Volvo Penta paint peeling on 2002-2003 DP outdrives?

cobalt252

Seaman
Joined
Jul 24, 2011
Messages
73
I was trying to identify my out drive in a previous post - http://forums.iboats.com/showthread.php?t=529815 - turns out it is a DP-S drive.

I have since learned from the boat manufacturer that Volvo Penta had a paint "peeling" problem with their out drives back in 2002-2003.

cobalt262 (31).jpg cobalt262 (19)2.jpg cobalt262 (20)2.jpg

Does anyone have more information on this? Did VP ever issue a bulletin on the possible cause and how to correct this?

What's the proper way to strip and refinish the (aluminum) drive?
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Volvo Penta paint peeling on 2002-2003 DP outdrives?

I have no clue if there was a bulletin or not, but here is what the manual gives for painting.



1. Remove all marine growth.
2. Remove all loose paint and corrosion by sanding or sandblasting.
If sandblasting, use an aluminum oxide blasting media with a particulate
size of 0.008-0.028 in. (0.2-0.7 mm).
3. Remove all trace of grease and wash with hot water and detergent.
Roughen all painted surfaces with medium 3M ScotchbriteTM
pad. Rinse thoroughly with water.
4. Treat any bare aluminum with chromate conversion coating. Clean
the entire area with an acid cleaner that does not contain fluoride,
such as DuPont? 5717. Scrub the surface with 3M ScotchbriteTM
pad until it is completely “wetted” with no beads of water.
Note! Fluoride in a cleaner causes a “smut” (dark discoloration
on silicon-alloy aluminum castings), and paint will not
stick to “smut”. If this happens, sand the surface and start
over using a different acid cleaner.
Note! Do not use steel wool. Small pieces of steel wool become
embedded in the aluminum and will cause severe corrosion.
5. Rinse thoroughly with water. The area must appear “wetted” or the
surface is not clean, and paint will not adhere.
6. While the surface is still wet from rinsing, treat all bare aluminum
with DuPont? 226S chromate conversion solution. Brush the chromate
solution as required for 2 to 5 minutes to prevent it from drying
on the surface. Rinse the surface thoroughly with water and
allow to air dry. Follow the label instructions exactly.
–If the chromate is allowed to dry anywhere on the bare aluminum
surface, chromic acid salts will form which will prevent
paint adhesion and promote corrosion. Sand the surface to
bare metal.
–It is best to let the part air dry, but if you must wipe the surface
to speed up drying, use lint free wipes not treated with
anything that may contaminate the surface. Do not scrub the
surface, wipe very lightly.
–Do not blow dry with shop air unless it is completely free of
dirt, oil, and water.
–Do not heat the part above 150?F, before painting.
–Do not touch the treated surface with bare bands before
painting.
–The part should be primed soon after it dries, or at least
within 24 hours.
7. Where the prime coat is thin or where the surface is unpainted,
prime with Volvo Penta Primer or PPG? Super Koropon epoxy
primer. Do not apply primer over hard finish coat. Primer solvents
must be allowed time to evaporate and the primer must harden
before applying the finish coat. Allow 8 to 12 hours drying time.
8. Apply finish coat. The parts catalogs list numbers for finishing
products.
 

cobalt252

Seaman
Joined
Jul 24, 2011
Messages
73
Re: Volvo Penta paint peeling on 2002-2003 DP outdrives?

Thanks, Don. That looks doable ...
 
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