Motor vibration......question

[stagger_lee]

Does it change if you trim the motor up or down.

Never tried that, I dont think !......I will give it a go next time I'am out and about......Thanks

[lineside]

Does it change if you trim the motor up or down.

[stagger_lee]

I have a 25 horse Mercury bigfoot on a 14 ft crestliner. I usually troll with a bow mounted MinnKota, but when I do use the Merc with the trolling plate down , I get a good vibration throughout the boat....like when the pole is in the holder it shakes like crazy......could it be the trolling plate or ??? anybody got any ideas ?