Description
SIERRA MerCruiser / OMC / Volvo Long Drive Shaft Yoke – 18-2146
Sierra 18-2146 is the long front drive-shaft yoke that engages the engine coupler on a broad range of MerCruiser, OMC Cobra and Volvo Penta stern drives. It is approximately 9.5 inches long and is associated with driveline assemblies using the applicable internal-clip universal-joint arrangement.
- Long stern-drive input yoke that engages the engine coupler.
- Approximate overall length: 9.5 in (24.1 cm).
- Used across multiple MerCruiser and OMC/Volvo stern-drive driveline families.
- Catalog references include Mercury 814813A3 / 59830-series and OMC/Volvo 3850815.
- Inspect splines, seal surface and universal-joint bores before reuse; drive serial/clip style must match.
For marine drive and engine service parts, fitment can vary by model, serial number, gear ratio, casting and prior service history. Compare the original OEM number and physical configuration before installation, and replace related seals, bearings, locking hardware or cable components when their condition requires it.
Specifications
- Manufacturer: Sierra
- Part Number: 18-2146
- Application: Selected MerCruiser #1, R, MR, Alpha One, Alpha One Gen II, Bravo and Blackhawk drives plus OMC Cobra/Volvo SX-family applications identified by the listed OEM yoke numbers.
- Part Type: Long drive-shaft yoke
- Approximate Length: 24.1 cm (9.5 in)
- System: Stern-drive input driveline
- Function: Couples universal-joint shaft to engine coupler
Interchange / OEM References
- GLM: 28315
- Mallory: 9-72401
- Mercury / MerCruiser: 814813A3, 59830A7, 59830A1
- OMC: 3850815, 912212
- Volvo Penta: 3850815-6

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