Whinning from lower unit

[tdesilet]

I have this Whinning sound coming from my lower unit in the water, I can not hear it out of the water running in my driveway. Does any one know what this may be? I also can hear a knocking sound coming from the lower unit when I am running it in the driveway it is not all the time just ever now and then. PLEASE HELP QUICK!!!!!<br /><br />Thank You

 

[nodumdrivers]

Re: Whinning from lower unit

have you checked the fluid? dirty? contaminated with water? could be a bearing problem or something actually on the engine like a bearing or belt. just my thoughts. goodluck.

 

[tdesilet]

Re: Whinning from lower unit

I drained the fluid and replaced with new fluid, no evidence of metal,dirt, or water. With the boat in the water I opened the engine cover and the sound was not coming from there, but when I went to the back of the boat the whinning (high pitched) got louder.<br /><br />Thank You for the reply

 

[tdesilet]

Re: Whinning from lower unit

Found the problem. Thank You for the help!!!!

 

[Bondo]

Re: Whinning from lower unit

So WHAT Was It..???????

 

[tdesilet]

Re: Whinning from lower unit

The bearings in the upper gear housing got hot and expanded and pushed out the races of the bearings an started to cause it to whinn. Replaced the bearings and now it runs and sounds like a champ. Thank You