Normally the cowl is the culprit in most of the noises.
Ain't but a couple of other things that wouldn't show up easily.
Check the starter bolts, air damper and carb bolts or nuts.
Also look toward the bottom of the motor around the powerhead and even with a magnet for the spots you can't see for a hidden dropped bolt or nut.
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'75 Cuddy with '00 Johnson Ocean Pro 150 horse
Benny
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