Vibration

[dgm43]

We were trolling today on one engine in our twin engine boat with two large sea anchors deployed.  There was a two knot current and wind.  When we trolled into the current and wind we had to run our engine at 1200 rpm or more which caused a lot of vibration.  If we removed the sea anchors to reduce the load the vibration went away and there is no vibration at high speed.  Any ideas on what might cause this?Don

 

[Tall Tails]

1200 is way to high to troll and there is no need for bags. Get your carbs tuned to idial at 600 when in gear. To many mechanics will tune at the dock. A baha trolls at 600 to 850. I use one bag occasionally. And 2 bags only brown trout fishing. Feel free to pm me I have run a Baha for awhile now.

[dgm43]

Thankyou for your reponse.  I tried to message but I guess I do not know how.  Do you have an auto pilot?  If so, what brand and what kind of steering?