Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-19-2016, 10:47 PM   #1
Senior Member
 
tegdesign's Avatar
 
City: Seattle
Vessel Name: Nordvind
Vessel Model: Nova Heritage 36
Join Date: Oct 2014
Posts: 123
Oh Geeze! Shaft came off!

So after a pleasant cruise on Lake Union last night I decided to see how the boat handled using only one engine. I fired up the post side and set off at 6 knots. Well when I was getting near the dock I fired up the STBD side. I gave the STBD side some throttle to start spinning the boat into my spot. Nothing happened. I got lots of REVs but no thrust.

I got the boat in using just the Port engine and rudder. When I went below to try to see what the problem was I saw this! And a little metal bar which fits into that slot was sitting right below the shaft.

I think dragging the prop through the water did it. But I'm sure it shouldn't have.

Can I fix this myself while the boat is still in the water?
Attached Images
 
__________________
Nordvind | 1987 36' Nova | Volvo TMD41A
tegdesign is offline   Reply With Quote
Old 03-20-2016, 04:50 AM   #2
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Join Date: Oct 2007
Posts: 16,565
Greetings,
Mr. t. This is just a guess BUT...It appears to me that the shaft is tapered and threaded on the end. Split the coupling and you'll probably find the nut that threads onto the end of the shaft between the coupling halves. Replace the shaft key (that square metal bar you found), slide the coupling half back on and torque down the nut really well. Might want to use some loctite. Check for proper coupling alignment and bolt the coupling back together.
Yup, do it in the water.
__________________
RTF
RT Firefly is online now   Reply With Quote
Old 03-20-2016, 07:08 AM   #3
Guru
 
O C Diver's Avatar
 
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,834
Before you start putting it back together, try screwing the nut down on the shaft by hand. The threads on the shaft may need to be dressed from having spun in the coupling. Don't want the nut and shaft threads to gall.

Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
O C Diver is offline   Reply With Quote
Old 03-20-2016, 08:26 AM   #4
Guru
 
Capt.Bill11's Avatar
 
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
Once you get the coupling back on the shaft you need to check your alignment before you do the final bolt up. On both engines.

And you might as well remove the nut, re-torque and put Lock Tite on the other shaft/coupler as well.
Capt.Bill11 is offline   Reply With Quote
Old 03-20-2016, 09:15 AM   #5
Senior Member
 
bilge53's Avatar
 
City: Oriental, NC
Vessel Name: M/V Major Award
Vessel Model: Senator 35 w/single Lehman
Join Date: Oct 2007
Posts: 423
Use new keystock unless the key looks absolutely perfect and check the key machining on coupling and shaft to make sure they were not damaged. You may want to replace the nuts also. Do it in the water.
bilge53 is offline   Reply With Quote
Old 03-20-2016, 09:37 AM   #6
Guru
 
dhays's Avatar
 
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
Yeah what they said.

I would just like to say that I am impressed that you were able to dock the vessel without incident after suddenly finding yourself having to do it with just one engine. I would have been generally freaked out a bit. That combined with the sudden change in how the boat handles and without the ability to spin it as you are used to... It would not have been pretty.
__________________
Regards,

Dave
SPOT page
dhays is offline   Reply With Quote
Old 03-20-2016, 09:46 AM   #7
TF Site Team
 
koliver's Avatar
 
City: Saltspring Island
Vessel Name: Retreat
Vessel Model: C&L 44
Join Date: Nov 2007
Posts: 5,663
Call a Marine Machine shop (in Vancouver it would be VM Dafoe) and find out what torque you need. Get a new key from them.
koliver is offline   Reply With Quote
Old 03-29-2016, 12:43 PM   #8
Senior Member
 
tegdesign's Avatar
 
City: Seattle
Vessel Name: Nordvind
Vessel Model: Nova Heritage 36
Join Date: Oct 2014
Posts: 123
Thanks all!

I hope you will forgive me, but I'm not even sure how to open up the coupling. Looks like I need what I can only describe as a gigantic allen wrench to turn the bolts on the shaft side of the coupling.

I have no clue what to expect to find when I do open it up.

When I turn the coupling I can hear something inside. Probably the nut Capt Bill mentioned.

The other thing I can't figure out is how I can pull the shaft back into the boat a few inches. It doesn't want to budge!

And how does one assess the alignment?

Sorry for my newbie questions. I'd love to fix this myself. I'm just a bit perplexed.

Thanks! Love this forum!!
__________________
Nordvind | 1987 36' Nova | Volvo TMD41A
tegdesign is offline   Reply With Quote
Old 03-29-2016, 01:01 PM   #9
Senior Member
 
ddalme's Avatar
 
City: LAFAYETTE,LA
Vessel Name: Relenti
Vessel Model: Atlantic 30, 1983
Join Date: Mar 2015
Posts: 451
Quote:
Originally Posted by tegdesign View Post
Thanks all!

I hope you will forgive me, but I'm not even sure how to open up the coupling. Looks like I need what I can only describe as a gigantic allen wrench to turn the bolts on the shaft side of the coupling.

I have no clue what to expect to find when I do open it up.

When I turn the coupling I can hear something inside. Probably the nut Capt Bill mentioned.

The other thing I can't figure out is how I can pull the shaft back into the boat a few inches. It doesn't want to budge!

And how does one assess the alignment?

Sorry for my newbie questions. I'd love to fix this myself. I'm just a bit perplexed.

Thanks! Love this forum!!
Hire a mechanic-check with your boat yard-might have someone on call-If you don't know what your doing you can cause more problems than what you have-should be a simple fix-hopefully no shaft damage.
ddalme is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 02:03 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012