Go Back   Maxum Boat Owners Club - Forum > Maxum General > Engines
Click Here to Login
Register FAQ Community Calendar Today's Posts Log in

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-09-2018, 03:23 AM   #1
Ensign
 
Joeh's Avatar
 
Join Date: Jun 2017
Posts: 5
Default Bravo 2 noise

HELP
I have a 3000 scr with bravo 2's the port side when in idle there is a low bearing noise coming from it. I can hear from on the boat and outside.
When I removed the upper unit fluid cap there was a lot of metallics in the fluid. The lower unit had none.
Also my gimbal bearing was installed last year at the end of the season.

Does this sound sound like the upper unit bearings?

Sent from my SM-G955U using Tapatalk
__________________

Joeh is offline   Reply With Quote
Old 05-09-2018, 03:45 AM   #2
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,606
Default

The upper unit has gears as well as the cone clutch, if the vent plug has a magnet and there are metallic filings on it something is failing. Does the boat still shift into forward and reverse? Does the sound change when doing so?
__________________

__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 05-09-2018, 04:14 AM   #3
Ensign
 
Joeh's Avatar
 
Join Date: Jun 2017
Posts: 5
Default

Quote:
Originally Posted by mmwjr View Post
The upper unit has gears as well as the cone clutch, if the vent plug has a magnet and there are metallic filings on it something is failing. Does the boat still shift into forward and reverse? Does the sound change when doing so?
The vent plug does not have a magnet.
But the fluid that came out was full of metal.

I will check in the morning about noise change in gear.

Sent from my SM-G955U using Tapatalk
Joeh is offline   Reply With Quote
Old 05-09-2018, 05:18 AM   #4
member
 
Join Date: Apr 2018
Posts: 346
Default

If make noise when is not in shift, I would stop right there.
You can make more damage by gearing.
If you don't know how to fix it, go to a shop. DON'T USE IT LIKE THAT!
Gugi47 is offline   Reply With Quote
Old 05-09-2018, 12:28 PM   #5
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,606
Default

Quote:
Originally Posted by Gugi47 View Post
If make noise when is not in shift, I would stop right there.
You can make more damage by gearing.
If you don't know how to fix it, go to a shop. DON'T USE IT LIKE THAT!
At this point the OP is already looking at a total rebuild or replacement, one or two shifts will not make a difference.
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 05-09-2018, 03:00 PM   #6
Moderator

 
shrew's Avatar
 
Join Date: Apr 2008
Posts: 5,682
Default

Quote:
Originally Posted by Joeh View Post
The vent plug does not have a magnet.
But the fluid that came out was full of metal.

I will check in the morning about noise change in gear.
I've never seen a Bravo 3 drain plug that was not magnetized. The vent plug (upper) and the drain plug (lower) are the same, but metal wouldn't collect at the vent plug. The metal settles to the bottom of the drive after it has been sitting for a while (cold) and should get attracted to the lower drain plug.

Was the engine run for some time prior to draining the lube? That would disperse the metal shavings throughout the lube.

If I were to guess, I'd say you're bearings are shot, and needles are failing and getting ground in the gears like a coffee grinder. This begins to cause shearing of the gear teeth. Over time, there are more metal shavings and the noise grows not just because of the bearings, but also the grinding of the shavings in the gears.

I hit a submerged object a few years ago and sheared a tooth on an upper gear. That made one heck of a racket.
shrew is offline   Reply With Quote
Old 05-09-2018, 03:03 PM   #7
Moderator

 
shrew's Avatar
 
Join Date: Apr 2008
Posts: 5,682
Default

BTW, you would be looking at a complete rebuild. New Bearings, new seals, and more than likely, new gears. When I priced it out, it was a bit more money for a new drive, but well worth it. The Aluminum on B3's are known to corrode. I was showing corrosion on the anti-ventilation plate, the plate above and the fin. So it made more sense for me to replace the entire drive.

Your mileage may vary.
shrew is offline   Reply With Quote
Old 05-09-2018, 05:30 PM   #8
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,606
Default

shrew I agree with everything you said other than the OP stated he has BII not BIII and the BII are not as prone to the corrosion issues the BIII has.
__________________

__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 07:18 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.