even though it still uses the bucket style block.