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Old 18 July 2013, 06:01   #1
paddlers's Avatar
Country: UK - England
Town: Sticks, N.Yorks
Boat name: Tamanco
Make: Honwave 3.5AE
Length: 3m +
Engine: Tohatsu Outboard
Join Date: May 2012
Posts: 1,066
Copperease or grease ?

Just replacing the thermostats on my 1990 V6 and typically one of the four bolts was a bit of a terwat to get out with a white fluffy powder coating the threads !
Cleaned the bolt & threaded hole out thoroughly and if it was on the car would give it a smear of copperease on reassembly but having read about galvanic corrosion on some of the posts wondered if waterproof grease was a better option? I reassembled the gearbox after fitting the impeller with grease as it's in the salty stuff but wouldn't expect much at the top of the engine.
Any thoughts appreciated.

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Old 18 July 2013, 07:42   #2
Country: UK - Wales
Town: Here
Boat name: doggypaddle
Make: Avon 5.4 Searider
Length: 5m +
Engine: yamaha 80
Join Date: Jul 2007
Posts: 1,107
ACF50 corrosion block always seems to work for me.

I am usually not as green as i am cabbage looking.
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Old 18 July 2013, 08:06   #3
m chappelow's Avatar
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
Waterproof grease is the better option or graphite dust for the bolts but I wouldn't use any copper based products on an outboard especially below the waterline .
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