Description
SIERRA Mercury / OMC Drive Shaft Pinion Nut, 5/8-18 – 18-3719
Sierra 18-3719 is a Drive shaft / pinion nut engineered for the specified marine application. Selected Mercury Marine and OMC gearcases using the listed 5/8-18 drive-shaft/pinion nut references.
- Pinion/drive-shaft nut for specified Mercury and OMC lower-unit gearcases.
- 5/8-18 thread specification.
- 1-1/16-inch wrench size according to the source product data.
- Cross-references OMC 314730 and Mercury 11-35921 / 11-47411 / 11-826375 and related references.
- Use the manufacturer’s pinion-nut torque and locking procedure; incorrect preload/retention can cause major gearcase damage.
Fitment for marine engine and drive service parts can vary by model, serial number, gearcase, cooling configuration and prior component supersessions. Compare the original OEM number and physical configuration before installation, and renew related seals, locking hardware or adjacent wear items when their condition requires it.
Specifications
- Manufacturer: Sierra
- Part Number: 18-3719
- Part Type: Drive shaft / pinion nut
- Application: Selected Mercury Marine and OMC gearcases using the listed 5/8-18 drive-shaft/pinion nut references.
- Thread: 5/8-18
- Wrench Size: 1-1/16 in
Interchange / OEM References
- OMC Stern Drive: 314730
- Mercury Marine: 11-35921, 11-47411, 11-826375, 826375
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