Do I need to paint my Volvo saildrive and propeller?

[Bav34]

2001 Volvo with a 120S saildrive / propeller ..... are they aluminium?

I spray my saildrive and prop each year with Blakes Mille antifoul. I must have hit something this year because there was scarring evident on the antifoul of both. I'm guessing something got caught by the prop and spun round a few times before disappearing.

I have just wet and dried the scarring out but have gone back to shiny metal on both.

Can I just spray this over again with a/f or do I have to prime and paint it first? If so, what paint?

Ta.

 

[flyingjunior]

Dont even show it antifoul as you will set up galvanic corrosion due to the disimular metal in the worst instances you will be able to see it fizzing and be able to run your cabin lights off the ensuring electosis. It does sound like you dont have a bronze prop as your prop hasnt fallen off (due to its reaction with the anti foul). Take back any remaining anti foul off both your shaft and prop to check for any pitting and dicouloration being careful around the cutless bearing end also do you have an anode around your prop shaft? if so check as to how much it has fizzed away compared to the rest of the anodes and if you have not got one get one put on before she is relaunched.
Any sign of pitting get a good marine engineer to check it out first.
Hope this helps and Good luck!

 

[pvb]

I'm not sure that flyingjunior understood your question. You do need to prime the bare metal - Blakes do an Underwater Primer which would be OK. Then you can spray it again with Blakes Mille antifoul.

 

[boatmike]

That's wrong.
You can and should put antifoul on saildrive legs but it needs to be an appropriate type. Trilux or similar is appropriate.(don't know the blakes one but it may be) What you should not use is a copper based AF as the leg is in fact aluminium.
The answer to what you should do is
a) rub down the area damaged. Prime with a suitable epoxy primer. Paint with Epoxy, then AF as before.

 

[Dipper]

I agree. For antifoul use an aluminium compatible paint. I was told years ago by a Volvo engineer to also use the aluminium compatible antifoul over the area of the hull immediately around the saildrive as well. Presumably this keeps copper based paints well away from the saildrive and reduces the risk of accidentally splashing the saildrive with such paints.

 

[pvb]

The Blakes Mille antifoul Bav34 has been using is suitable for aluminium outdrives. I believe it's based on zinc oxide.

 

[Graham66]

The original schemes are epoxy/ poly coatings
When recoating alloy it is advisable to use a self etch primer after abrading bare areas, and only apply to BARE areas, do not overlap onto original paint. If the damage is minor you could possibly get away with applying multiple coats (at least five) of Primocon to the damaged area prior to antifouling

 

[VicS]

[ QUOTE ]
Dont even show it antifoul as you will set up galvanic corrosion due to the disimular metal in the worst instances you will be able to see it fizzing and be able to run your cabin lights off the ensuring electosis.

[/ QUOTE ] What rubbish!
Blakes Mille Drive is specifically for sail drives etc. As stated it contains zinc oxide.

International Trilux is also suitable for sail dives and aluminium in general. It contains cuprous thiocyanate.

 

[pvb]

[ QUOTE ]
What rubbish!

[/ QUOTE ]Mmm...that's what I thought too, but I settled for a gentle "I'm not sure that flyingjunior understood your question." Part of my new laid-back approach to these forums!/forums/images/graemlins/grin.gif