[willy]

all right here is the skinny so far, went down to the yard and started inspecting for obvious things, nada, then I realized something was not right and it hit me I was missing my little fin above the prop, it fell off apparently and when I checked the bolt rattles around loose inside. Ran down and picked up a new zinc and installed. Launched boat but noise is still there.
Had boat pulled and went thru every nut bolt on it and all looked tight and clean.
Had the engine cover off and I notice that the cowling has three heavy duty formed in stems that contact three corresponding metal tabs on the lower half. Two of the three have heavy rubber blocks on them, fit like a nipple over the tit.
One missing and not to be found, this would definetly make a vibration from the looks of it and would fit with it coming on under heavy vibration and acceleration and fading away once you level off.
It would also fit with the fact that at the dock me running the engine up high rpm and no noise, I had the cover laying in the cockpit!!
So going back down tommorow after a stop to a yammie shop for the rubber part, they were closed when I found it this afternoon.
Saying a little prayer this is it because there is no where else external to look and at a 120/hr I sure as heck cannot afford to have someone diagnose it.