Onan Water-Cooled Exhaust Manifold With Integral Coolant Tank - Used

Onan cast-iron water-cooled exhaust manifold with integral coolant chamber and pressure filler cap, removed from service. **Application:** Onan / Onan-Cummins diesel generator set (marine or industrial) — the casting carries the cast "Onan" name and the factory hot-pressurized-coolant warning decal. Specific genset model and OEM part number are not legible on this unit and are not verified, so it is offered by photographs, identifiers, and dimensions only. Features an 8-bolt machined head flange, flanged exhaust outlet, two cast coolant hose nipples, and an installed pressure cap. **Condition:** used, untested take-off — complete in appearance with worn paint, surface rust, and old gasket residue; not pressure-tested or flow-tested. Plan on cleaning/descaling, a pressure test, and new gaskets before installation. Drained and ports capped before shipping. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.