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TOPIC: Bravo 3 stern drive, water leak into bilge what to do?

Bravo 3 stern drive, water leak into bilge what to do? 08 Nov 2016 18:24 #1

  • mctaggart
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Hello

I have got a 2005 Bayliner 288 with a Bravo 3 stern drive, which has got a very small dribble of water coming into my bilge area. Maybe a litre a week coming through my transom area.

I cant pinpoint where it is coming in apart from its directly underneath the driveshaft as its such a small amount of water, i can just see a extremely thin vein of water at the bottom of my transom where it is slowly dribbling in. This is of course salt water, so even though its a tiny amount, its no doubt causing all sorts of damage to metal components.

I am pulling the boat out for winter anyway so was after some advice on what i should do, pulling the drive off seems easy enough although anything to do with the gimbal housing looks quite specialist because of the tools i have read you need to do it.

What are you guys recomendations on what to look for and also do it my self or give it to garage?

Craig
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Bravo 3 stern drive, water leak into bilge what to do? 08 Nov 2016 18:31 #2

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Double check that the source is not coming from above the drive shaft. I suspect the upper square shaft seal (upper steering pin) very common. If in fact it's coming from just underneath the drive shaft it could be a failed u joint bellows as there is a weep hole in that drive shaft seal.

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Bravo 3 stern drive, water leak into bilge what to do? 08 Nov 2016 19:31 #3

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I will go down and get some photos of it on the weekend, plan to dry it all up and see if i can pin point it. I do remember seeing signs of water above the drive shaft where water could sit

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Bravo 3 stern drive, water leak into bilge what to do? 08 Nov 2016 22:37 #4

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You can also try moving the steering wheel to see if its steering shaft seal. and try trimming up to see if its cracked bellows

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Bravo 3 stern drive, water leak into bilge what to do? 09 Nov 2016 00:40 #5

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Been there done that and paid the bill!!! Certainly sounds like cracked bellows. Any idea when they were last serviced? If they are cracked I will warn you that the repair bill will be quite high if you're in salt water. Will mean replacing the gimble bearing and universal joint as they are finished once the salt gets to them. 2 boat-units....

Run the boat, at idle in drive and turn the wheel. If you hear a growling noise when you turn the wheel -- means the gimble bearing has corroded.

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Bravo 3 stern drive, water leak into bilge what to do? 09 Nov 2016 01:36 #6

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Where was the last time the bellows were changed?

Since you are pulling out for the winter I would check them. Also check for excessive play in the drive. If it is not bellows or shaft seal it could be coming from the transom assembly itself. That is the least likely but it is possible.

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Bravo 3 stern drive, water leak into bilge what to do? 09 Nov 2016 20:52 #7

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It is easy to check if your upper steering pin is leaking. When the boat is sitting in the water, turn the helm side to side several times, then reach under the steering arm from the engine bilge, there is a "shelf" in the inner gimbal plate. If the shelf or the space behind it is wet, the pin seal is leaking, and the shaft needs to be replaced.

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Bravo 3 stern drive, water leak into bilge what to do? 10 Nov 2016 11:58 #8

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According to what I've heard, doesn't this situation require the complete pulling of the engine to repair (unless you drill through the transom)? I have a 2000 7.4MPI Bravo III that will likely require a steering pin replacement. It's money, as I understand.

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Bravo 3 stern drive, water leak into bilge what to do? 10 Nov 2016 16:27 #9

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optimist_prime wrote: According to what I've heard, doesn't this situation require the complete pulling of the engine to repair (unless you drill through the transom)? I have a 2000 7.4MPI Bravo III that will likely require a steering pin replacement. It's money, as I understand.

The seal is quite the pita to replace. Some boats may have enough room to actually get to the shaft nut and related hardware from the engine bay without having to remove the engine. Other boats there simply isn't enough room to gain access to the parts from inside. There are kits availible to replace the shaft and seal from the exterior, this will requiered cutting an access in the top portion of the gimbal housing and also removal of Pretty much everything off the gimbal housing.
www.jrmarine.com/instructions.htm



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Dave
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www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556
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Bravo 3 stern drive, water leak into bilge what to do? 10 Nov 2016 18:50 #10

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Bellows, and in particular the small one on the shift cable.

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Bravo 3 stern drive, water leak into bilge what to do? 11 Nov 2016 02:30 #11

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If its the pin Mercruiser came out with TSB and kit for the pin repair

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Port: Sassafras River Georgetown, MD Bayliner 2000 2855 7.4

http://www.chart.state.md.us/video/video.php?feed=0601b947006500d40050fa36c4235c0a

Bravo 3 stern drive, water leak into bilge what to do? 12 Nov 2016 22:16 #12

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Thanks for all the great information, I will try to get down to the boat tomorrow and take a look and post up some pictures, when i looked last there is obvious water standing at the top where the steering pin is.

When i bought the boat this year the survey commented on the condition of the bellows as serviceable, but it was noted they were a few years old and should be kept an eye on. I hope i have caught this before its done too much damage.

WIll keep you posted the results!

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Bravo 3 stern drive, water leak into bilge what to do? 13 Nov 2016 02:09 #13

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Sounds like a service of the bellows is in the near future. If it were mine I'd do the upper steering shaft seal and square shaft (stainless version) at the same time. When they're into it that far they'll likely find some other things that'll need to be done as well.
Good luck ;)

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Dave
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www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556
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Bravo 3 stern drive, water leak into bilge what to do? 13 Nov 2016 14:26 #14

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Hello

Well i have had a dig around with my camera this morning and to be honest it looks rather grim, its not only until you get close up you can see its obviously been leaking for some considerable time, although I am getting no noise from the gimbal bearing or any grumbling sounds to say its knackered.

Here is the 4.2 D-Tronic 250hp lump as i know you boys like the GAS :P, this is the more desirable (more powerful) electronic injection version.

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A shot through my transom on top with the steering pin through the hull, there seems to be a serious amount of salt crystallization going on in there

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and a couple of videos, sorry for shaking camera around it was difficult to video!





Let me know your thoughts :) the actual leak is negligible, but i guess its been like this for so long the previous owner has left it and it looks like its caused more damage as the salt water has been allowed to sit.
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Bravo 3 stern drive, water leak into bilge what to do? 13 Nov 2016 15:40 #15

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upper square shaft SEAL needs to be replaced ASAP...

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Bravo 3 stern drive, water leak into bilge what to do? 13 Nov 2016 16:15 #16

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Is that an engine out job or can it be done with it in still?

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Bravo 3 stern drive, water leak into bilge what to do? 13 Nov 2016 16:37 #17

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You can replace the square shaft while the engine is in the boat. There are kits availible to do so.
www.jrmarine.com/instructions.htm
I fear there may be some transom core damage based on what I see in the video and it looks like some "Bravoitis" may be present also. amarket.com/BRAVOBLOCK.HTM

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Dave
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.030 over-Vortec top end-part closed cooled
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www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556
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Bravo 3 stern drive, water leak into bilge what to do? 13 Nov 2016 16:56 #18

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Not trying to make your day worse but it looks like the transom seal is allowing some water in also, you can see drips of water coming off the top of the cut out in this photo.

When the boat comes out of the water have someone bounce aggressively on the leg and look for any flexing of the transom around the gimbal housing. A solid transom will not flex.

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Dave
Edmonds, WA
"THE FIX"
'93 2556 5.7 Bravo II 2.0:1 18 1/4x19 P
.030 over-Vortec top end-part closed cooled
***The rebuild of my 2556***
www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556

Bravo 3 stern drive, water leak into bilge what to do? 13 Nov 2016 23:09 #19

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Yep. Upper swivel pin at a minimum. I did mine last year.

baylinerownersclub.org/index.php/forum/t...ivel-pin-replacement

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Bravo 3 stern drive, water leak into bilge what to do? 14 Nov 2016 19:56 #20

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If I need to also redo the waterside transom seal can this be done while the engine is in or does this require engine removal to get it off?

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Bravo 3 stern drive, water leak into bilge what to do? 14 Nov 2016 20:17 #21

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Almost impossible to get to it...
So engine removal

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Bravo 3 stern drive, water leak into bilge what to do? 14 Nov 2016 21:47 #22

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I am rather annoyed that this wasn't picked up on the survey I had done, I ended up paying nearly double what I wanted to originally as the guy was supposed to be the best in the area taking £800 off me to do it.

That was about 3 months ago, I am going to ring and demand my money back tomorrow.

This is basic stuff, water coming through the bloody transom, i had no clue at the time as the boat was new to me, it's only now through research I know what I am looking at.

What are my rights if a surveyor signs it off and it has a major defect?

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Bravo 3 stern drive, water leak into bilge what to do? 15 Nov 2016 05:49 #23

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My surveyor didn't catch it either. I'd be hesitant to conclude that the transom seal is leaking. On one hand, you have a photo that appears to show water dripping from above. On the other hand, your boat isn't that old and unless your transom is soaked and warped, those seals don't commonly just fail this soon. It could be condensation that's dripping. Unfortunately, I don't know how you could leak test that seal in a controlled environment. You may have to diagnose this through careful observation.

The upper swivel pin is almost certainly leaking. I did that job myself last year for a few hundred dollars, and that included new bellows, gimbal bearing, oil line, water line, etc

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Bryan
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Bravo 3 stern drive, water leak into bilge what to do? 15 Nov 2016 15:44 #24

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Wise words I am just experiencing the knee jerk reaction to it!

I plan to do it my self, nothing better than knowing your own boat.

While the leg is off I plan to do everything in there so I don't have to worry about it for a few years.

Could somone give me a list of all the items I should change as a matter of course while it's all off including any upgrade parts, I have heard mentioned swapping to stainless steel etc

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Bravo 3 stern drive, water leak into bilge what to do? 15 Nov 2016 16:01 #25

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Limit SW, Trim sender set,
Ujoint crosses,
Gimbal bearing,
Raw water hose,
Drive bellows, shift cable bellows,
Lower shift cable,
SS upper SQ shaft, seal,
Impeller, housing,
Anode set,

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