Zenoah K700013042 3x42 O-Ring Seal - G290PUM Spare  [K700013042]

Fit and cross-reference for 3x42 o-ring

This Zenoah K700013042 O-ring is a small rubber replacement seal supplied for use in RC components and routine maintenance tasks. The item is provided as an individual 3x42 ring intended to restore sealing where that dimension is required.

To fit the o-ring, clear the groove of dirt and old residue, place the ring flat into the groove without twisting, and reassemble so the seal compresses evenly. The part simply restores proper sealing and does not itself modify engine performance.

Handling guidance: protect the o-ring from solvents and extended UV exposure, store flat at typical room temperatures, and discard any ring with cracks or permanent deformation. Check component references if you need to cross-reference the 3x42 size for compatibility.