Howling lower unit/outdrive

[Allie B.]

Just replaced the lower unit in a merc 260 with a brand new one! Why would it be making a howling noise? Runs great otherwise just looking for some opinions

 

[jigngrub]

Re: Howling lower unit/outdrive

Are you following the break-in instructions?

 

[oops!]

Re: Howling lower unit/outdrive

have you checked the oil?......do you know the condition of the gymbal bearing?