just started to take a closer look at the Engine I brought home last week, the label at the bracket says E75ERCIM wich makes it an 75hp from -81.

Is there a way to make sure it is a 75hp? other than to take the head off...
I tried to take a peek inside the top cylinder but could not see any chamfer over the exhaust port, only had a tiny mirror and an LED so I might be mistaken.

Got some numbers on different stuff if it might help.

Block: (just behind the ignition parts) 385031

head: (Just by the upper attachment Point for the ignition bracket) F 319335

Core plug (under lifting Eye) 70673D B04846

Flapper type choke carbs marked: (body) 326951 (float bowl) 313355

Got a bad gut feeling about this, the powerhead seems untouched (still original paint on all screw heads) but ignition and fuel seems to be removed and attached and so seems the bolts that holds the powerhead...