Caution-----When a motor is recovered you MUST get it running ASAP.-----Corrosion of bearings starts as soon as oxygen get at the parts.----Get a shop to help you yesterday!
Are you planning to do any maintenance yourself ?-----Check with shops to see if they work on these older motors.-----The Evinrude in first picture may well be a 79 / 80 model.----Any model numbers for these motors ?
It has a calibrated hole.-----Lets a certain amount of air in.---Order the correct part.----No reason why anybody left it out.-----Perhaps they lost it.
???----These motors have hole in the cylinder wall.-----Bleeds off a bit of compression at cranking speeds.-----So 105 might be normal on one of these.
Changing the driveshaft would be the quick way for me.----If you go that way the replacement shaft and pinion will need to be shimmed.---------Your location ?
Have you checked the shift switch ???----An item found on the MOTOR linkages.----Shuts off spark to 3 cylinders during shifting.----If it is sticky ???
There is no electrical shut off on mine.----Likely stalls / shuts off when you retard throttle.-----Or close fuel valve when you approach the dock.----Let motor run to empty the carburetor.
Was the impeller replaced as part of the work ?----Maybe something is stuck in a reed valve.------Maybe it over heated and then blew the head gasket.-----Maybe the fuel pump diaphragm ruptured.----Easy / economical to replace that diaphragm.---Possibly running on 1 cylinder.-----Does spark jump...