CAT Caterpillar 127-8228 Mechanical Unit Fuel Injector for 3114 3116 3126 - Untested

Caterpillar mechanical unit injector (MUI), factory-stamped 127-8228 with the CAT logo on the body.

Application: CAT 127-8xxx series mechanical unit injectors are associated with the Caterpillar 3114 / 3116 / 3126 engine family (industrial, truck, and marine variants). The specific application for this unit is not verified. Injectors in this family are calibration-specific and similar-looking numbers are not automatically interchangeable, so the engine serial and arrangement number must be checked before ordering.

Condition: Untested. The injector is complete as pictured and presents clean — bright machined surfaces, carbon-free nozzle tip, O-rings in place, spring/follower and rack linkage intact, with light heat discoloration on the spring. No packaging, reman tag, or bench-test documentation is present, so it is not offered as new, rebuilt, or tested. We recommend a bench pop/leak-off test by a qualified diesel injection shop before installation.

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.

Quote is subject to final fitment confirmation by engine/transmission serial number, part number, photos, and supplier availability.