Reply
 
Thread Tools Search this Thread
 
Old 23 July 2018, 05:09   #1
Member
 
Country: UK - England
Length: 7m +
Join Date: Feb 2014
Posts: 62
Hard Reverse - Transom damage?

Hi folks,

I've recently acquired a 'floating dock' and after a bit of fettling it is pretty easy to drive onto however getting off is requiring a good deal of power in reverse and my motor (Evinrude 150) tends to be thrashing around a lot before the boat un-sticks and slides off the dock.

I am concerned that over the longer term this is not ideal..! I don't want to cause undue stress to the transom or potentially catastrophically damage something.

I would appreciate your views!
__________________

__________________
Revenger715 is offline   Reply With Quote
Old 23 July 2018, 05:21   #2
Member
 
Maximus's Avatar
 
Country: UK - England
Town: Wild West
Boat name: No Boat
Make: No Boat
Length: under 3m
Join Date: Jan 2008
Posts: 4,711
Send a message via AIM to Maximus
I'm not sure you've much too worry about whithout seeing the operation ....but something to enablele less friction reversing and or raising the angle of the Dock slightly sounds like it would be a good idea.
__________________

__________________
A clever Man learns by his mistakes..
A Wise Man learns by other people's!

The Road to HELL ..is Paved with "Good inventions!"
Maximus is offline   Reply With Quote
Old 23 July 2018, 05:50   #3
Member
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 9,249
RIBase
As Matt says, difficult to advise without seeing the setup. I used to have a very heavy inboard rib that was a bugger to get off the trailer if we were launching in shallow water. I rigged a snatch block at the back of the trailer, ran the winch rope down the trailer, through the snatch block & back to the bow eye. This enabled me to winch the boat OFF the trailer. Maybe you could rig something similar on your dock.
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4:https://www.youtube.com/watch?v=unkIVvjZc9Y
Pikey Dave is offline   Reply With Quote
Old 23 July 2018, 05:56   #4
Member
 
Country: UK - England
Town: penzance
Boat name: not named
Make: ski boat
Length: 5m +
Engine: 150 HPDI
Join Date: Sep 2013
Posts: 224
You really can't overload a transom by going hard astern. The forces are insignificant compared to normal use & trailering on a bumpy road.
__________________
simonl is offline   Reply With Quote
Old 23 July 2018, 06:31   #5
Member
 
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 10hp Yam / 150hp opt
Join Date: Sep 2003
Posts: 1,945
RIBase
Your floating dock supplier should be able to provide a winching kit to allow you to winch the boat off is required.
__________________
Searider is offline   Reply With Quote
Old 23 July 2018, 10:01   #6
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: Tohatsu 30HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 11,016
Hard Reverse - Transom damage?

Is the problem that the prop isnít in clear water because the dock is in the way? Ie itís a bit like putting a short shaft engine on an extra long shaft transom?

I saw a dock recently which had one block missing at the aft keel - I assume to mitigate that issue.
__________________
Poly is offline   Reply With Quote
Old 23 July 2018, 10:07   #7
Member
 
Fender's Avatar
 
Country: UK - England
Make: Zodiac
Length: under 3m
Engine: Scull
Join Date: Dec 2014
Posts: 361
Quote:
Originally Posted by Searider View Post
Your floating dock supplier should be able to provide a winching kit to allow you to winch the boat off is required.
+1

This is normal practice, what I hate to see ( there's floaty docks in the marina near me ) is a boat owner start up their pride and joy, engine stone cold and then they rev the cr*p out of it to leave the dock . Can't be good for the lump
__________________
Fender is offline   Reply With Quote
Old 23 July 2018, 10:08   #8
Member
 
Country: UK - England
Length: 7m +
Join Date: Feb 2014
Posts: 62
actually that does make sense - although mine is a 'long-shaft' motor there is certainly not much clear water between the prop and the start of the deck - less than a foot. I'm also currently driving it on a bit too far each time.

Thinking of a hand winch option to winch the boat back a bit first - anyone seen a neat solution?
__________________
Revenger715 is offline   Reply With Quote
Old 23 July 2018, 10:18   #9
Member
 
Country: UK - England
Length: 7m +
Join Date: Feb 2014
Posts: 62
And I warm my motor up for a good 10 minutes while I prep the boat, then 20 or 30 seconds on a light reverse throttle which is meant to wash some water up onto the dock before I then give it the beans to actually move the boat. Hopefully enough mechancial sympathy..!

It is a MarineFloor dock - very common in Europe but not so in UK.
__________________
Revenger715 is offline   Reply With Quote
Old 23 July 2018, 10:27   #10
Member
 
Fender's Avatar
 
Country: UK - England
Make: Zodiac
Length: under 3m
Engine: Scull
Join Date: Dec 2014
Posts: 361
Quote:
Originally Posted by Revenger715 View Post
And I warm my motor up for a good 10 minutes while I prep the boat, then 20 or 30 seconds on a light reverse throttle which is meant to wash some water up onto the dock before I then give it the beans to actually move the boat. Hopefully enough mechancial sympathy..!

It is a MarineFloor dock - very common in Europe but not so in UK.
Some systems use adjustable buoyancy at the rear of the dock to change the angle of the ramp, allowing easy entry and exit, then raising the stern of the craft to keep the boats transom completely out of the water while on the dock
__________________
Fender is offline   Reply With Quote
Old 04 October 2018, 02:41   #11
Member
 
Country: UK - England
Length: 7m +
Join Date: Feb 2014
Posts: 62
Just an update on this - new technique is to have the boat in reverse (low rpm) for a minute or two which washes water up on to the dock, and then few more revs and boat slips off easy peasy when you know how ...!!
__________________
Revenger715 is offline   Reply With Quote
Old 04 October 2018, 05:10   #12
Member
 
Country: UK - England
Town: plymouth
Boat name: Rivvet
Make: Waveline
Length: 4m +
Engine: 20HP Tohatsu MFS20E
MMSI: 235916765
Join Date: Aug 2018
Posts: 44
Quote:
Originally Posted by Revenger715 View Post
Just an update on this - new technique is to have the boat in reverse (low rpm) for a minute or two which washes water up on to the dock, and then few more revs and boat slips off easy peasy when you know how ...!!
indeed water is a good lubricant...
__________________

__________________
plymjack is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:18.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×