This came out exactly how I planned it , in the upright and lock position the engine still tilt up with no problem , I also add a aluminum support for the back rest, the back rest is locked in place with a wing nut this prevents it from rattling and folding down by itself.
The base is mounted only on two solid stainless hinges I found on ebay it allows the entire seat to tilt or fold forward clearing the splash well completely.
The guy that did my enclosure took a template to make cushions for it we see 200 bucks !

WING NUT AND SUPPORT

Nice mod on the aluminum ..

Sweet hinge ? I can also remove the pin and seat completely

Splash well all clear

Now maybe I will wash the Boat down ..