The cartridge lifter wouldn't stay up and allow rounds to be fed into chamber.
Seen discovered why. The lifter has a small spring loaded detent, (See Photos) which holds it up, mine was missing not to be found.
Now! Marlin doesn't supply this part separate you have to buy the complete lifter costing £60 from http://www.marlinspares.com (Great service BTW).
Don't imagine it would be hard for somebody with a Lathe to turn them out, it is held in place with a crimped washer, if it had a groove it could be retained with a E clip.
Don't know if other Marlin models have a similar arrangement.
Would be a good money spinner for somebody to turn them out.


[img[