Vibration In bravo 3

[Baby Blue]

1998 2800 scr 7.4 l bravo 3

Just started the 2nd season with our boat. No issues at all last season
Over the winter I installed a prop anode and misc maintainence. I did not pull the drive though.

This season I have a slight vibration when coming up on plane. Not even sure if it's a concern or not.
The only thing I did over winter was install a prop anode which it didn't have before. I did index the probs with front blade at 12:00 and back blade at 6:00
I know there are many things that can cause this but looking for any advice or tips on searching it out.
When I bought the boat last season I was told the bellows and gimbal bearing where changed out on 2012.
Thanks. BB

[mmwjr]

Vibration is not good as it may cause the prop shaft to wobble and wear the seal.

I would start with the two things you changed.

Remove the anode and see what happens, if no change return props to how they were before.

[Baby Blue]

The prop anode requires a new special prop nut that didnt have a nylon locking washer built into it. Possibly just a loose prob nut. Going to check all of those other things and unfortunately I have to pay to have to lifted out. Certainly don't want to risk and damage so has to be done.
Thanks.
BB

[Baby Blue]

I was able to trim the drive all the way up in trailer mode and access the props without pulling the boat.
Boths props hit 12:00 position at the same time. I indexed them and vibration. Is gone. Surprised bravo 3 manual makes no mention if this.
Bb

[mmwjr]

Glad you were able to resolve it without much work or time.

[Baby Blue]

yes... me too, that's usually not the case with boats!.. thanks for the tips.
BB

[shrew]

Merc actually mentions 'indexing' the Bravo III. Though they will always coincide at some point. Now, don't they coincide at 2, or 3 instead of 12? Is there really a difference?