This listing is for a New OBR Mercruiser Alpha I Generation II Upper Drive Shaft Assembly, which will fit models from 1991 to 2020 (Please note that Alpha II serial numbers are from OD494569 and forward). New upper drives are assembled with a combination of all new OEM and new aftermarket parts using only high grade American steel for gears and shafts. This item is available in the following Gear Ratios: 1.47, 1.61, 1.81, 1.94, 2.0 and 2.4. When placing an order, please specify gear ratio, number of cylinders, model and serial number. Please use chart below to help identify your model:
Alpha I Generation II Standard Production Models
| ENGINE |
HP |
DISPLACEMENT
LITRE/CID
|
CYLINDERS |
GEAR RATIO |
TOOTH COUNT |
YEAR |
| 3.0L |
130 |
3.0/181 |
4-In-Line |
2.0 |
24-24 |
1998-2020 |
| 3.0L |
130 |
3.0/181 |
4-In-Line |
1.94 |
20-24 |
1991-1997 |
| 4.3L |
175 |
4.3/262 |
V6 |
1.81 |
17-19 |
1991-2020 |
| 5.0L |
230 |
5.0/305 |
V8 |
1.61 |
24-24 |
1991-2020 |
| 5.7L |
260 |
5.7/350 |
V8 |
1.47 |
20-22 |
1991-2020 |
| NA |
NA |
NA |
NA |
2.4 |
20-24 |
1998-2020 |
A Limited One-Year Warranty is included in the order. An additional Twelve-Month Extended Warranty is available. See options and pricing above. Please read the terms of OBR's New and Remanufactured Parts Warranty at https://obparts.com/obr-red-rhino-new-and-remanufactured-parts-warranty/.
