steps to add a plate to the transom where the outboard mounts

[bob johnson]

so i have my starcraft down to bare metal on both sides of the transom. there are a series of odd holes down the middle of the transom, that have no purpose i can see. so i am going to add a 15" wide X 12" high 1/4"thick aluminum plate to the trasom to cover all those holes and stiffen the trason where the outboard mounts to it.

I am going to add the plate by glueing with 3M 5200. the plate will have the four holes for the motor mount bolts, and the 1/4" holes for the transom brace.

my question is...should I prime with zinc chromate primers and paint before i glue the board. Or should i glue the board to bare aluminum, then paint afterwards the whole transom???

thanks

bob

 

[Woodonglass]

Re: steps to add a plate to the transom where the outboard mounts

I'd recommend a good Acid wash, wipe down with acetone and Glue it. Do the SE priming after its stuck.

 

[BillP]

Re: steps to add a plate to the transom where the outboard mounts

Don't paint it first, the 5200 will give better corrosion protection than the primer. 5200 will be fine with just a wash and solvent wipe down. Be aware that over the long term 5200 gets rock hard, brittle and can crack/shrink. Long term is 15 yrs in Florida exposure.
bp