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Volvo Penta DP-SM won't shift after rock hit
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Author:  TDC720 [ Fri Sep 02, 2011 9:01 pm ]
Post subject:  Volvo Penta DP-SM won't shift after rock hit
I was cruising approx 15 knots until I hit something. It sounded like my outdrive just slipped out of gear. Quite a bang though. Shut the engine immediately and threw anchor. Raised the outdrive to see all 3 blades on the large prop were bent. Shifted into forward. Props turn in both directions. Same in reverse. Took the cover off. linkage shifted normally. After the time spent troubleshooting and calling the towing service I could see the the rocks I hit. The tide was going out. Couldn't see them. I was lucky my boat doesn't have a hole in it. My question is. After an incident like this, am I better off replacing the entire drive being 12 years old or is it safe to assume it's just the lower unit. I won't be replacing until spring. Anyone know of a reputable place in the NY area to purchase a new or rebuild? Anyone have a good experience ordering online. My marina is good but they will be $$$$$$$$. BOAT= break out another thousand. Thanks, Todd
Author:  aguyindallas [ Fri Sep 02, 2011 10:59 pm ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
Todd, I don't want to be captain obvious, but isn't this something your insurance company would cover?
Author:  taz42169 [ Sat Sep 03, 2011 5:27 am ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
aguyindallas wrote:
Todd, I don't want to be captain obvious, but isn't this something your insurance company would cover?


+1
Author:  298VISTA2000 [ Sat Sep 03, 2011 6:48 am ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
When you hit bottom with your prop, there is a shaft coupling that is supposed to break-away to protect the lower unit. Don't ask me how I know this.
Author:  kroache [ Mon Sep 05, 2011 7:30 pm ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
298VISTA2000 wrote:
When you hit bottom with your prop, there is a shaft coupling that is supposed to break-away to protect the lower unit. Don't ask me how I know this.


:lol: Well a funny thing (not really) happened to me this weekend after almost 20 years of "not hitting bottom with my prop" boating. Next weekend I have to go back to the marina and put the boat on the trailer to check the damage. I do know one of the props is bent but most folks I've spoken with state the lower unit should be fine. If no obvious damage other than the bent prop I figure I'll just replace it. I do wonder though if the lower unit should be checked either way??

Kevin
Author:  TDC720 [ Thu Sep 08, 2011 8:49 pm ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
Insurance co pays 55% depreciation because of the age of the drive. Still need to pull the boat to get an estimate. At least they cover the haul out 100%
Author:  mcraigchr [ Fri Sep 09, 2011 9:11 am ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
kroache wrote:
298VISTA2000 wrote:
When you hit bottom with your prop, there is a shaft coupling that is supposed to break-away to protect the lower unit. Don't ask me how I know this.


:lol: Well a funny thing (not really) happened to me this weekend after almost 20 years of "not hitting bottom with my prop" boating. Next weekend I have to go back to the marina and put the boat on the trailer to check the damage. I do know one of the props is bent but most folks I've spoken with state the lower unit should be fine. If no obvious damage other than the bent prop I figure I'll just replace it. I do wonder though if the lower unit should be checked either way??

Kevin


You might look into having your prop(s) rebuilt. I have had mine done and it saved lots of $$$. Stainless props are awfully expensive. Not sure where you're located, but in North Texas there is a place that rebuilds them in a couple of days.

Craig C.
Author:  kroache [ Fri Sep 09, 2011 7:19 pm ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
mcraigchr wrote:
kroache wrote:
298VISTA2000 wrote:
When you hit bottom with your prop, there is a shaft coupling that is supposed to break-away to protect the lower unit. Don't ask me how I know this.


:lol: Well a funny thing (not really) happened to me this weekend after almost 20 years of "not hitting bottom with my prop" boating. Next weekend I have to go back to the marina and put the boat on the trailer to check the damage. I do know one of the props is bent but most folks I've spoken with state the lower unit should be fine. If no obvious damage other than the bent prop I figure I'll just replace it. I do wonder though if the lower unit should be checked either way??

Kevin


You might look into having your prop(s) rebuilt. I have had mine done and it saved lots of $$$. Stainless props are awfully expensive. Not sure where you're located, but in North Texas there is a place that rebuilds them in a couple of days.

Craig C.


Curious about the prop rebuild....did everything seem fine afterwards? I'm up near Toronto (Ontario, Canada) but did speak with a Volvo Penta dealer near me today. I was inquiring about a prop wrench and asked about replacement cost for the propeller (he said about $800 but I wondered afterwards if he realized it was SS - not aluminum). Anyway he mentioned that they will repair the prop for around $250.00

Tomorrow I'll put it on my trailer and see how things look. I do like the idea of the rebuild so hopefully that will work out OK.

Thanks!!

Kevin
Author:  Jafo4U [ Sat Sep 10, 2011 4:44 am ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
My dealer dinged the prop when they shipped it and my boat arrived with no prop Grrrreat!!! I bitched like a madman about not having my original pair to go boating and mentioned legal action so they sent me a new pair of DP and the rebuilt pair also. I have gone out with both and can't notice a difference between them. I actually kept the rebuilt pair on the boat and have the new pair in my garage just in case. From what I hear the DP is 700 or more for the pair so 250 to rebuild them sounds like a bargain and trust me you won't see any difference in speed at least I haven't. Good luck, BTW if your installing the props yourself make sure you grease the splines with the proper marine grease and don't do what I did untighten and tighten the rear bolt with a torgue wrench from beginning to end it screwed up my torque wrench. My uncle a gm tech told me you untighten with a regular wrench and tighten it up to a point and only use the torque wrench for two clicks or so to make sure it doesn't hurt the internals. I hope this helped
Author:  LouC [ Sat Sep 10, 2011 11:07 am ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
The grease on the prop shaft splines is a must esp on Volvo DPs...
The best one I have found is OMC/Bombardier triple guard grease, this is a very thick sticky water proof grease that sticks like crazy, I put it on the prop shaft in April, boat goes in salt water in May, comes out in Oct and the grease is still there, prop would fall off with out the nut. Same on the driveshaft splines, the grease is still there and looks new when I remove the drive each fall. I use this stuff on my vehicles too, door checks, hinges, nuts and bolts prone to rust. Better than anti seize....just not for high heat...
Author:  kroache [ Sat Sep 10, 2011 10:48 pm ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
Hey Jafo4U - thanks for the rebuild feedback. That makes me feel much better. Good thought on doing the lube job while it's apart. I'll take your advice on the torque wrench...mine has a nice long handle so it's tempting to use it for extra leverage when removing the rear bolt.

Thanks LouC for the recommendation also. I'll be checking with marine store where I've ordered the prop wrench (pick that up Monday or Tuesday).

Well I put the boat up on the trailer today to get a better look at things. It seems that only the outer propeller is damaged. It has a bend in one of the fins but everything else looks good. I was in the process of bringing the boat up on plane when it hit (still shaking my head that I let it happen :) so the rear prop would have been deepest in the water. So I'll go back to remove the prop and send it in for the rebuild....if that all works out OK I'll be about $300 poorer. I initially figured a much higher amount so I'll gladly take it as a lesson learned :)

Thanks again!

Kevin
Author:  298VISTA2000 [ Sun Sep 11, 2011 8:24 am ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
kroache wrote:
It has a bend in one of the fins but everything else looks good.


When I hit bottom, I also had a bend in the fin and the boat tech refused to try and bend it back for fear of it breaking. I left it as is and didn't notice it running any different.
Author:  taz42169 [ Sun Sep 11, 2011 4:21 pm ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
What about your skeg? Can't imagine you didn't ding that as well. Check it while you're at it.
Author:  TDC720 [ Thu Sep 15, 2011 4:44 pm ]
Post subject:  Re: Volvo Penta DP-SM won't shift after rock hit
I haven't taken the boat out of the water yet. Probably next week since I'm off. When I raised the outdrive I noticed the outer prop has one bent blade. Can be straightened and tuned. The large prop is another story. Chewed up pretty bad. I do have a spare from the previous owner. The skeg has been sheared off about half way.
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