The Marksman Repeater is made so poorly that it is not worth repairing. In excellent condition it is worth $15. Broken it is worth nothing. A new model 1010 cost under $20
If you want to pay more than it is worth, look up "Air gun Repair" on the net and find someone near you to rebuild it.
No-one seem to have a diagram on the repeater but I did find this on the web.
See the attached link below
Scroll down to the bottom of the page and you will find photos of how this guy put his back togather.
Crosman does not own Marksman. Crosman made a Repeatairmodel and Marksman made a Repeater model. See the link below for the Marksman Repeater owners manual.
There is No C02 cartridge in the Marksman Repeater, it is spring operated
The Marksman repeater is rated at 200 FPS.
The Marksman 2002 Repeater is rated at 250 FPS.
There have been several models of the marksman repeater. The first one was made in 1955
18 BB according to Marksman
See the Link below for the "you tube" video for Marksman
It is rated at 200 FPS
100
Needs to be serviced/repaired
No way to do it.
See the link below