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03-08-2020, 06:23
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#1
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Registered User
Join Date: Jul 2019
Posts: 4
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Hit my first rock
I was at gear speed and it hit hard enough to stall both Diesel engines. I have been under the boat and can see minor damage to both props. There is no vibration while underway at any speed. My question is, should I haul out immediately and have the props done or can I wait for the fall hall out in October?
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03-08-2020, 06:45
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#2
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Registered User
Join Date: Nov 2017
Location: Currently St. Petersburg Florida
Boat: Ovni 37 Sonate
Posts: 399
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Re: Hit my first rock
Just have the props pulled in the water. The dive company I used to work for did this all the time and it was very reasonable at $65 an hour for the work. They would even deliver them to the prop repair company and pick them up/reinstall.
If your not seeing damage to the hull or other running gear- I see no reason to haul.
__________________
To really live you must realize your limits do not exist.
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03-08-2020, 07:29
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#3
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Registered User
Join Date: Apr 2004
Location: Southern Maine
Boat: Prairie 36 Coastal Cruiser
Posts: 3,081
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Re: Hit my first rock
Quote:
Originally Posted by Delray
I have been under the boat and can see minor damage to both props. There is no vibration while underway at any speed.
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In my experience the above are contradictory sentences. Hitting rocks is a big deal, even with no visible damage.
If you're not going to run the boat, then waiting to fix it makes perfect sense. Otherwise, if you value your transmissions and running gear, haul the boat now and have the props, shafts, struts, logs and engine alignment checked.
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03-08-2020, 07:32
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#4
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Moderator Emeritus
Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
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Re: Hit my first rock
Vibration is the issue, if there is no vibration, there is nothing wrong, but watch the stuffing boxes when underway to see if your getting in excess water, and watch to see if the shafts are turning true, they are or they would be vibrating, but can’t hurt to look.
You got lucky, I’ve seen boats “bump” sand bottoms and do tens of thousands of dollars damage.
Of course the most conservative response is haul immediately, but if there are no vibrations I would wait myself.
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03-08-2020, 08:26
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#5
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Registered User
Join Date: Jul 2009
Location: 2023 - Colombia
Boat: Amazon 49 cutter, custom steel boat built in Surrey, Canada
Posts: 841
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Re: Hit my first rock
I don't know what type of boat you have, but it sounds like to props are what impacted the rock, not any part of the keel. Is that correct?
Not having vibration after the impact is a good thing. If you want to put concerns to rest, paying a diver for an inspection may be a good idea. An experienced diver may see damage that you did not see. Or, on a positive note, may tell you that it was indeed only minor damage and you will be fine. Either way, in lieu of a haulout, in your place I would get an opinion from someone experienced in boat drivetrains.
Also, the place to check engine alignment is while the boat is in the water, not while hauled out. I think that would be a worthwhile task to complete, also.
Cheers!
Steve
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03-08-2020, 08:43
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#6
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Registered User
Join Date: May 2013
Location: Toronto
Boat: Small yellow rubber ducky
Posts: 706
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Re: Hit my first rock
Your first rock.
And so many more to come.
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03-08-2020, 08:46
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#7
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Registered User
Join Date: Mar 2018
Location: www.mvmojo.com
Boat: Robt Beebe Passagemaker 49-10 in steel
Posts: 424
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Re: Hit my first rock
Call your insurance company. You struck a submerged object. That's usually covered by the policy. They will likely pay for a haul out and inspection then decide where to go from there.
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03-08-2020, 08:52
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#8
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Registered User
Join Date: Oct 2019
Posts: 756
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Re: Hit my first rock
Unless you are absolutely sure that there is no other damage than the props, I would haul it out.
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03-08-2020, 09:05
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#9
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Registered User
Join Date: Jan 2019
Location: Vancouver B.C.Canada
Boat: Century Raven 17'
Posts: 436
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Re: Hit my first rock
Can you get a picture of the props and post it in here? That might provide more information. How much damage was done, and does it look like it might unbalance things?
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03-08-2020, 09:12
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#10
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Registered User
Join Date: Apr 2012
Location: Portland Oregon
Boat: Leopard 45
Posts: 325
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Re: Hit my first rock
If you are in a sailboat your keel is going to hit before the prop. I'd have the diver check there when he pulls your prop. Your should be able to run the engine in gear with the props off to check the shaft alignment.
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03-08-2020, 09:20
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#11
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Moderator
Join Date: Sep 2014
Location: Channel Islands, CA
Boat: 1962 Columbia 29 MK 1 #37
Posts: 14,262
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Re: Hit my first rock
I don't have a power boat but I'd be more inclined to follow what Capt Tom said. If something is damaged or broken, and you don't see it yet, it will probably make itself known at 3 am on a rough night. I crewed on a boat once that had "minor damage" done to its spade rudder due to a grounding. Sure enough, right on time, at 3, a month later it broke off completely.
__________________
DL
Pythagoras
1962 Columbia 29 MKI #37
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03-08-2020, 09:29
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#12
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running down a dream
Join Date: Mar 2006
Location: Florida
Boat: cape dory 30 MKII
Posts: 3,106
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Re: Hit my first rock
the props need to be fixed .. but if no vibration then it can probably wait. take a close look at the shaft and coupling when at the dock and underway. did you get a good look at the rudder and keel while underwater? another opinion might be a good idea here.
__________________
some of the best times of my life were spent on a boat. it just took a long time to realize it.
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03-08-2020, 09:43
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#13
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Registered User
Join Date: Oct 2008
Boat: Custom cutter, 42'
Posts: 701
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Re: Hit my first rock
I'm going to disagree with the prior statements about "no vibration = no problem". If the impact bent or moved the struts so that the bearings are misaligned on the shaft there may not be any vibration but there will be heavy bearing wear.
I'd suggest testing for this by manually rotating both shafts with the transmission in neutral. They should spin pretty easily. If they are very hard to turn that is evidence that something is wrong re alignment.
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03-08-2020, 09:46
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#14
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Registered User
Join Date: Mar 2012
Location: Madeira Park, BC
Boat: Custom steel, 41' LOD
Posts: 1,372
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Re: Hit my first rock
I find it hard to believe that if you hit hard enough at "gear" (?) speed to stall both engines that you have not done significant damage to something. What hit first: the keel? Struts? Shafts? Props? And you're not getting any vibration? Incredible!
(Most of us around here are experts on this subject
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03-08-2020, 09:47
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#15
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Registered User
Join Date: Jul 2008
Location: Satellite Beach, FL
Boat: Brewer 44' Steel
Posts: 391
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Re: Hit my first rock
Just had similar incident but NO rock. Hauled out for other reasons after trip to Turks from FL. and saw minimally bent prop tips. Further inspection revealed slightly bent shaft as well. No ideas what caused it but NO rock. Haul lt and be sure. Russ
__________________
Russ
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