Detroit Diesel Style 3-Lobe Helical Roots Blower Rotor - Used

Three-lobe helical Roots blower (supercharger) rotor, single-piece steel body with an internal splined bore at one end and an external splined drive stub at the other.

Application: Not verified. The configuration is characteristic of Detroit Diesel two-cycle blower rotors (Series 71 / 92 / 149 families) and of aftermarket Roots supercharger rotor packs, but no manufacturer name, casting number, or part number is legible on the part. Sold by photographs, identifiers, and dimensions. Helix hand (left or right) has not been determined and rotors are supplied in matched LH/RH pairs — please verify before ordering.

Condition: Used, untested take-off (Grade C). Lobes and journals appear intact and undamaged in the photographs, with light handling marks and oil varnish/heat tint staining over part of the body. Not measured, not mic'd, not run-out checked. Single rotor only — no housing, end plates, bearings, seals, gears, or mating rotor included.

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

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.