Re: rough running at high engine speeds

Posted by HH56 On 2017/10/22 11:16:28

It might be worth a quick test without an air cleaner to see if that would have anything to do with the problem.

I have never paid attention to what is in the chamber or silencer behind the filter element but more than one of the old Gus stories had a theme of some kind of baffle or silencing material in air cleaners loosen. When whatever item was free to move and the engine was needing to pull a lot of air at higher speed the item could shift and partially block airflow with results similar to what you describe.