Sierra 18-1365 Thrust Bearing - Replaces OMC/Evinrude/Johnson 387656, 383248, GLM 16330

The Sierra 18-1365 Thrust Bearing is a gearcase thrust bearing built to meet or exceed the specifications of the original equipment part it replaces. It is designed as a direct interchange for outboard gearcase applications that call for GLM 16330 or Evinrude/Johnson/OMC 387656 and 383248, giving boat owners and repair shops a reliable aftermarket option when servicing the lower unit. The bearing is compact, measuring 0.39 x 0.39 x 0.39 inches, and is intended to be packed with marine grease before installation to support proper lubrication and load distribution during operation.

As a thrust bearing, its job is to absorb axial (thrust) loads within the gearcase, keeping rotating components properly positioned under the forces generated by propeller thrust and gear engagement. Each Sierra 18-1365 unit is manufactured to consistent quality standards so it installs and performs like the original equipment bearing it is replacing. It ships as a single bearing (unit count of 1), making it a straightforward part to keep on hand for gearcase rebuilds or as a stocked spare.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-1365
• Product Type: Thrust Bearing
• Dimensions: 0.39 x 0.39 x 0.39 inches
• Weight: 0.05 pounds
• Compatible Lubricant: Grease
• Unit Count: 1
• OEM Cross-Reference: GLM 16330, Evinrude/Johnson 387656, 383248, OMC 387656

Fitment

Designed for use in outboard gearcase applications that specify GLM 16330 or Evinrude/Johnson/OMC 387656 and 383248 thrust bearings. Confirm your existing bearing number before ordering.

Replaces (OEM)

• GLM 16330
• Evinrude/Johnson 387656
• 383248
• OMC 387656

Frequently Asked Questions

What is the Sierra 18-1365 used for? It is a thrust bearing used inside an outboard gearcase to absorb axial thrust loads from the propeller shaft and gear set, keeping the rotating assembly properly positioned during operation.

Is the Sierra 18-1365 a direct replacement for my OEM bearing? Yes, the 18-1365 is interchangeable with GLM 16330 and Evinrude/Johnson/OMC 387656 and 383248, so it can be used as a direct replacement for gearcases originally fitted with any of those bearing numbers.

What size is the Sierra 18-1365 thrust bearing? The 18-1365 measures 0.39 x 0.39 x 0.39 inches and weighs 0.05 pounds.

Does the 18-1365 come pre-greased or do I need to add lubricant? The Sierra 18-1365 thrust bearing is compatible with grease lubrication; it should be packed with marine grease during installation per standard gearcase rebuild practice.

How many bearings come in a Sierra 18-1365 package? Each package contains one Sierra 18-1365 thrust bearing (unit count of 1).

Will Sierra 18-1365 meet the same quality as the original OMC or Evinrude bearing? The 18-1365 is manufactured to meet or exceed the quality of the original equipment part it replaces, including OMC and Evinrude/Johnson 387656 and 383248 applications.

Is GLM 16330 the same bearing as Sierra 18-1365? GLM 16330 is one of the cross-reference numbers for the Sierra 18-1365, meaning the two are interchangeable for the same gearcase application.

Can the Sierra 18-1365 be used for a gearcase rebuild? Yes, the 18-1365 thrust bearing is commonly installed during gearcase rebuilds anywhere the original GLM 16330 or OMC/Evinrude 387656 or 383248 bearing is specified.

How do I know if I need the 18-1365 thrust bearing instead of another Sierra bearing? Check the bearing number stamped on your existing part or your gearcase parts diagram; the 18-1365 is the correct replacement specifically for applications listing GLM 16330 or Evinrude/Johnson/OMC 387656 and 383248.

Is the Sierra 18-1365 an aftermarket or genuine OEM part? The 18-1365 is a Sierra aftermarket thrust bearing engineered to meet or exceed OEM specifications for the OMC, Evinrude, and Johnson bearings it cross-references.