Genuine O.S. MAX water-cooling parts set, part number 21040002. The original package identifies this set for the O.S. MAX-10 R/C engine, with a marine conversion instruction insert included.

• Brand: O.S. Engines
• Part number: 21040002
• Application: O.S. MAX-10 R/C
• Type: Water-cooling / marine conversion parts
• Includes the pictured metal cooling assembly, gaskets, metal ring, and instruction insert

Original packaging shows age and shelf wear, including creasing, discoloration, and handwritten pricing. Please review both photos for condition and included components.

Verify compatibility with your engine before purchasing. Only the pictured contents are included; completeness has not been verified against the original parts list.