Learned something new, my mechanic buddy came by used a punch and hammer to flaten screw head and break corrosion loose w hammer vibration
150 hp Optimax, completely rebuilt. Has a significant vibration at 1800 rpm, otherwise runs good !!!
That would be the right hand side, or the one you have labeled #2 in your post
Changing impellars today look what I found
Yes, you should get water out of the top of the motor. Pull the lower off and replace the pump if you don't know the last time it was changed.