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17 April 2010, 19:30
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#1
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Member
Country: Ireland
Town: Cork
Boat name: Spare Rib
Make: Cobra
Length: 8m +
Engine: Out 250
Join Date: Jul 2008
Posts: 29
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Any such thing as a conductive oil ?
Looking for a conductive hydraulic or ATF oil . Is there any such thing ?
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17 April 2010, 22:01
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#2
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Member
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 6,626
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What as in "electrical" conductive?
__________________
Andy
Looks Slow but is Fast
Member of the ebay Blue RIB cover club.
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17 April 2010, 22:06
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#3
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Member
Country: UK - Scotland
Town: Glasgow
Boat name: *dunno yet*
Make: Tornado
Length: 5m +
Engine: Yama ..yeeha 75
Join Date: Feb 2006
Posts: 3,670
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ATF is transmission oil or a version of hydraulic oil ... what do you mean by 'conductive' ?
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18 April 2010, 07:15
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#4
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Member
Country: UK - Wales
Town: monmouthshire
Boat name: doggypaddle
Make: Avon 5.4 Searider
Length: 5m +
Engine: yamaha 80
Join Date: Jul 2007
Posts: 958
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Quote:
Originally Posted by Bigmuz7
ATF is transmission oil or a version of hydraulic oil ... what do you mean by 'conductive' ?
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all oils conduct heat, only conductive oils i heared of are for model train bruches.
Why ?
__________________
I am usually not as green as i am cabbage looking.
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19 April 2010, 16:46
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#5
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Member
Country: Ireland
Town: Cork
Boat name: Spare Rib
Make: Cobra
Length: 8m +
Engine: Out 250
Join Date: Jul 2008
Posts: 29
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Conductive as in electrical . My tilt rams are sitting in ATF oil and are not being earthed because of the oil and rubber O-rings therefore they are being pitted because of electrolysis . If i can find the right oil it means the rams are earthed because of the bonding on the engine and clamp bracket . All anodes are working properly with the bonding circuit but because of no earth on tilt rams the stainless is pitting
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19 April 2010, 18:25
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#6
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RIBnet admin team
Country: UK - England
Town: Swindon
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 239050687/235055163
Join Date: Jul 2005
Posts: 8,881
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Quote:
Originally Posted by The Dock
Conductive as in electrical . My tilt rams are sitting in ATF oil and are not being earthed because of the oil and rubber O-rings therefore they are being pitted because of electrolysis . If i can find the right oil it means the rams are earthed because of the bonding on the engine and clamp bracket . All anodes are working properly with the bonding circuit but because of no earth on tilt rams the stainless is pitting
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Are you leaving your engine tilted up?
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19 April 2010, 18:42
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#7
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Member
Country: Ireland
Town: Cork
Boat name: Spare Rib
Make: Cobra
Length: 8m +
Engine: Out 250
Join Date: Jul 2008
Posts: 29
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Yes , always , but passing boats create a wash which means my leg with a stainless prop is bobbing up and down in the water . Stainless , aluminium , and metals ! I'm being told is a bad mixture and the fact all is earthed except tilt rams which are sitting in oil and sleeved in rubber O-Rings means they are sitting ducks . If i could earth rams then anodes would take all stray current
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19 April 2010, 19:43
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#8
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RIBnet admin team
Country: UK - England
Town: Swindon
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 239050687/235055163
Join Date: Jul 2005
Posts: 8,881
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Quote:
Originally Posted by The Dock
Yes , always , but passing boats create a wash which means my leg with a stainless prop is bobbing up and down in the water . Stainless , aluminium , and metals ! I'm being told is a bad mixture and the fact all is earthed except tilt rams which are sitting in oil and sleeved in rubber O-Rings means they are sitting ducks . If i could earth rams then anodes would take all stray current
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Why not leave your engine down so the anodes can do their job? The rams will be touching the engine then.
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19 April 2010, 20:19
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#9
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Member
Country: UK - Wales
Town: monmouthshire
Boat name: doggypaddle
Make: Avon 5.4 Searider
Length: 5m +
Engine: yamaha 80
Join Date: Jul 2007
Posts: 958
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Quote:
Originally Posted by The Dock
Conductive as in electrical . My tilt rams are sitting in ATF oil and are not being earthed because of the oil and rubber O-rings therefore they are being pitted because of electrolysis . If i can find the right oil it means the rams are earthed because of the bonding on the engine and clamp bracket . All anodes are working properly with the bonding circuit but because of no earth on tilt rams the stainless is pitting
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surely its easier to fit a small earth strap across the eyes of the ram to ground? to bypass the rubber bushes?
__________________
I am usually not as green as i am cabbage looking.
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19 April 2010, 20:25
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#10
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RIBnet admin team
Country: UK - England
Town: Swindon
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 239050687/235055163
Join Date: Jul 2005
Posts: 8,881
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Quote:
Originally Posted by doggypaddle
surely its easier to fit a small earth strap across the eyes of the ram to ground? to bypass the rubber bushes?
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I suspect it's the trim rams that are the problem-with the engine tilted up there's no electrical contact to them so they won't get any protection from the anode.
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