Reply
 
Thread Tools Search this Thread
 
Old 20 October 2013, 03:46   #1
Member
 
Country: Australia
Town: NSW
Length: 4m +
Join Date: Sep 2013
Posts: 308
Outboard corrosion, no good?

Ive got an outboard on offer cheapish, 2005 Johnson. Problem is its off a yacht and has a bit of corrosion under the paint around the leg and transom bracket.

Is this unfixable or expensive?
__________________

__________________
SpearRib is offline   Reply With Quote
Old 20 October 2013, 05:04   #2
Member
 
colcreate's Avatar
 
Country: UK - England
Town: Cheshire
Boat name: Gollione
Make: Avon Searider 5.4
Length: 5m +
Engine: 90hp
Join Date: Jun 2010
Posts: 347
RIBase
The corrosion you can see might be cosmetic and easily fixable, rub down prime and paint etc. Without pictures and more info who knows? 2 stroke or 4 stroke, model?
It might also be an indication though on the corrosion you can't see inside the engine or to the lack of general care and maintenance. On a yacht as an auxiliary it may have been used infrequently in salt water and never flushed out. Could be about to turn into dust on the inside or could be mint.....
__________________

__________________
colcreate is offline   Reply With Quote
Old 20 October 2013, 05:19   #3
Member
 
Country: Australia
Town: NSW
Length: 4m +
Join Date: Sep 2013
Posts: 308
Thanks col, that was my concern. Might be hard to get pics. So far the only visible corosion is under paint, nothing major just bubbled paint, but who knows what is on the inside. Whats the easiest way to see what the inside is like, ie cooling system etc?
__________________
SpearRib is offline   Reply With Quote
Old 20 October 2013, 06:04   #4
Member
 
colcreate's Avatar
 
Country: UK - England
Town: Cheshire
Boat name: Gollione
Make: Avon Searider 5.4
Length: 5m +
Engine: 90hp
Join Date: Jun 2010
Posts: 347
RIBase
Model?
A bit of paint bubbling on the leg of an 8+year old motor is probably nothing to worry about and is easily sorted.
There again I have seen auctions for corroded spares & repairs outboards of the same age, must have had a hard life!
Without pulling bits off and looking inside for corrosion you can't say and if getting a photo is a problem I expect there is even less chance of getting the spanners out.
Usually easiest part to remove to examine internal waterways on a two stroke is the thermostat cover but general overview of how the motor looks, runs and pumps water will give you an idea if it's junk or not. Let it run to operating temp for a while and do all the usual checks on buying a 2nd hand outboard. Research the model on the net to see if there are any common issues.
__________________
colcreate is offline   Reply With Quote
Old 20 October 2013, 06:17   #5
Member
 
Country: Australia
Town: NSW
Length: 4m +
Join Date: Sep 2013
Posts: 308
its a 8hp. ill ask to view it running and if i can remove the thermo cover for a looksy. mate of a mate so hopefully not too difficult.
__________________
SpearRib is offline   Reply With Quote
Old 20 October 2013, 07:18   #6
Member
 
spartacus's Avatar
 
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 60hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 3,268
RIBase
Check the sacrificial anodes on the outboard. These are made of zinc so that electrolysis doesn't destroy the main body of the outboard. Relatively cheap to replace. If you remove the thermostat - remember to renew the gasket.
__________________
Is that with or without VAT?
spartacus is offline   Reply With Quote
Old 20 October 2013, 16:21   #7
Member
 
Country: Australia
Town: NSW
Length: 4m +
Join Date: Sep 2013
Posts: 308
maybe i wont remove the thermostat then hehe. the anode is actually good looking. strange. the corrosion is some surface bubbling at the round part of the leg where it meets the prop (the area that houses the seals etc)
__________________
SpearRib is offline   Reply With Quote
Old 21 October 2013, 12:51   #8
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,610
You say its off a yacht. Chances are that end has been dipping it the water, and so any galvanic nonsense Will have been concentrated there.

On the flip side, the reason I no longer have a Yam on my transom is I went to change the 'stat and found the whole head had turned to shortbread through an 0.526" earth strap in the bowels of the tray snapping long long ago...

Check any anode sizes with new ones- you might be surprised!
__________________
9D280 is offline   Reply With Quote
Old 21 October 2013, 14:55   #9
Member
 
spartacus's Avatar
 
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 60hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 3,268
RIBase
Quote:
Originally Posted by 9D280 View Post
On the flip side, the reason I no longer have a Yam on my transom is I went to change the 'stat and found the whole head had turned to shortbread through an 0.526" earth strap in the bowels of the tray snapping long long ago...
Funny you should mention that... on my Twatsoo there was an earth wire near the lower leg to the mid leg that had broken its connection. Luckily I spotted it before it caused any damage.
__________________
Is that with or without VAT?
spartacus is offline   Reply With Quote
Old 22 October 2013, 12:40   #10
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,610
Lucky. I now check the Merc regularly...

... And before you all think I measured the wire to one thou' accuracy- I'm putting that down to fat fingers on a small keypad!
__________________

__________________
9D280 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 18:21.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.