23-8M0142859 Mercury MerCruiser Bushing | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Design 1 Shift Shaft Bushing - Part Number: 23-8M0142859

A genuine Quicksilver Design 1 shift shaft bushing used in Mercury V6 and V8 FourStroke gear housing driveshaft assemblies. This bushing supports the shift shaft in modern Mercury 3.4L V6 and 4.6L V8 gear housings, including 4.80 torpedo, 5.44 torpedo and Torque Master gearcase versions where specified.

⚙️ Key Features

• Genuine Quicksilver OEM shift shaft bushing

• Correct Mercury part number 23-8M0142859

• Design 1 shift shaft bushing

• Used on modern Mercury V6 and V8 FourStroke gear housings

• Fits 4.80 torpedo, 5.44 torpedo and Torque Master gearcase applications where specified

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 23-8M0142859 current OEM Design 1 shift shaft bushing reference

OEM / Related Numbers:

• 23-8M0142859

• 8M0142859

• Mercury 23-8M0142859

• Quicksilver 23-8M0142859

• Design 1 shift shaft bushing

• Shift shaft bushing

• 25-8M0142860 related O-ring used in the same shift shaft bushing service family

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Mercury 3.4L V6 FourStroke gear housing driveshaft assemblies

• Mercury 4.6L V8 FourStroke gear housing driveshaft assemblies

• Mercury Pro XS and SeaPro gearcases using Design 1 shift shaft bushing

• Gear housing shift shaft service where 23-8M0142859 is specified

Typically suits:

• Engine models:

• Mercury 175HP 3.4L V6 FourStroke - serial 2B529482 and up, 4.80 torpedo gear housing

• Mercury 175HP 3.4L V6 FourStroke - serial 2B529482 and up, 5.44 torpedo gear housing

• Mercury 175HP 3.4L V6 Pro XS FourStroke - serial 2B529482 and up, 4.80 torpedo gear housing

• Mercury 200HP 3.4L V6 FourStroke - serial 2B529482 and up, 4.80 torpedo gear housing

• Mercury 200HP 3.4L V6 FourStroke - serial 2B529482 and up, 5.44 torpedo gear housing

• Mercury 200HP 3.4L V6 SeaPro FourStroke - serial 2B529482 and up, 4.80 torpedo gear housing

• Mercury 200HP 3.4L V6 SeaPro FourStroke - serial 2B529482 and up, 5.44 torpedo gear housing

• Mercury 200HP 4.6L V8 Pro XS FourStroke - serial 2B529482 and up, 4.80 torpedo gear housing

• Mercury 200HP 4.6L V8 Pro XS FourStroke - serial 2B529482 and up, 5.44 torpedo gear housing

• Mercury 200HP 4.6L V8 Pro XS FourStroke - serial 2B529482 and up, Torque Master gear housing

• Mercury 225HP 3.4L V6 FourStroke - serial 2B529482 and up, 4.80 torpedo gear housing

• Mercury 225HP 3.4L V6 FourStroke - serial 2B529482 and up, 5.44 torpedo gear housing

• Mercury 225HP 4.6L V8 SeaPro FourStroke - serial 2B529482 and up, 5.44 torpedo gear housing

• Mercury 225HP 4.6L V8 Pro XS FourStroke - serial 2B529482 and up, 4.80 torpedo gear housing

• Mercury 225HP 4.6L V8 Pro XS FourStroke - serial 2B529482 and up, 5.44 torpedo gear housing

• Mercury 225HP 4.6L V8 Pro XS FourStroke - serial 2B529482 and up, Torque Master gear housing

• Mercury 250HP 4.6L V8 FourStroke - serial 2B529482 and up, 5.44 torpedo gear housing

• Mercury 250HP 4.6L V8 Pro XS FourStroke - serial 2B529482 and up, 4.80 torpedo gear housing

• Mercury 250HP 4.6L V8 Pro XS FourStroke - serial 2B529482 and up, 5.44 torpedo gear housing

• Mercury 250HP 4.6L V8 Pro XS FourStroke - serial 2B529482 and up, Torque Master gear housing

• Mercury 300HP 4.6L V8 FourStroke - serial 2B529482 and up, 5.44 torpedo gear housing

• Mercury 300HP 4.6L V8 Pro XS FourStroke - serial 2B529482 and up, Torque Master gear housing

• HP Range: commonly 175HP - 300HP where specified

• Engine Type: Mercury 3.4L V6 and 4.6L V8 FourStroke outboard

• System Type: Gear housing shift shaft bushing

• Gearcase Types: 4.80 torpedo, 5.44 torpedo and Torque Master where specified

🔌 Function

The bushing supports the shift shaft inside the gear housing so the shift mechanism remains aligned and can move smoothly between gear positions.

Common signs of failure:

• Loose or sloppy shift shaft movement

• Difficulty selecting forward, neutral or reverse

• Shift shaft bushing worn or seized

• Gearcase service reveals damaged bushing

• Water or corrosion around shift shaft bore

• Replacement required during gear housing rebuild

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging