Sierra Thrust Bearing 18-1363 for Evinrude Outboard Gearcases

The Sierra Thrust Bearing 18-1363 is a replacement gearcase bearing designed for Evinrude outboard motors. Thrust bearings absorb the axial load generated by the propeller shaft as it pushes against the gearcase during operation, keeping the shaft properly positioned and preventing excessive wear on surrounding gearcase components. As the gearcase turns power from the drive shaft into thrust at the propeller, this bearing manages the forward and reverse loading that would otherwise be transferred directly into the housing.

This part is built to the same fit and function as the original equipment it replaces, making it a straightforward drop-in choice when servicing or rebuilding an Evinrude outboard gearcase. Because thrust bearings see continuous load whenever the engine is in gear, they are a common wear item to inspect and replace during a gearcase overhaul, especially if you're already into the lower unit for a seal, bearing carrier, or gear set replacement.

The Sierra Thrust Bearing 18-1363 is compact and lightweight at 0.04 pounds, consistent with its role as a small internal gearcase component rather than an externally visible part.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-1363
• Product Type: Thrust Bearing
• Application: Evinrude outboard gearcase
• UPC: 808282243142
• Weight: 0.04 pounds

Frequently Asked Questions

What does the Sierra 18-1363 thrust bearing do inside an outboard gearcase? It absorbs the axial (forward and reverse) load from the propeller shaft, keeping the shaft aligned and preventing that load from wearing directly on the gearcase housing. The Sierra Thrust Bearing 18-1363 is fitted into the gearcase to handle this thrust load.

Is the Sierra 18-1363 a genuine Sierra part or aftermarket? 18-1363 is Sierra's own part number for this thrust bearing, so it is sold as a genuine Sierra replacement part rather than a third-party aftermarket copy.

How much does the Sierra 18-1363 thrust bearing weigh? The Sierra Thrust Bearing 18-1363 weighs 0.04 pounds, reflecting its size as a small internal gearcase bearing.

What outboard brand is the 18-1363 thrust bearing designed for? This thrust bearing is designed for Evinrude outboard gearcases, part number 18-1363.

When should a thrust bearing like the 18-1363 be replaced? A thrust bearing typically warrants replacement any time a gearcase is opened for service and the bearing shows wear, pitting, or play, since it carries continuous load whenever the outboard is in gear. Many owners replace the 18-1363 proactively during a full gearcase rebuild.

Can I install the Sierra 18-1363 thrust bearing myself? Installing a gearcase thrust bearing requires disassembling the lower unit to access the propeller shaft and bearing carrier, so it is best done by someone comfortable with outboard gearcase service or a qualified marine mechanic.

Does the Sierra 18-1363 come with installation hardware or seals? The 18-1363 is the thrust bearing itself; the dossier does not list additional seals or hardware bundled with this part number.

What UPC is associated with the Sierra 18-1363 thrust bearing? The Sierra Thrust Bearing 18-1363 carries UPC 808282243142.

Why would my outboard need a new thrust bearing? Worn thrust bearings can allow excess play in the propeller shaft, leading to noise, vibration, or accelerated wear on other gearcase parts, which is why the 18-1363 is a common inspection point during gearcase service on Evinrude outboards.

Is 18-1363 the correct part number to search for this bearing? Yes, 18-1363 is the Sierra part number to reference when ordering this specific Evinrude outboard gearcase thrust bearing.