New Replacement Sterndrives for Mercruiser Alpha I (1984 - 1991)

New gearcases, upper drive shaft assemblies and complete outdrives for Mercruiser Alpha I stern drives are covered by a one-year manufacturer's warranty.

Click here for 1992 and newer Gen 2 drives.

Be sure to include your year, horsepower, serial number and gear ratio when you place your order.

New Replacement Upper Drive Assemblies for Mercruiser Alpha I Sterndrives

Ratio Part Number Price
1.5 Ratio MC-AU-150-N $1,349
1.65 Ratio MC-AU-165-N $1,349
1.84 Ratio MC-AU-184-N $1,349
1.98 Ratio MC-AU-198-N $1,349

New Replacement Lower Units for Mercruiser Alpha I Drives

Part Number Price
MC-AL-N $1,399

New Complete Outdrives for Mercruiser Alpha I

Ratio Part Number Price
1.50 Ratio MC-AC-150-N $2,675
1.65 Ratio MC-AC-165-N $2,675
1.84 Ratio MC-AC-184-N $2,675
1.98 Ratio MC-AC-198-N $2,675

Service Tips

When replacing only half of your drive, upper or lower, it's important to service the other half to avoid damaging the replacement. The half that's not being replaced should be disassembled, cleaned, inspected and resealed before assembling the outdrive.

All uppers, gearcases and complete outdrives are shipped without oil! Be sure to use the proper oil and filling technique listed in your owner's/service manual.

Complete stern drives will be shipped in two pieces.

New units are assembled with all new parts.

Complete Drive Savings

Complete drive savings only apply when a complete drive is ordered. If both upper and lower units are ordered separately at different times, full individual prices apply, even if they're ordered within a short period of time.

Click here for more Mercruiser sterndrive parts.

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