Broken transom shield 4.3 Volvo Duo prop

[av8erdunn]

I recently purchased a twin engine 2004 Chaparral 290 Signature in need of repair from a buddy of mine. He hit something and broke the transom shield on one out drive and the gimbal on the other side. The engines are 4.3 Volvo Penta with a transom shield assembly part number of 3868844. If you buy the assy it comes with the rams, gimbal and pump assy for my application but I dont need the whole thing. The lower unit is a DP-SM duo prop 2.32 gear serial number is 4202076920 if that will help any. I guess my question is, if I can find just the external transom shield ring, will a ring from a sx be the same as a ring for a DP? Also what about the Gimbal? I have been looking for a manual for a part number break down so if need be I could order just the piece instead of the assy but havent had any luck.

I can see spending $4000 for a whole assy if it isn’t needed.

Any input would be greatly appreciated.

 

[Saline Marina]

Apologies, double post.

 

[Saline Marina]

I cannot see the pictures that I think you posted. If they are aluminum its a possibility they can be removed, cleaned, and tig welded back to service.

 

[dypcdiver]

I am almost certain the SX transom shield is exactly the same, look up the part numbers and see if they are the same.
I presume the pictures that can't be viewed are of the damage!

 

[av8erdunn]

L I haven't been able to locate just the sing part numbers for the shield itself. All I have found is the whole assy. I will try to call volvo today to see what they say. I will also try to upload pics again. Yes it is pics of the damage.

 

[av8erdunn]

Pics are showing up on the desktop version of the site for me. Let me know if this is not the case for others and I will go a different route. I really dont want to try welding since I Have to pull the engine to replace the shield and dont want to risk it breaking and having to do it again. Its a royal pain on this boat.

 

[av8erdunn]

I spoke with Volvo and they gave me the part number I needed. Now to confuse me even more the mechanic that quoted the repair said to order a 3868844 shield away if I look at the data plate it states a 3868845 is used. That being said I can't find anything on a 45. I can find abundance of info on the 44 though.

 

[dypcdiver]

That number is the complete unit including pistons etc. I would doubt you need it all, without seeing the pictures though we can't tell. You must link to the actual directory where the pictures are, not to a link on your desktop (that is just a shortcut) however if you right click on the desktop and select "properties" then on location or target that is where the photo is.
BTW just looked up the prices oh just the Transom Shield housing ie. just the bit that bolts to the transom and they are $900/$970 as opposed to the complete shield at $4000. Your choice.

You might want to look at this post.
http://forums.iboats.com/forum/engin...sembly-cracked
And here is a link to the Parts diagrams
http://www.volvopentashop.com/Volsp...dTransmissions/7746040/7746040_44/7746040_006

 

[av8erdunn]

Try this

 

[Saline Marina]

Yea, probably not the best candidates for welding. Some reinforcement would probably be in order and that would look sort of cobbled. I go back on my original advice and think wrenching and new parts is the best tactic.

 

[dypcdiver]

That's a bit serious.
How much damage has been done to the outdrive legs, are the props/shafts/lower skegs etc. bent or damaged?
Has your buddy told you exactly how this damage was done? I would suspect that both the gimbal rings will need replacing, not just the broken one. The $4000 each for the complete assembly is starting to look attractive, only if the existing legs are still good. Quite a big job having to remove both engines to replace the transom shields.
Looks like you have yourself a winter project, hope the price you paid for the boat makes it worthwhile.

 

[av8erdunn]

He hit something submerged under the water.skegs are fine, one of the props is slightly bent and when I say slightly I mean slightly. Prop shafts have been checked with a runout gauge and are true. The shield broke on one side and the gimbal broke on the other side. I ended up finding a used assy that I am negotiating on right now so I could use the gimbal for one side and the shield for the other. The only other thing is one out drive with the bent prop isn't turning when put in gear. Once I dig further into it i will know for sure butI don't think there is that much wrong with it. I am thinking one of the universal joints may be broken. And as for price, I could spend 25k on it and still be in it right.

 

[dypcdiver]

Glad to hear you got it at the right price, On the drive that the transom shield is broken there has been damage to the trim sender, logically that is almost impossible without something getting deformed. I think that needs some careful checking for damage/distortion to gimbal ring and it's mountings.
Keep us informed as things progress.
There are thousands of those drives around, I'm sure they turn up on Ebay etc from time to time.

 

[av8erdunn]

Yes the sender is broken, the whole top of the shield is broken and only held on by the gimbal therefore the drive had side to side play in it and allowed the sender to be damaged. I was going to R&R myself but I have a mechanic i think I'm going to get to do it. My biggest problem is getting the engine out; only about 8 inches is sticking out from under the deck. The rest of it is recessed under which would be a pain getting the engine out. If I could figure out how to get the engine out I would tackle it but as of right now I'm puzzled.

 

[av8erdunn]

Also why would you suspect both gimbals need replacing?

 

[dypcdiver]

Also why would you suspect both gimbals need replacing?

To damage the transom shield there has had to have been a very high load, which will have been transmitted through the top gimbal ring bearing/steering pivot.
As a guess I suspect the damage was done whilst going astern. On the other drive a similar load has fractured the gimbal ring at the trim tilt pivot pins which takes a lot of doing.

May be worth while asking Mr Chaparral how he got the engines in (or out), if your lucky it may not have been before he put the deck moulding on!
Have fun.

 

[av8erdunn]

Well I got the transom shield away ordered and as of right now i have made the decision to just have my mechanic do the install. Once I do more research I may change my mind but not as of right now. I will keep y'all posted.