Topics: 6April 6, 2015 at 2:42 pm #1117
I have a 1925 Johnson A-25 that someone had painted over the plating on the lower unit. Does anyone have any recommendations on how to remove it or what not to do? My son had pulled a drain plug and scraped off the paint with his fingernail and was surprised how good of condition it was in. I’m just trying to be cautious before proceeding.
Thank You for your time,
JasonApril 6, 2015 at 3:03 pm #13412
It is probably oil-based paint, so any solvent for that would work.
Start light with mineral spirits and work your way up to acetone. I will try and write up a more complete walk-through later
Topics: 6April 6, 2015 at 8:17 pm #13422
Thanks, I didn’t even think to start off with mineral spirits, duh.April 6, 2015 at 8:44 pm #13424
Ok, here is the majority of an email from my dad. We were talking about me removing a later white top coat from the original sea green paint on a 3.3HP Johnson.
Now, Dad and I were talking about what would be gentle enough to attack the binder in the oil-based paint of the newer white paint, but not too harsh to attack the older binder in the green paint. You don’t really have to worry about that as you have a nickel finish as the original.
You can start with mineral spirits, but I’d probably head straight for the acetone. If there is any sort of original decal or original paint underneath, you might want to read through this a couple times and see what you can apply.
Good luck, and show us some before and after pics!quote :
Indian Group Leader
US Member - 2 Years
Topics: 8April 7, 2015 at 12:38 am #13446
Is it just me, or does anyone else know that the lower unit of a Johnson A-25 is not nickel plated? I believe it is aluminum and may have been polished at one time, but I have never heard of nickel plating aluminum. TomApril 7, 2015 at 12:52 am #13447
Aluminum can be plated with nickel. It’s not as easy as some other metals, but it can be done. Have to add a zinc coating before the aluminum is exposed to oxygen to prevent aluminum oxide, but it can be done.
Topics: 6April 7, 2015 at 1:29 am #13449
Some folks refer to a lower unit as being from the transom bracket down.
The driveshaft casing, (also refered to as the tower or mid section) in my experience
on an A-25 is nickel plated.
The gear case, ( also refered to as lower unit or gear foot ) in my experience is polished
aluminum, (not plated ) At least they are on my two A-25’s.
As far as removing paint without disturbing the nickel plating,
I personally have had sucess soaking the part in just plain old gasoline.
Everyone’s got a flavor that works for them.
Brook E. Newcomb
Evinrude Rowboat Motor
Special Interest Group
US Member - 1 Year
Topics: 37April 7, 2015 at 2:30 am #13456
The 25 I’m working on had the nickel plating on the cylinders, brass driveshaft, copper water lines and the brass water pump that sits on the aluminum gear casing . I didn’t see any plating on the gear casing unless it wore off like most of the other items mentioned. Depends on what type of restoration your trying to achieve. I chose to remove all the plating and shine the metal up. Others clean them up best they can to keep them more original.
- You must be logged in to reply to this topic.