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Old 27 February 2014, 14:29   #1
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Copper grease

Do you use it on your spark plug threads
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Old 27 February 2014, 14:36   #2
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No. A VERY light smear off grease is all mine get.

Don't use copper grease on your outboard. Ever. You'll have issues with galvanic corrosion if you do.
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Old 27 February 2014, 15:09   #3
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Old 27 February 2014, 15:18   #4
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I don't use it was just reading on pistonheads about it
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Old 27 February 2014, 17:21   #5
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The only thing copper grease should be used on is the backs of brake pads. A very light smear of a marine grease can be used on spark plug threads, however don't over-torque them.
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Old 27 February 2014, 17:45   #6
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Quote:
Originally Posted by spartacus View Post
The only thing copper grease should be used on is the backs of brake pads. A very light smear of a marine grease can be used on spark plug threads, however don't over-torque them.
And even brake pads should not really be applied with copper grease now as it can upset modern abs systems. Can cause fault codes.

I was always taught not to put anything on the plug threads
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Old 28 February 2014, 04:53   #7
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copper grease is more of a automotive rather than a marine grease. I used to use it mainly on exhaust systems when i worked in garages.
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Old 28 February 2014, 04:58   #8
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Please don't ever put copper grease anywhere near aluminium.

If any seawater comes into contact a galvanic cell will be set up with the aluminium becoming anodic to the copper and merrily corroding away.
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Old 28 February 2014, 09:26   #9
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When I was working offshore, we occasionally used something like this: Loctite Nickel Anti-Seize - Henkel
Never tried it on my outboard tho...
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Old 01 March 2014, 03:11   #10
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And even brake pads should not really be applied with copper grease now as it can upset modern abs systems. Can cause fault codes.
Got any more info on that? I use Lockheed red grease on brake rebuilds (floating caliper), lube slider pins, etc. Never had issues with copper grease on the backs of pads. On old school brakes - the majority of ABS issues are down to faulty sensors or broken reluctor rings.
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