Water Jacket O-Ring 3x40 for G231PUM & G260PUM - Zenoah K700013040  [K700013040]

Seal replacement for engine cooling jacket

This replacement O-ring is made for the water jacket on Zenoah small gas engines and restores the cooling seal. It conforms to the 3x40 dimension shown in the name and is supplied without additional packing.

Use the O-ring when servicing cooling passages on compatible Zenoah models, and inspect the water jacket bore and the mating faces for grit or scoring before fitting. A properly seated ring on a clean surface offers better resistance to leaks and helps maintain consistent cooling.

Fit notes: remove all old sealing residue, check the groove for sharp edges, apply a light lubricant compatible with engine seals to ease installation if necessary, and confirm the ring sits uniformly around the jacket before reassembly.