1986 merccruiser weird noise

[acebailey]

Hi all, had the boat in the water for first time this year. Had it running off muffs before taking it out on the water and it ran fine. When I put it in the water I instantly noticed this noise. Just need some ideas of what it is. Gimbal bearing ?

 

[alldodge]

Sound isn't clear enough for me. If its a growling it may be the bearing.
Was the trim up high or all the way down?

 

[acebailey]

Trim was down.

 

[alldodge]

If sound changes as wheel is turned, the may be U joints. If it changes as rpm's increase then maybe bearing.

Also check lube to see if lube remains clean

 

[dubs283]

when was the last time you pulled the drive?

 

[acebailey]

I received this boat from my elderly parents. It had been sitting for many years in a covered garage. Before being stored I was told that new bellows, gimble bearing were replace, as well as water pump and impeller.

 

[alldodge]

when was the last time you pulled the drive?

I received this boat from my elderly parents. It had been sitting for many years in a covered garage. Before being stored I was told that new bellows, gimble bearing were replace, as well as water pump and impeller.

You nailed it dubs
Been sitting for several years
Pull the drive, inspect the bellows, bearing and U joints. Replace the impeller and or pump housing. Replace gear lube

 

[acebailey]

What did you think about the noise?