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Old 17 March 2010, 15:21   #1
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Fixing alloy transom plate?

Hi everyone,
When fitting an alloy transom plate (the type you fasten your engine to), do you use strainless steel screws, or will these react with the alloy?
Cheers,
Geoff
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Old 17 March 2010, 15:41   #2
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Theres not much choice other than to use stainless screws, the trick is to isolate the two using nylon/plastic washers etc. Applying some of this stuff to the contact surfaces also helps a lot.
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Old 17 March 2010, 17:52   #3
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Quote:
Originally Posted by Geoff_Jubb View Post
Hi everyone,
When fitting an alloy transom plate (the type you fasten your engine to), do you use strainless steel screws, or will these react with the alloy?
Cheers,
Geoff
Psssibly with the SIKAFlEX as well ,may isolate the two? has to be done any way to stop salt water geting into the ply transom as you know,but got half a chance rather the useing a corrosive metal nut n bolt,a good wash down in fresh water may prolong the two reacting?just my thought tho Geoff,no expert
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Old 18 March 2010, 05:55   #4
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You will have an aluminium plate, withe stainless through bolt, clamping an aluminium alloy engine bracket anyway, screws are probably the least problem! I used loads of sikaflex and stainless screws and its been fine sofar make sure the anode on the engine is OK
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Old 18 March 2010, 10:00   #5
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Put one of them on a dory with stainless 10-ish years ago, been outside ever since & no problems.

Form me memory the Ally is the more reactive of the two, and is also by far the bigger lump, so from memory the chemistry sorts itself out.

If you are really worried, I have seen nylon versions.
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