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Catalina/Capri 25/250 Sailor's Forums

General Sailing Forum

Degrading paint on (engine) lower end

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ddlyle
Captain

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302 Posts

Initially Posted - 04/04/2005 : 18:51:21

I bought a new engine in 2002. Runs well and the electric start is nice.
I had some marks on the lower end (from rubbing the dock when leaving the dock when the current was weird) so one day I wondered if I could wash off the marks.

Silly me.
I used what I had in my hand at the time which happened to be a bleach based bathroom cleaner. OOops.

So, the paint "blistered" and now I can see the bare aluminum of the lower end. Crap!! ( I <b> guess</b> it's aluminum.) Maybe I didn't cause it, but I'm sure Suzuki would tell me I did.

I want to make it look nice again.

How would I paint this?
I guess I need to prepare the bare metal.
I do NOT want to take the motor off.
It is on the hard right now so I can prepare and paint it fairly easily.

Any suggestions? Thanks in advance.

Cap'n Dave
Sailing The Blues
1986 C25 sr/sk #5413

Edited by - ddlyle on 04/05/2005 22:38:19

dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 04/04/2005 : 22:11:40

Dave,

I can't see your photos. (You might be the only one who can.)

I refinished the lower unit on my old Johnson, from the expansion part to the skeg, with a little sand paper, primer, and then Johnson white paint and that 22 year old motor looked almost new.

Edited by - on

jm
Captain

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Canada
290 Posts

Response Posted - 04/05/2005 : 14:26:01

go to Suzuki dealer and ask for a spray can of aluminum primer/etch paint - usually it has a light green color to it - and a spray can of whatever color the housing is now. (white, silver, fuscia ?)

Sand the area you need to paint with some 100grit sandpaper to rough it up, wipe it down with a dry tack-cloth to remove all dust etc, mask/paper the transom area so you don't get any residual spray on the fiberglass etc., and spray a few coats of the aluminum primer, let it dry for an hour (usually quick drying stuff), then wet-sand it smooth with some 220 grit, re-prime any area's that are still exposed, dry again, then hit it with a few coats of the housing color spray paint. Assuming it's probably a metallic color/base, you could/should also spray a few coats of clearcoat after the base has dried for half a day.

good as new..

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bobmac
1st Mate

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USA
47 Posts

Response Posted - 04/07/2005 : 15:48:23

sure looks like the PO (I won't say D, incase your it)

put a new paint job on it (gloss black), but failed to prime the aluminum first. Result - aluminum oxidation that doesn't allow the black paint to adhere. I hate to suggest it, but you might want to sand down the entire lower end, prime it with aluminum/oxide primer (as per jm), then apply new black base/clear coats.

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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.