Thanks a lot Steve for the information.
I ve mailed to Douglas Penn,but he is now retired from outboard parts:)
It seems rubber can be as new ( and still reliable years after ) by soaking in brake fluid.
So i try first this.
3.99 for DOT 4, and 25 $ + shipping for an unknow rotor 😛
Guess my choice..
This motor will run, of course.
My goal is to sell it and find a 1927 / 30.
Won t make money. for sure 😛