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ContinuousWave: Whaler Repairs/Mods
Anti-seize products and Outboards
|Author||Topic: Anti-seize products and Outboards|
posted 02-27-2002 01:47 PM ET (US)
I have read conflicting statements on this forum concerning the use of anti-seize with stainless steel bolts when they are threaded into aluminum. Some people have said to use anti-seize or else you will never get the parts apart and other people have said don't use anti-seize because it causes a galvanic reaction that makes it impossible to remove the bolts. This has bothered me because I have always used anti-seize on my outboards and I have never had a problem.
So, I contacted 2 anti-seize manufacturers and asked them whether or not anti-seize should be used where stainless steel bolts are going into aluminum castings and the whole mess is subjected to salt and fresh water. Both said that copper anti-seize is perfect for this application.
Here was my question to the manufacturers:
Is it ok to use anti-seize on stainless steel bolts that are threaded into aluminum castings on outboard motors. The assemblies are subject to salt water and fresh water.
The following are their responses:
In one word "YES" (although there are some particular situations where a copper-anti-seize with stainless steel can result in di-electric corrosion.
The anti-seizes we make have no problems with saltwater. There is a specific one made for stainless to prevent gauling and reaction. It is called Copper Anti-seize Lubricant part number 09128.
posted 02-27-2002 03:36 PM ET (US)
I pulled the foot bolts out of my new Johnson 25 in 1996, anti-siezed them, re-installed them and have been running in salt since. I put a water pump in about 2 weeks ago (first ever) and everything is fine. That was C-5A copper based.
posted 02-27-2002 03:55 PM ET (US)
I have used "never-seize" for years and have not had any problems. It doesn't look like a copper based product from the color, silver paste...
posted 02-28-2002 02:32 AM ET (US)
I've used regular old Permitex Anti-Seize ever since I replaced the first waterpump in my old 15hp. Evenrude about 15 years ago, never a problem. The first time I dissasembled it I had 1 screw seized and had to have a Heli-Coil installed in that hole. Never a problem after using anti-seize, dissambled 3 or 4 times since using anti-seize, I'm sold on the stuff. Motor spends about 50% in saltwater and 50% in fresh over 20 years.
posted 03-06-2002 11:52 PM ET (US)
Starbrite sells a tube of copper based anti-seize. It works well and is recommended. I would be lost without this stuff on my aluminum Big John downriggers.
posted 05-01-2004 11:00 AM ET (US)
The real answer to anti-seize when two different metals are involved is Nickel Anti-Seize Compound. I think made by www.united-oil-products.com
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