Re: 1955 Evinrude 25hp Big Twin No Start

[Don]

Yeah, I would be concerned about those low compression numbers, would try a different gage just to ensure you are getting accurate readings.
Are you sure you have the plug wires on correctly? Popping through the exhaust often means the plug wires are backwards….
I don’t know if this engine has an access cover on the flywheel, if it does you can have a peek at the coils to see if they are messed up…
You mentioned fuel spilling from the front of the carb, make sure it is not flooding over causing a no start condition…