2643035A4 Mercury MerCruiser Seal Kit | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Lower Unit Gearcase Seal Kit - Part Number: 26-43035A4

Genuine Quicksilver gearcase seal kit used on Mercury and Mariner 40HP to 125HP lower units. This kit is used for complete lower-unit reseal service on selected 40-60HP BigFoot, 75-90HP 3-cylinder and 100-125HP 4-cylinder outboards where the gearcase matches the 26-43035A4 seal kit family.

⚙️ Key Features

• Genuine Quicksilver OEM lower-unit seal kit

• Correct Mercury part number 26-43035A4

• Supersedes earlier 26-43035A3 / A2 / A1 seal kit references

• Used for gearcase reseal service

• Covers prop shaft, driveshaft and shift shaft sealing components in supported gearcases

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 26-43035A4 current OEM seal kit reference

• 26-43035A3 earlier related seal kit reference

• 26-43035A2 earlier related seal kit reference

• 26-43035A1 earlier seal kit reference

OEM / Related Numbers:

• 26-43035A4

• 43035A4

• 2643035A4

• 26-43035A3

• 43035A3

• 26-43035A2

• 26-43035A1

• Lower-unit seal kit

• Gearcase seal kit

Aftermarket / Verified Equivalents:

• Sierra: 18-2626

• Recmar lower-unit seal kit equivalents for 26-43035A4 applications

• WSM gearcase seal kit equivalents for Mercury / Mariner 40HP to 125HP applications

• Aftermarket 26-43035A4 seal kits for 40-60HP BigFoot, 75-90HP and 100-125HP gearcases

🚤 Compatibility

Commonly used on:

• Mercury / Mariner 40HP to 60HP BigFoot gearcases

• Mercury / Mariner 75HP to 90HP 3-cylinder gearcases

• Mercury / Mariner 100HP to 125HP 4-cylinder gearcases

• Lower-unit reseal work after water intrusion or pressure test failure

Typically suits:

• Engine models:

• Mercury / Mariner 40HP to 60HP 2-stroke BigFoot - 1988-2016 where gearcase uses kit 26-43035A4

• Mercury / Mariner 40HP to 60HP 4-stroke BigFoot - 1988-2016 where specified

• Mercury / Mariner 75HP 3-cylinder 2-stroke / 4-stroke - 1988-2016 where specified

• Mercury / Mariner 80HP 3-cylinder applications where specified

• Mercury / Mariner 90HP 3-cylinder 2-stroke / 4-stroke - 1988-2016 where specified

• Mercury / Mariner 100HP 4-cylinder applications where specified

• Mercury / Mariner 115HP 4-cylinder 2-stroke / 4-stroke - 1988-2016 where specified

• Mercury / Mariner 125HP 4-cylinder applications where specified

• Mercury / Mariner 100HP / 115HP / 125HP 2-cycle outboards - USA serial 0B209468 and newer where specified

• Belgium-built 100HP / 115HP / 125HP applications - serial 9523034 and matching gearcase families where specified

• HP Range: commonly 40HP - 125HP where specified

• Engine Type: Mercury / Mariner outboard gearcase

• System Type: Lower-unit / gearcase seal kit

🔌 Function

The seal kit restores the lower-unit sealing system, keeping gear oil in and water out around prop shaft, driveshaft and shift shaft seal areas.

Common signs of failure:

• Milky gear oil

• Gear oil leaking from prop shaft or driveshaft area

• Failed lower-unit pressure or vacuum test

• Fishing line damage behind propeller

• Lower unit opened for bearing or gear service

• Complete reseal required after water intrusion

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging