Generally, ejection problems in the 39A are caused either by accumulated gunk, or by a weakened or broken ejector spring.
Clean the gun, first. If that doesn't fix the ejection problem, then replace the ejector spring. It is easy to replace, as it's held in with a screw.
The spring is Marlin part number 402095 and is available from www.brownells.com as their part number 550-402-095, priced at $2.73.
Your marlin model 39a golden was made by marlin in 1964.
The L prefix to your marlin model 39A indicates that it was made by marlin in 1954.
your marlin 39A was made in 1965.
Your marlin model 39a was made in 1965.
The marlin model 39A is the rifle model,while the Marlin model 39M is the carbine model.
my marlin 39a 18496b
The AC prefix indicates that your marlin model 39A golden was made by marlin in 1967.
The typical Marlin 39A does not have a scope. They are drilled and tapped that one can be added.
The S prefix dates your marlin model 39a to the years 1958-1959.
The AC prefix dates your marlin model 39A to the year 1967.
Your marlin model 39A was made by the marlin firearms company in 1952.
YOUR 39A WAS MFG. IN 1963