Gimbal noise?

[dypcdiver]

Below is a recording of the noise from the rear of the engine. (admin needs to allow MP4 file)
I suspect it might be the gimbal bearing, but would like a confirmation.
Engine is 5.0 Gi PWTR with DP-SM outdrive with 725 hours.
Gimbal Bearing and UJ's greased and new bellows fitted before launch,12 engine hours since launch.

 

[alldodge]

The server has a problem and no one can upload pics/movies. Post on something like you tube and link back here

Does the noise get worse when turning or in gear?

 

[dypcdiver]

Here is a link to the video on youtube:

 

[alldodge]

Remins me of a flywheel rattle. Does noise change when turning, in gear and out of gear?

 

[dypcdiver]

There is no change in the noise in gear or out also doesn't change when turning to Port or Starboard. You may have a point.

 

[dypcdiver]

There is no change in the noise in gear or out also doesn't change when turning to Port or Starboard. You may have a point.

Well, after arranging to remove outboard leg etc. I Ran the motor again and realised that the noise had increased and was from the Circulating pump at the front. Renewed pump and all is well .

 

[ESGWheel]

Locating the source of a noise can be difficult at times. The old trick of a long screwdriver pressed to your ear as you move around the engine can also be dangerous as you are not always observant of spinning pulleys and belts as you turn your head to put your ear on the screwdriver end. While a classic mechanics stethoscope is safer, since sound travels well in metal it can be a little misleading. But now they make these mechanics stethoscopes with an ‘air horn’ to help pinpoint the area that is making the noise. Think of it as a microphone > move it around various areas well out of spinning things to figure out where it’s the loudest and then switch to the ‘rod’ to nail it down. Here is a link to what I am talking about. It’s a good (and cheap) diagnostic tool