Description
SIERRA Volvo Penta / OMC Cobra SX Gear Housing Seal Kit – 18-2598
Sierra 18-2598 is a Gear housing seal kit engineered for the specified marine application. Volvo Penta SX and OMC Cobra SX sterndrives through 2006 using OEM gearcase seal kit 3855275 / 0778351.
- Lower gear-housing seal kit for Volvo Penta SX and OMC Cobra SX stern drives.
- Sierra source application: Volvo SX through 2006.
- Crosses to Volvo Penta/OMC 3855275 and 0778351 references.
- Provides the dedicated sealing components needed when the lower gear housing is opened for service.
- Pressure/vacuum test the gearcase after resealing and before filling with gear lubricant.
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, hoses or cable components when their condition requires it.
Specifications
- Manufacturer: Sierra
- Part Number: 18-2598
- Part Type: Gear housing seal kit
- Application: Volvo Penta SX and OMC Cobra SX sterndrives through 2006 using OEM gearcase seal kit 3855275 / 0778351.
- Drive Family: Volvo Penta SX / OMC Cobra SX
- Model Coverage: Through 2006
Interchange / OEM References
- Volvo Penta: 3855275, 0778351
- GLM: 87750


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