Description
Sierra 18-2387 Drain Fill Screw Johnson Evinrude OMC
The Sierra 18-2387 marine lower unit drain/fill screw is a replacement gearcase service component for compatible Johnson, Evinrude, and OMC applications. This screw is used during lower unit gear lube service where Sierra 18-2387, GLM 22420, or the matching OEM-style drain/fill screw is specified.
Key Features
- Sierra 18-2387 marine lower unit drain/fill screw
- Designed for compatible Johnson, Evinrude, and OMC gearcase applications
- Replacement screw for lower unit drain or fill locations where specified
- Interchanges with GLM 22420 where specifications match
- Helps support proper gear lube service and lower unit maintenance
- Component screw only; washer or gasket may be required separately
- Marine replacement part for service, repair, and seasonal maintenance
Fitment
- Brand: Sierra
- Part Number: 18-2387
- Product Type: Lower unit drain/fill screw
- Application Style: Johnson, Evinrude, and OMC
- Interchange Reference: GLM 22420 where applicable
- Use With: Compatible drain/fill plug washer where specified
- Compatible Applications: Marine gearcases where Sierra 18-2387 or the matching OEM drain/fill screw is specified
- Confirm fit by matching Sierra part number 18-2387, GLM 22420 reference, engine or drive model, year, serial range, thread type, screw style, and gearcase application before ordering
Why You Should Buy
- Practical replacement for worn, damaged, stripped, or missing drain/fill screws
- Useful for routine lower unit gear lube changes and gearcase maintenance
- Helps maintain a secure drain/fill screw connection when paired with the correct washer
- Ideal for boat owners, marine repair shops, and seasonal service kits
- Easy to verify by exact Sierra part number and GLM interchange reference
Common Applications
- Johnson outboard lower unit service
- Evinrude outboard gearcase maintenance
- OMC lower unit drain/fill screw replacement
- Marine gear lube change service
- Applications requiring Sierra 18-2387 or GLM 22420 drain/fill screw
FAQ
- What is Sierra 18-2387 used for? Sierra 18-2387 is a lower unit drain/fill screw for compatible Johnson, Evinrude, and OMC marine gearcase applications.
- Does this replace GLM 22420? Yes, Sierra 18-2387 interchanges with GLM 22420 where specifications match.
- Does this include the washer? No, this listing is for the drain/fill screw component only unless otherwise supplied by the seller. A compatible washer or gasket may be required separately.
- Is this for all Johnson and Evinrude outboards? No, compatibility must be confirmed by exact part number, screw style, model, year, serial range, and gearcase application.
- How do I confirm compatibility? Match Sierra part number 18-2387, GLM 22420 reference, thread type, screw style, engine or drive model, serial range, and service manual requirements before ordering.