[FONT=Verdana, Helvetica, sans-serif]Our 150 Johnson has developed an internal knocking noise. It can be heard faintly at idle. It can be heard well if you put your ear on top of the flywheel cover and you can feel it when touching the fly wheel cover. If you rev it up a bit in neutral it is much more noticeable and sounds horrible. When under power it goes away when under load, when accelerating from a stop but comes back once on plane. I would definitely guess it is something in the lower end. I had an outboard guy (recommended by my marina) look at it and he tells me its ok and running it like it is will be fine and won't cause any more damage. I am not very confident in his diagnosis and would like a second opinion for peace of mind.[/FONT]
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