1545691A1 Mercury MerCruiser Shim Assembly | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Driveshaft Bearing Cup Shim Set - Part Number: 15-45691A1

A genuine Quicksilver shim set used between the driveshaft bearing cup and gear housing in MerCruiser stern drive gear housing assemblies. This shim set is used to establish correct bearing cup height and gearcase setup during gear housing repair or rebuild.

⚙️ Key Features

• Genuine Quicksilver OEM shim set

• Correct Mercury part number 15-45691A1

• Used between driveshaft bearing cup and gear housing

• Supports correct gear housing bearing setup

• Cross-references with Sierra 18-2283 and GLM 23260 for matched MerCruiser applications

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 15-45691A1 current OEM shim set reference

OEM / Related Numbers:

• 15-45691A1

• 45691A1

• 1545691A1

• 31-61100A1 related driveshaft bearing assembly

• 31-32575T1 related bearing assembly

• 15-32563A1 related shim set for alternate bearing configuration

• 15-35980A1 related shim set

• 15-36178A1 related shim set

• 15-97166 related thrust washer to gear housing shim kit

• 45-55796 related driveshaft

• 25-32546 related O-ring

Aftermarket / Verified Equivalents:

• Sierra: 18-2283

• GLM: 23260

• Aftermarket shim kit equivalent for 15-45691A1 drive shaft bearing cup applications

🚤 Compatibility

Commonly used on:

• MerCruiser stern drive gear housing assemblies

• MerCruiser drive shaft bearing cup to gear housing shim locations

• MerCruiser R / MR / Alpha One drive shaft housing service applications where 15-45691A1 is specified

Typically suits:

• Drive / engine models:

• MerCruiser Model 90 Renault 96 I/L4 1970-1972 - serial 2851424 to 3226957, gear housing assembly - drive

• MerCruiser MC-1 / #1 stern drive gear housing assemblies where 15-45691A1 is specified

• MerCruiser R drive gear housing assemblies where the driveshaft bearing cup shim set specifies 15-45691A1

• MerCruiser MR drive gear housing assemblies where the driveshaft bearing cup shim set specifies 15-45691A1

• MerCruiser Alpha One Gen I drive shaft housing assemblies - serial range 6225577 to 0D469858 where 15-45691A1 is specified

• MerCruiser Alpha One SS driveshaft housing assembly where shim 15-45691A1 is shown in the top bearing / driveshaft housing stack

• MerCruiser R / MR / Alpha drive shaft housing service kits using bearing 31-61100A1 and shim set 15-45691A1

• MerCruiser gear housing assemblies using GLM 23260 / Sierra 18-2283 replacement shim kit references

• Drive Type: MerCruiser MC-1 / R / MR / Alpha One Gen I stern drive where specified

• System Type: Driveshaft bearing cup to gear housing shim set

• Fitment Note: Shim selection is measurement-based during gearcase setup and must match the exact drive housing, bearing and gearcase configuration.

🔌 Function

The shim set controls bearing cup position and bearing preload in the gear housing. Correct shim selection is essential for gear alignment, bearing life and proper drive operation after gearcase service.

Common signs of failure:

• Incorrect gearcase bearing preload after rebuild

• Gear whine caused by incorrect gear setup

• Bearing cup replaced and reshimming required

• Gear housing rebuilt after water intrusion or bearing failure

• Original shim stack damaged, lost or unsuitable for reuse

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging