transom pics
 

here it is .. I also had time to clean the bracket up I used a soda wash mixed with some sand to blast the noocks and crannies .. then I pressure washed for ever.. then let it air dry for a bout an hour, then I used a ppg Alum cleaner and shot with 545 Algrip primer

What did you coat that bracket with?

Bracket
 

I was told that the 545 algrip primer good on all substrates above and below water line...

Forgot to show the part before the burn out oven.. my friend owns a motor rewind shop in town. he let me use his oven to vaporized the rest of the powderecoat.. after it was pulled I blasted with baking soda and sand ...

bracket
 

here it is with a 250 hp motor stator.. the oven is 6' x 6' x h7 '

How hot is the oven? There is a sort of upper limit you want to respect with aluminum in terms of time at temperature. You are probably ok, but it is worth thinking about, as it can reduce the strength of the aluminum.

Yea 10/4... Well we hqve burned out many slum stators ..iron core.. and had good luck... These are pumps qnd motors with flow tollerancea for bearings and shaft alignments... I know that there are set points as to what materials are being burnt... I think he had it set at 800. For 3 hours.... Then u slowly bting temp down... I did not see any warping or cracks... I did spray some crack dye just to check the welds

bracket
 

We will see wen I put her through the paces 4-6 foot chopout saint Andrews passq

it runs suprisingly well... the old 115 pushs it fine for now... scrubbing and replacing the wood leaning post .. trim tabs... may look at transom replacement over the winter before trying to repower.. going to run it for a while and check the burn numbers .. if the old tower of power isnt to bad i may try to stay with it for the classic look.. the original plan was to close the transom... but im not so shure yet..

It's not a stress/warp thing, it's a strength thing. Some aluminum alloys lose a significant portion of their strength when heated near their melting point. You might want to look at the alloy the bracket is made from and find out if annealing it causes it to lose strength. On the other hand, if your friend routinely cooks aluminum in his oven, he may already know the tolerances.
Dave