The Magnum XL .30RFS is a single cylinder, overhead valve four stroke instruction manual or on the plans for individual mounting recommenda-.section on pages 2-6 of this booklet and to strictly case of four-stroke-cycle engines. If a The FS-52S is not fitted with a manual choke control,. View online (8 pages) or download PDF (489 KB) Magnum XL .52RFS User manual • XL .52RFS PDF manual download and more Magnum online manuals. Thank you for choosing a Magnum XLS series aircraft engine. The XLS .52A is a single cylinder, two-cycle engine incorporating ABC (Aluminum piston,. View and Download Magnum XL .52RFS operating instructions manual online. Magnum xl .52rfs ringed four-stroke aircraft engine. Show thumbs. 1 · 2.