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I hit a stump going about 30mph. I was only 1000ft from the ramp so I idled over to the ramp and put my boat back on the trailer and went home. When I got my boat back from getting output shaft and prop replaced my motor now has a bad vibration. My motor always ran as smooth as a Honda or Toyota automobile. When it was idling I could barely tell that it was running. The water coming out of the pee hole was louder than the motor at idle. Did I bed a crank or a rod. The repair shop guy has never seen this. This vibration goes from idle to 3000rpm.