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TOPIC: Bravo Swivel Pin Replacement

Bravo Swivel Pin Replacem 31 Mar 2016 03:18 #51

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I came across these photos of how / where to drill out a stainless swivel shaft. Hope it help someone.






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Bravo Swivel Pin Replacem 31 Mar 2016 03:19 #52

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Bravo Swivel Pin Replacement 31 Mar 2016 03:43 #53

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Thank you. I was just talking with some folks about this today. I don't have a press so I I'll have to have it done. Tacoma screw is going to call me back with a price. I wonder if there would be any advantage to having more than one hole under the bushing area. Why not 2, 3, or 4 for better grease distribution?

I also spoke with the parts guy at Tacoma Marine (owner maybe). I had always thought that the grease fitting on the older drives only lubricated the top bushing. He said it did both, and those older drives never had this problem.

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Bryan
1997 2858 7.4 B2
1992 Hewescraft
Puyallup, WA

Bravo Swivel Pin Replacement 31 Mar 2016 12:31 #54

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If I did it again, I'd split the distance between the top of the seal and move the horizontal hole (under the sleeve bushing) up about a 1/4" or so. It's worth the time to do it. You'll never need to change it again.

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Bravo Swivel Pin Replacement 19 Apr 2016 04:58 #55

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I got the swivel pin drilled for grease. 1/8" wide hole down the shaft and 1/16" X2 out to the bushing area. I decided having two holes instead of one would only help with grease distribution. The first place I went, Tacoma Screw, took three days to work up a quote and finally decided they wanted nearly $450 to do it. So I found a friend that did it free. Picture to follow.

Now I must decide which type zerk to add.



I finally took these guys out of the gimbal ring today, too. What goop should I use to install the new ones? I was thinking Loctite 271.

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Bryan
1997 2858 7.4 B2
1992 Hewescraft
Puyallup, WA

Bravo Swivel Pin Replacement 19 Apr 2016 12:24 #56

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That's exactly what I used (271). I used a standard stainless zirc right where the dimple is under the label on the top end of the drive. Only needs a tiny bit of grease though.

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Bravo Swivel Pin Replacement 19 Apr 2016 18:09 #57

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Loctite 271

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Bravo Swivel Pin Replacement 21 Apr 2016 05:09 #58

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Here's my pin, ready for install.



Two questions. It looks like the top two screws that will attach the SS plate over the window I cut in the transom assembly will entering exactly where the top two bolts are buried in the housing. I've surmised that this is why JR Marine says to drill the tap no mor than 7/16". Although, perhaps it doesn't matter if I tap into one or both of them. Opinions?

Also, when I drill the grease channel, starting at the dimple, what angle will I need? I'm assuming exactly horizontal will put me through just above the top of the pin, but don't know for certain.

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Bryan
1997 2858 7.4 B2
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Bravo Swivel Pin Replacement 22 Apr 2016 03:33 #59

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Saw this the other day but forgot to respond. On my assembly the top two screw holes that hold the cover plate on apears to be 1/2" in depth and look to be out side of the top two mounting studs bores. Maybe mine is different? I think even if they line up with the stud bores and you actually make contact while drilling it wouldn't matter as the sealant would keep the water out.
Not that I've drilled for the zerk yet but id think you'd want that squared up with the surface it's mounted/threaded into.
In my pics I have an awl held 90* to the outside surface, the awl is actually in one of the top screw holes for the cover plate, the dimple is about 1/4" - 3/8" higher than the awl and centered obviously.
Drill job on the square shaft looks good B)



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Dave
Edmonds, WA
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Bravo Swivel Pin Replacement 22 Apr 2016 04:02 #60

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Just went to shop to verify. Drilling square to the outside mounting surface of the transom assembly (where dimple is) will enter the void just above the top of the square shaft.
The following user(s) said Thank You: Castaway

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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 Swivel Pin Replacement 22 Apr 2016 04:32 #61

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Thanks Dave. Drilling and assembly tomorrow. :)

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Bryan
1997 2858 7.4 B2
1992 Hewescraft
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Bravo Swivel Pin Replacement 22 Apr 2016 23:08 #62

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builderdude wrote: Just went to shop to verify. Drilling square to the outside mounting surface of the transom assembly (where dimple is) will enter the void just above the top of the square shaft.

Redid mine 3 years ago with the stainless shaft and the JR method. So Dave do you think I could drill and install a zerk with the square shaft in place?

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1990 2556
7.4 mercruiser Bravo 2 drive
Marysville Wa

Bravo Swivel Pin Replacement 23 Apr 2016 01:22 #63

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ktm fanatic wrote: So Dave do you think I could drill and install a zerk with the square shaft in place?


Won't work. Need to drill a journal down through the center of the shaft as well.

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Bravo Swivel Pin Replacement 23 Apr 2016 01:27 #64

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2001 2859 DREAMER
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Bravo Swivel Pin Replacement 23 Apr 2016 03:13 #65

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Seems you might risk blowing out the seal when the grease is injected.

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1990 2556
7.4 mercruiser Bravo 2 drive
Marysville Wa

Bravo Swivel Pin Replacement 23 Apr 2016 04:07 #66

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Loun wrote: forums.iboats.com/forum/engine-repair-an...-fitting-bravo-alpha

Has anyone tried this method?

That's the only way to get the grease above the seal without drilling the shaft. I like this method and I want to do this but it is a tight area to install a zerk when you have the cover plate mounted there. Still pondering

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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
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www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556

Bravo Swivel Pin Replacement 23 Apr 2016 13:43 #67

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Seems like that would work. I think a zirk installed from the side might be easier. It isn't the lower that causes the leak though. Usually keeping the upper greased is what's really important.

Give it a try and let us know.

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Bravo Swivel Pin Replacement 23 Apr 2016 14:21 #68

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I am going to do it as soon as i find a stainless zerc. I read that the corrosion on the lower destroys the seal and allows water to leak. My goal is to extend the life of that seal.

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2001 2859 DREAMER
Bohemia River Maryland

Bravo Swivel Pin Replacement 23 Apr 2016 15:31 #69

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SomeSailor wrote: Seems like that would work. I think a zirk installed from the side might be easier. It isn't the lower that causes the leak though. Usually keeping the upper greased is what's really important.

Give it a try and let us know.

There's only the one seal bellow the lower bushing of the shaft, I'd think the "grease cushion" just above, around, or even through the seal itself is what helps protect the seal. I am thinking of drilling from the side, but my assembly is still on the work bench so I could just bite the bullet and pull it out and drill as castaway did. Just one more thing to do :silly:

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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
Last Edit: by builderdude.

Bravo Swivel Pin Replacement 23 Apr 2016 16:53 #70

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Uhm ;)

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Bravo Swivel Pin Replacement 23 Apr 2016 17:17 #71

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Ruffryder wrote: Uhm ;)

Yea, I know....... :lol:

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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 Swivel Pin Replacement 25 Apr 2016 00:02 #72

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I installed the zerc today, added a few pumps of grease, didnt want to blow out the seal. Took less than 15 minutes.

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2001 2859 DREAMER
Bohemia River Maryland

Bravo Swivel Pin Replacement 25 Apr 2016 00:03 #73

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Loun wrote: I installed the zerc today, added a few pumps of grease, didnt want to blow out the seal. Took less than 15 minutes.

Pics or it didn't happen :silly:

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Dave
Edmonds, WA
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'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 Swivel Pin Replacement 25 Apr 2016 00:15 #74

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I misunderstood where you were drilling. I was thinking you were talking the lower swivel pin. I don't think I'd want drill into and through a bushing to push in grease. Maybe if it was dissembled, but you're near guaranteed to get some shavings in behind the bushing and you're also drilling into the shaft a bit to get through the bushing. I'd just pull the upper pin and drill it or leave it alone otherwise.

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Bravo Swivel Pin Replacement 25 Apr 2016 03:04 #75

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On older Mercruiser drives, grease pumped in thru the factory installed zerk most likely prevented the Steel shaft from rusting.
I don't really see these upgraded SS shaft rusting in anyway.
If you are going to drill thru the shaft...hole on top like in the pic SS posted in post #32 is the only way I see to feed thru.

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Joon, Kathy, Jaden & Tristan
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Life is Good
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