- Brand: Sierra
- Size: 305/350 V8 5.0L
- Color: Black
- Style: 1.62:1 2.00:1 Gear Ratio- 5.0L 305/350 - 24/24
- Condition: New Other
- Notes: New Old Stock Sierra Unit
- SKU: 55820 SDU
- Manufacturer Part Number: 861063A10 815930A15 18-2417
- Country of Manufacture: United States
- Motor & Engine Type: Mercruiser
- Part Type: Motors, Engines & Components
- Other Part Number: N/A
- Surface Finish: Black
- Inventory Number: 55820 SDU
- Website Category: Sterndrive and Jetdrive Parts
- Website Sub Category: Sterndrive Upper Outdrives and Housings
- UPC: N/A
- Shipping: $75.00
Sierra Alpha One Gen 2 Upper Outdrive
Sierra Alpha One Gen 2 aftermarket upper sterndrive unit, fits both 1.62:1 and 2.00:1 gear ratios, 24/24 tooth count. New Old Stock. Pair with a matching Alpha One Gen 2 lower to complete the drive.
Part Numbers
| ▸ | Lead Part Number: Sierra 18-2417 |
| Supersedes: | |
| Mercury 1547-861063A10 | |
| Mercury 1547-815930A15 |
Specs
| ▸ | Gear ratio: 1.62:1 / 2.00:1 |
| ▸ | Tooth count: 24/24 |
| ▸ | Brand: Sierra aftermarket |
Condition
| ▸ | New Old Stock (NOS) unit |
| ▸ | Poorly stored — paint damage will not affect performance |
Fitment
| Models: | MerCruiser Alpha One Gen 2 |
| HP: | 130-230 HP |
Verify by model and serial number before purchase. Contact us if you need help confirming fitment.
Warranty
Southcentral Outboards proudly warranties this upper outdrive for a full 6 months. Coverage applies to gears, bearings, and shafts. If the unit fails within that period, we will repair or replace it. Seals are not covered.
Returns & Disclaimer
If you order incorrectly or change your mind, you may return the item within 45 days with a 20% restocking fee. Buyer pays return shipping. Contact us to facilitate — do not open a return on eBay. All information in this listing is provided to the best of our knowledge but not guaranteed. Fitment is the buyer's responsibility — please verify by model and serial number before purchasing, and contact us if you are unsure.
Southcentral Outboards
Altamont, IL
