NEVER run and I/O (inboard/outboard) {outdrive equipted} boat with the drive tilted all the way up!!!! running it for 3 minutes can do some damage to the drivetrain.
I got my money bet on bad/worn out u-joints. the u-joints are constantly spinning because they are directly connected to the rear of the engine via engine coupler. when the engine runs, the u-joints spin due to the flywheel spinning (where the engine coupler is bolted to).
you say the the outdrive is making vibration noises when tilted and when making turns. that is due to the u-joints are being flexed and binding when making turns or tilting/trimming the drive. your best bet to have the problem fixed is to take the boat to a marina/boat service person to have the u-joints replaced. also when it is being fixed get the gimbal bearing greased along with the transom, and have the engine alignment checked.
im not sure where you are located so i cant recommend a service location near you.
hope that helps, jst_4_kiks
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