Whinning Noise From Lower Unit

Joined
Jul 27, 2007
Messages
7
Had the boat out this weekend after changing both bellows and putting new prop on, noticed a whinning noise coming from the lower unit only when in gear. I didn't change the gimbal bearing when I had it apart but it felt smooth when I turned it. Wondering if there might be somthing I put together wrong or what else could cause that noise.
 
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