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Old 17 August 2008, 16:03   #1
Member
 
Country: Ireland
Town: Cork
Boat name: Spare Rib
Make: Cobra
Length: 8m +
Engine: Out 250
Join Date: Jul 2008
Posts: 29
Electrolysis !!!!!!!!!!

Have issues with trim rams on outboard. Being told it is down to electrolysis as trim rams are sitting in oil and supported by rubber seals which means rams cannot be earthed. I have a large earth cable connected from negative on battery to transom bolt of outboard. Is this correct? All wiring is o.k. Should i switch off main power isolator switch when boat not in use? All anodes are o.k and signs of corrosion on all which i hope means all are working o.k. I desperately need help and advice no matter how trivial or easy it seems to be i will take all advice gladly and hopefully put this problem to bed! Cheers Guys!!
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Old 17 August 2008, 16:12   #2
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Country: UK - Scotland
Town: Inverness
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Make: none
Length: 5m +
Engine: none
MMSI: none
Join Date: Mar 2007
Posts: 1,908
One side of the ram must be firmly attached to the main part of the outboard, even with an insulating bush surely a wire can be taken from the mounting bolt to the rest of the engine?
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Old 17 August 2008, 19:14   #3
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Country: Ireland
Town: Cork
Boat name: Spare Rib
Make: Cobra
Length: 8m +
Engine: Out 250
Join Date: Jul 2008
Posts: 29
Appreciate reply but engine only in contact with rams when in transit, obviously when trimmed down.larger ram lifts engine out of water when not in use and I think this is when the problem arises.
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