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Old Oct 13, 2012, 04:10 AM
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United States, MD, Elkton
Joined Oct 2011
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I just checked four of my mixed manufacturer's 4 cycles,and they ALL have a slight "click" on the cam overlap part of the rotation.

It is not a "Knock",just a light click......on mechanical valves,the clearance needed to run properly is always there.

If you have a second engine,see if it makes a comparable sound.
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