41505A1 Mercruiser Side Cover | Genuine Used Part

🔧 Product Description

Genuine MerCruiser 3.7L Engine-Block Side Cover - Part Number: 41505A1

A genuine used aluminium block side cover for the MerCruiser 3.7L / 224 CID inline-four engine family. The cover closes the large inspection opening in the side of the unique MerCruiser block. Part number 41505A1 supersedes earlier cover 68711 and uses side-cover gasket 72479A5.

⚙️ Key Features

• Genuine Mercury MerCruiser side cover
• Correct part number 41505A1
• Supersedes earlier 68711 cover
• Used on 3.7L / 224 CID inline-four engines
• Matches gasket 72479A5

🚤 Compatibility

Commonly used on

• MerCruiser 470-family inline-four engines
• MerCruiser 165HP, 170HP, 180HP and 190HP variants
• MerCruiser 485, 488, 3.7L and 3.7LX engines

Typically suits

• 470 two-barrel and four-barrel engines
• 165 / 170 / 180 / 190 model families
• 485 and 488
• Approximately 1976-1989 production
• These engines share the MerCruiser-designed 224 CID block
• Engine Size: 3.7L / 224 CID inline-four
• Year Range: Approximately 1976-1989
• Supersedes: 68711
• Gasket: 72479A5 / earlier 68706
• Fitment Requirement: Inspect the cover for warping and electrolysis before reuse

🔌 Function

The side cover seals the block inspection cavity and keeps engine oil inside while allowing access during major engine service.

⚠️ Common Signs of Failure

• Oil leaking from the side-cover gasket
• Cover warped from overtightening
• Corrosion or pinholes
• Damaged screw holes
• Hardened screw O-rings

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 41505A1 supersedes 68711
• The cover is discontinued as a current new-production part
• Earlier diagrams may list gasket 68706 while later service uses 72479A5

OEM / Related Numbers

• 41505A1
• 41505
• 68711
• 72479A5 side-cover gasket
• 68706 earlier gasket reference
• 881892 side-cover screw
• 26543 screw O-ring

Aftermarket / Verified Equivalents

• No verified new aftermarket aluminium cover
• Used genuine 41505A1 / 68711 covers
• Aftermarket side-cover gasket sets based on 72479A5
• Custom-machined replacement only when dimensions and sealing are reproduced exactly
• Used complete 3.7L block assemblies as donor sources

📦 Condition

• Genuine used part
• Removed from running engine or vessel where applicable
• In good working condition unless otherwise stated