MerCruiser 9412A18 1547-9105 Alpha One Gen 1 Upper Unit Gearcase Housing Empty Power Steering For #1 drives s/n 3469428

For #1 drives s/n 3469428 and up Except

(3" Across center-to-center for the bolt holes)

985548 / 0985548 - Return Hose

306107 is the part number on this

Induction Manifold: 13545A 1 814033-C1

MerCruiser 9412A18 1547-9105 Alpha One Gen 1 Upper Unit Gearcase Housing Empty Power Steering For #1 drives s/n 3469428Item Description Basically the Upper drive housings are the same no matter what drive engine sterndrive you have from that period of 1983 1990 (I 4, I 6, V8 120hp, 140hp 165hp, 2. 5L, 3. 0L 4. 3L V6 4cyl, 4. 1L 3. 7L 170, 470, 898, 305, 350, etc..) There was a different style of housing from 1983 86ish maybe that was the same internally, but it didn't have the rectangular splash plate. More or less covered in my infographic in the pictures section.