Sierra Shift Shaft 18-2322, Replaces 62104 and 621041, for Mercruiser I and Alpha I Stern Drives

The Sierra 18-2322 is an aluminum shift shaft engineered for Mercruiser I and Alpha I stern drives. It is a direct replacement for the shift shafts used in these drive units, restoring proper connection between the shift mechanism and the drive so gear engagement operates smoothly and reliably. The shaft is finished in white and machined from aluminum for corrosion resistance and long service life in a marine environment.

Each package includes one shift shaft. Sierra states that this part meets or exceeds the original equipment part it replaces, making it a straightforward like-for-like swap for boat owners and marine technicians servicing Mercruiser I and Alpha I stern drive units. Because the shaft is specific to these drive models, confirming your drive type before ordering ensures correct fitment.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2322
• Material: Aluminum
• Color: White
• Weight: 0.34 pounds
• Package Quantity: 1 shift shaft
• Fitment: Mercruiser I and Alpha I stern drives
• OEM Cross Reference: 62104, 621041
• UPC: 808282257798

Fitment

• Mercruiser I stern drive
• Mercruiser Alpha I stern drive

Replaces (OEM)

• 62104
• 621041

Frequently Asked Questions

What does the Sierra 18-2322 shift shaft fit? The 18-2322 shift shaft is built for Mercruiser I and Alpha I stern drives.

Which OEM part numbers does the 18-2322 replace? It replaces Mercruiser 62104 and 621041.

What is the 18-2322 shift shaft made of? Aluminum, machined and finished in white, is the material used for the Sierra 18-2322 shift shaft.

How much does the 18-2322 shift shaft weigh? 0.34 pounds is the weight of the Sierra 18-2322 shift shaft.

How many shift shafts are included when I order the 18-2322? One shift shaft per package is included with the Sierra 18-2322.

Is the Sierra 18-2322 a genuine Mercruiser part or an aftermarket replacement? It is an aftermarket replacement; Sierra states the 18-2322 meets or exceeds the original equipment part it replaces.

Will the 18-2322 shift shaft work on Mercruiser drives other than I and Alpha I? No, the 18-2322 is designated for Mercruiser I and Alpha I stern drives only, so it should not be assumed to fit other drive models.

Does the 18-2322 shift shaft carry a warranty? Yes, the Sierra 18-2322 shift shaft is covered by a limited warranty.

Is the 18-2322 the same shaft as Mercruiser 62104 or 621041? Functionally yes, the Sierra 18-2322 is designed to replace both Mercruiser 62104 and 621041 shift shafts.

What color is the 18-2322 shift shaft? White is the finish color of the Sierra 18-2322 shift shaft.