Outdrive pops up in reverse...missing bracket?-gctid391113

[Guest]

I picked up a 1986 Bayliner Ciera 2755 a couple months ago...in good shape for it's age, a few issues that I'm working to resolve. It has the Volvo pentadrive 5.7L V8 and Volvo pentadrive outdrive.

I've noticed the outdrive lifts up out of the water if I give it more than just a little bit of throttle in reverse. As I understand it, there is some sort of bracket missing from the outdrive that prevents this "pop-up". Does anyone know the part#, where I'd find the part, have a picture, or just any details at all about this part?

Any help much appreciated!

Dave

[richardson]

Which drive leg do you have? Sounds like the the reverse lock is not engageing.

[2850Bounty]

This is a rather common issue with the AQ series drives prior to the C drives. Unfortunately, Bayliner never saw the best of the Volvo Penta drives due to Brunswick purchasing Mercury Marine, and ending their relationship with Volvo Penta at the end of 1986.

To understand the Reverse Latch unit, look for Bob Case's Reverse Latch thread in my BOC Vault thread titled Volvo Penta AQ series frequent Q's & A's

It's just a few links below the thread showing the prop shaft carrier puller tool.

Once this latch system is understood, it will be easy for you to repair and maintain.

.

[Guest]

Awesome....I've spotted a couple threads since this post, but hadn't found the one you mentioned. Now that I know what it's actually called ("reverse lock") I should have an easier time of it. I assume this is a part that's available, and probably (hopefully?) doesn't require the outdrive to be pulled off to install. I'll check the thread you mentioned.

Thanks!

Dave

[2850Bounty]

Edit to make a correction.

This unit is primarily a reverse latch, since the drive is lift-out capable, but during reversing it must lock and hold the drive down.

Secondarily it is an impact "break-a-way system".

(this is the "over-centering" portion talked about in Bob Case's thread)

Because of "break-a-way" feature, the latch unit must be UP and locked onto the set pin.

Likewise when reversing, the latch hooks must be UP and locked onto the set pin.

The only time that these are not latched, is when the vice rod pressure plate depresses the push rod for lift-out.

.

[Guest]

Yeah, I have gathered it has dual-purpose, so thanks for that. I definitely need reverse working well though......I'd take that over the break-away feature!

It sure seems like this device is more complicated than it needs to be. Maybe I just don't know enough about it, but I'd think the outdrive should just be 1) unlocked in forward (so it would pop-up by itself if you hit something) and 2) simply locked in reverse (so it doesn't pop up...if you hit something in reverse, it has nowhere to go anyway). Right? Or am I oversimplifying this? (Or is that how it's actually intended to work?) :hypnotysed:

Thanks!

Dave

[2850Bounty]

davesisk wrote:


It sure seems like this device is more complicated than it needs to be. Maybe I just don't know enough about it, but I'd think the outdrive should just be 1) unlocked in forward (so it would pop-up by itself if you hit something) and 2) simply locked in reverse (so it doesn't pop up...if you hit something in reverse, it has nowhere to go anyway). Right? Or am I oversimplifying this? (Or is that how it's actually intended to work?) :hypnotysed:

Dave, when working correctly, it indeed does what you suggest and would expect of it.

However, this goes way back in time.

Merc wanted the rights to use the Volvo Penta Cone Clutch.

Volvo Penta could not use Merc's external ram cylinder design.

With exception to the 280 PT drive, Volvo's first attempts at Power Trim were not good ones.

In order to protect against impact, this unit was implemented and used for many years.

What we Bayliner Owners never see, are the later Volvo Penta drives with an excellent power trim feature, while maintaining the AQ series geometry.

We see only the drives up to the 290.

.

[Guest]

Just wanted to mention something that happened to me. I see you said it should be unlocked while moving forward in case of impact. Last season my reverse lock was a mess and basicly fell apart in the water. I didnt realize it was gone and while up on plane anytime i hit chop or a wake i was getting all types of weird rpm spikes. Turns out the the outdrive was moving up and down as the boat hit the waves so it also holds your drive down while going forward.

[2850Bounty]

First, I made a correction to my wording in post #5.

cbr900rr wrote:
I see you said it should be unlocked while moving forward in case of impact. .......................

No, that is not what I said.

When in FWD, the latches are hooked just as they are during reversing.

The difference is, during reversing the lock brace prevents the latch hooks from over-centering.

While in FWD, the lock brace is UP, and allows for the over-centering in the event of an impact.

It's pretty much covered in Bob's thread.

.

[Guest]

Wasnt referring to you bounty. The op said i think in post 5 that it should be in the unlocked position while going forward in case of impact.

[Guest]

Thanks for the posts guys. I'm picking up the boat tonight from the storage place, and I'll examine this contraption to see if I can get a more clear mental picture of how it's supposed to work and what's missing on mine.

I don't know which outdrive model I have...if I post a pic, I'd assume one of you guys can probably tell me immediately?

Thanks!

Dave

[2850Bounty]

davesisk wrote:


I don't know which outdrive model I have...if I post a pic, I'd assume one of you guys can probably tell me immediately?

Dave, your 1986 Bayliner Ciera 2755 should have either the 280 or the 275 drive.... it's a bit too early for the 290.

None-the-less, the reverse latch is the same on either of these.

.

[Guest]

though it turned out it only occured when full over to one side or other on wheel.

I haven't had problem in years, don't even know if it exists anymore as my over-correcting ways while docking have since left.

Question: Is your drive/wheel centered or turned when this occurs?

[Guest]

Good question...I believe it occurred in both cases. I'll check this weekend.

Dave

[Guest]

OK, an update. The outdrive popped up in the water yesterday on reverse and a little throttle. After I got it home on the trailer, I lowered the outdrive and checked it out...it was locked down. WTH? :hypnotysed:

So, maybe I'm not getting the outdrive all the way down in the water for some reason??? Maybe it's popping loose because of too much force in reverse? (I doubt I can lift it by hand with as much force as reverse + throttle puts on it.) I haven't checked wether the steering causes the lock to disengage, but that sounds like it's worth checking while I have it here at my house.

At least I know all the parts are there, or it wouldn't lock at all...right? Best guess is that something is out of adjustment here. In all honesty, the tilt is so quiet, it IS very hard to tell when the outdrive is all the way down.

Dave