26816575A3 Mercury MerCruiser Seal Kit | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Alpha One Gen II Lower Gearcase Seal Kit - Part Number: 26-816575A3

A genuine Quicksilver complete lower-unit seal kit for Mercury MerCruiser Alpha One Gen II sterndrives.

The kit contains the primary seals, O-rings and gaskets required when dismantling and resealing the lower gear housing. It is suitable for propeller-shaft, driveshaft, shift-shaft, bearing-carrier and housing service where the disturbed sealing components must be renewed.

⚙️ Key Features

• Genuine Quicksilver OEM lower-gearcase seal kit

• Correct Mercury part number 26-816575A3

• Designed for Alpha One Gen II sterndrives

• Covers the principal lower-unit sealing locations

• Cross-references with Sierra, GLM, Mallory and NAPA kits

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 26-816575A3 → Supersedes / replaces 26-816575A1

• 26-816575A1 earlier OEM Alpha One Gen II seal-kit reference

• 816575 original OEM seal-kit family reference

OEM / Related Numbers:

• 26-816575A3

• 816575A3

• 26816575A3

• 26-816575A1

• 816575A1

• 816575

Aftermarket / Verified Equivalents:

• Sierra: 18-2646-1

• Sierra: 18-2646

• GLM: 87511

• Mallory: 9-74206

• NAPA Marine: SME1826461

🚤 Compatibility

Commonly used on:

• MerCruiser Alpha One Gen II lower gear housings

• Complete lower-unit rebuild and resealing procedures

Typically suits:

• Drive models:

• MerCruiser Alpha One Gen II - 1991-1995, serial 0D469859 to 0F679999

• MerCruiser Alpha One Gen II - 1996-1997, serial 0F680000 to 0K999999

• MerCruiser Alpha One Gen II - 1998 and above, serial 0L100040 and above

• Standard-rotation Alpha One Gen II lower units

• Counter-rotation Alpha One Gen II lower units where the parts diagram specifies 26-816575A3

• Drive Type: MerCruiser Alpha One Gen II

• System Type: Lower gear-housing seal and gasket kit

• Year Range: 1991 onward, serial-number controlled

🔌 Function

The kit restores the oil and water seals throughout the lower gearcase, allowing the housing to retain gear lubricant and pass pressure and vacuum testing after overhaul.

Common signs of failure:

• Gear lubricant leaking behind the propeller

• Milky or water-contaminated gear oil

• Leakage around the driveshaft or shift shaft

• Lower unit fails pressure or vacuum testing

• Complete gearcase overhaul requires all disturbed seals to be renewed

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging