lower unit noise

[Richard57]

knock when power up in forward in lower unit on 99ox66 250,Place in gear no noise then as adding throttle sounds as gears are separating then they catch, No metal in unit oil, Checked linkage adjustment, small amount of play in shift linkage all the way to the right, no threads left to adjust. stomped.

[O2Addict]

Did you ever get an answer as I am having a similar problem?