Does This Sound Right? Bravo Install

Kola16

Kola16

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Jun 23, 2019
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I replaced my old MC-1 drive with a used Bravo drive assembly. I installed a new gimbal bearing, U-joints, and drive oil in the new drive assembly. Did the alignment, which maybe that could have been better, but I could pull the bar out with 2 fingers (barely?) and spin the bar without any grinding.

Does this sound normal? Sounds clunky to me. Roughly 900 RPMs.
 
Fun Times

Fun Times

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Staff member
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May 16, 2009
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9,308
No, doesn't sound right... maybe try pulling the drive off and see if the noise goes away/changes....But be sure to add water to the intake water hose location at the gimbal bell housing before starting the engine...The idea,

Also try using something like a broom handle, stick, etc. to place around the engine and drive areas to help listen for a more definite sound location.
 
Scott06

Scott06

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agreed run it with the drive off. did you replace the gimbal and Ujoints ? if ti sat they may be bad. Ujoints are tough to check out via feel. I have had joints feel great, and when you replace them be beat up. Might pop the top on the drive.

my boat sat for years before I bought it (11ys old with 37 hrs...) when i tore down the drive for a reaseal there was corrosion on the top bearing in the drive that is above the lube level. never saw any signs there was a bad bearing , just when I snagged fishing line on the props shaft I resealed the whole drive...
 
Lou C

Lou C

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Agree with those above, does not sound right, run it with the drive off. Does it change when you tilt up or down, or steer left or right? Might be a clue if it's ujoints vs gimble bearing.
I have a mechanic's stethoscope and it is great for finding noise sources.
 
Kola16

Kola16

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I did replace the U-joints and gimbal bearing. I also popped the top cap off of the drive. Everything looked fine, but it was hard to see everything in there. I will run it with the drive off once I can, but I just noticed a leaky riser so I have to address that first now :poop:
 
Scott06

Scott06

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Kola16 said:
I did replace the U-joints and gimbal bearing. I also popped the top cap off of the drive. Everything looked fine, but it was hard to see everything in there. I will run it with the drive off once I can, but I just noticed a leaky riser so I have to address that first now :poop:
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Could be the gimbal bearing is not fully seated
 
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