So that possibly explains why the vent was soldered
shut and this hole was punched in the rear of this tank.
Slim60 does the motor your working on have the
accessory tilt bracket. If not possibly the motor that
tank originally came from did. Mysteries we may never
be able to answer but we can speculate.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.