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Old 18 August 2014, 10:17   #11
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Country: UK - England
Boat name: Hysucat
Make: Hysucat
Length: 8m +
Engine: Twin Suzuki 175's
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Ouch, that shite. I lubed mine with copperslip from new. Not sure what you can do now given the position in the swingarm, its not like you can get a drill in there to tap it for an extractor stud.

Before you spend loads of money and time, see how much a secondhand swing arm is first. You never know, it may be quicker and cheaper than trying to sort it.

What bike is it?

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Old 18 August 2014, 10:44   #12
Country: UK - England
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Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 10hp Yam / 150hp opt
Join Date: Sep 2003
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1. If it's under warranty - get on to the supplier.

2. Teff gel is what's often used when assembling components onto an aluminium mast with stainless steel fastenings.

3. Copper grease in a marine environment will be more noble than aluminium - meaning that the aluminium will corrode in preference to the copper. Which should prevent seizing - but will probably weaken the connection leading to a whole other level of trouble!

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Old 18 August 2014, 12:50   #13
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Boat name: cariboo too
Make: WB Generation 430
Length: 4m +
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Originally Posted by jyasaki View Post
Seems to me that a lot of auto/truck engines these days are aluminum, and I haven't heard of anyone using aluminum hardware to bolt them up - it's all steel hardware. So why is the issue you referenced not still a problem? Worded differently, why was it a problem in that instance?

No idea, but, as someone else mentioned, direct contact between such dissimilar metals was always a problem. As for nowadays, perhaps the surface treatments are more advanced. Perhaps they sleeve the bolt holes. Perhaps they are machined to a much more accurate tolerance. Perhaps it's a combination of several factors
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Old 18 August 2014, 14:26   #14
Country: USA
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Regular (non-stainless) steel and aluminum have very close galvanic numbers. In atmospheric environment would mean virtually no galvanic corrosion. Stainless is much more noble than aluminum and will corrode aluminum especially in marine salt water environment.
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Old 21 August 2014, 19:08   #15
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Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
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Stainless bolts into alloy seizing

Graphite dust is a good thread lubricant for stopping Galling on stainless threads .
Other dry lubricants or dust such as Mica or even french chalk is supposed to be ok too though i have only ever used Graphite .

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