448m0140440 Mercury MerCruiser Propeller shaft | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Right-Hand Propeller Shaft - Part Number: 44-8M0140440

A genuine Quicksilver right-hand propeller shaft used in selected MerCruiser Alpha sterndrives and Mercury / Mariner high-horsepower outboard gearcase applications. This shaft transfers drive from the gearset through to the propeller and is a critical lower-unit component for correct propulsion, propeller alignment and gearcase reliability.

⚙️ Key Features

• Genuine Quicksilver OEM propeller shaft

• Correct Mercury part number 44-8M0140440

• Right-hand / standard rotation shaft application

• Used on selected MerCruiser MC-I, R, MR, Alpha One and Alpha One Gen II applications

• Also used on selected Mercury / Mariner 2.5L and 3.0L high-output outboard gearcases

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 44-8M0140440 → Supersedes 44-824110

• 824110 earlier OEM reference

OEM / Related Numbers:

• 44-8M0140440

• 8M0140440

• 44-824110

• 824110

• 55857

• 66060

• 660602

• 660603

Aftermarket / Verified Equivalents:

• Sierra: 18-2166

• GLM: 11150

• Mallory: 9-72450

• WSM: 449-120

🚤 Compatibility

Commonly used on:

• MerCruiser Alpha sterndrive right-hand propeller shaft applications

• Mercury / Mariner high-horsepower outboard gearcases using 44-8M0140440

Typically suits:

• Engine / drive models:

• MerCruiser R / MR / Alpha One sterndrive, 1983-1990 - serial 6225577 to 0F386995

• MerCruiser R / MR / Alpha One transom assembly, 1983-1990 - serial 6216687 to 0F386995

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

• Mercury Jet Pump 3.0L DFI - serial 0T997974 to 1E003045

• Mercury 200HP DTS 6-cylinder 3.0L - serial 0T980000 to 1B417701

• Mercury 200HP 3.0L EFI SeaPro - serial 0T409000 to 0T800999

• Mercury 200HP 6-cylinder 2.5L / 3.0L gearcase applications using standard rotation propeller shaft 44-8M0140440

• Mercury 225HP DTS 6-cylinder 3.0L - serial 0T599000 to 1B417701

• Mercury 225HP 3.0L EFI standard rotation gearcase applications using 44-8M0140440

• Mercury 250HP 3.0L EFI standard rotation gearcase applications using 44-8M0140440

• Mercury 250XS 3.0L standard rotation gearcase applications using 44-8M0140440

• Mercury 300X / 300 Pro Max 3.0L standard rotation gearcase applications using 44-8M0140440

• HP Range: commonly used across 200HP - 300HP outboard applications, plus Alpha sterndrive applications

• Engine / Drive Type: MerCruiser Alpha sterndrive and Mercury / Mariner 2.5L / 3.0L outboard gearcase

• Rotation: Right-hand / standard rotation

🔌 Function

The propeller shaft transfers gearcase output to the propeller and supports correct propeller rotation, thrust loading and lower-unit operation.

Common signs of failure:

• Bent or damaged shaft causing propeller wobble

• Gear oil leakage from propeller shaft seals

• Vibration under load

• Damaged splines or propeller hub engagement issues

• Lower-unit noise caused by shaft or bearing misalignment

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging