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20 August 2016, 15:40
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#1
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Member
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,339
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Disconnect the battery to reduce corrosion?
Does disconnecting the battery reduce corrosion on an outboard?
And if so does it matter if you disconnect the positive or negative battery lead?
Tsm
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20 August 2016, 15:47
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#2
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,109
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Quote:
Originally Posted by two stroke mick
Does disconnecting the battery reduce corrosion on an outboard?
And if so does it matter if you disconnect the positive or negative battery lead?
Tsm
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In THEORY no, it shouldn't make any difference. BUT, unless you have perfect wiring, no current leaks, perfect insulation (dry) then you can get stray currents that can accelerate corrosion. I've always had (good) battery isolators fitted to my boats. It won't hurt, I'd disconnect the +ve as close to the battery as possible.
Lions led by donkeys
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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: Don't feed the troll
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20 August 2016, 16:29
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#3
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Member
Country: UK - England
Town: Salcombe
Boat name: The Black Pig
Make: Ranieri
Length: 4m +
Engine: 60c hp tohatsu
MMSI: 235038018
Join Date: Jun 2013
Posts: 443
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I have always pondered apon this question and the the relation to galvanic corrosion and electrode potential
I know the anode and cathode relation ship causes corrosion and Is caused by electrolysis and maybe the simple disconnection or removal of the battery supply may reduce any further damage
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20 August 2016, 16:32
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#4
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Member
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 7,508
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if you fit an isolater +ve leg that will isolate the lot and also prevents drain if you do have a trickle going somewhere, the anodes on the engine will protect that, lift engine when not in use whilst afloat, paint coating is important too [chips down to bar metal] especially the in water bit to prevent electrolysis between dis-similar metals.
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20 August 2016, 18:29
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#5
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Member
Country: UK - Scotland
Town: Girvan & Tayvallich
Boat name: Breawatch
Make: Ribcraft
Length: 5m +
Engine: Mercury 150 F/stroke
MMSI: ex directory!!
Join Date: Sep 2008
Posts: 6,203
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I have an isolator. When I leave rib on mooring I switch it to the off position as I have a direct lead from bat to pump. This arrangement stops corrosion in the electrics as there is no current as Mick says in the previous post.
Sent from my iPhone using RIB Net
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jambo
'Carpe Diem'
Member of the ebay Blue RIB cover club
Member of SABS ( Scottish West Division)
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20 August 2016, 23:43
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#6
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Member
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
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Mick; saw you had a smaller boat. Is it on a trailer or kept on a mooring?
If trailered disconnecting the battery won't do anything to prevent corrosion. As said above it *might* if kept in the water.
jky
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21 August 2016, 06:28
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#7
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Member
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,339
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Jyaski I was about to mention that my boat lives in a shed
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21 August 2016, 09:36
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#8
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Member
Country: UK - Scotland
Town: Girvan & Tayvallich
Boat name: Breawatch
Make: Ribcraft
Length: 5m +
Engine: Mercury 150 F/stroke
MMSI: ex directory!!
Join Date: Sep 2008
Posts: 6,203
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Quote:
Originally Posted by two stroke mick
Jyaski I was about to mention that my boat lives in a shed
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Yea but you didn't mention that in your op!
Sent from my iPhone using RIB Net
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jambo
'Carpe Diem'
Member of the ebay Blue RIB cover club
Member of SABS ( Scottish West Division)
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21 August 2016, 10:20
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#9
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Member
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,339
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Jambo
Don't take it to heart I was just wondering as I have some heavy corrosion on the lower unit where the gear selector enters the gear box
Tsm
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21 August 2016, 10:24
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#10
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,109
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Mine lives on a trailer under a shed, but I still isolate & leave it on a permanent charger. If you use an isolator it needs to be a good one & mounted in a dry area. Bluesea in console in my case.
Lions led by donkeys
__________________
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: Don't feed the troll
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21 August 2016, 10:52
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#11
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Member
Country: UK - England
Town: bicester
Length: no boat
Engine: outboard only
Join Date: Feb 2009
Posts: 913
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Battery connect, make sure everything is switched of before connecting the earth cable last, always keep your head as far away from the battery as possible when buggering around with batteries, and don't bloody smoke near them either. Dis connecting them earth first, same safety rules apply.
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21 August 2016, 10:55
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#12
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Member
Country: UK - England
Town: bicester
Length: no boat
Engine: outboard only
Join Date: Feb 2009
Posts: 913
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I used to have a piece of equipment that measured extraneous currents in the water that plugged into my multi meter, when there was excessive corrosion on obms or inboard legs.
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21 August 2016, 11:03
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#13
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Member
Country: UK - Scotland
Town: Girvan & Tayvallich
Boat name: Breawatch
Make: Ribcraft
Length: 5m +
Engine: Mercury 150 F/stroke
MMSI: ex directory!!
Join Date: Sep 2008
Posts: 6,203
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Quote:
Originally Posted by two stroke mick
Jambo
Don't take it to heart I was just wondering as I have some heavy corrosion on the lower unit where the gear selector enters the gear box
Tsm
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Hi mick no worries I haven't. I just wanted to say that you hadn't mentioned that in your op. Hope you find the answer. Atb J
Sent from my iPhone using RIB Net
__________________
jambo
'Carpe Diem'
Member of the ebay Blue RIB cover club
Member of SABS ( Scottish West Division)
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