804163 Mercury Clamp | Genuine Used Part

🔧 Product Description

Genuine Mercury Crankcase Breather Pipe Clamp - Part Number: 804163

A genuine Mercury clamp used to secure the crankcase breather pipe on selected Yamaha-manufactured 75HP to 115HP four-stroke outboards.

The clamp retains breather pipe 32-804162 at the intake-silencer or crankcase connection and prevents oil vapour, unmetered air and hose movement at the joint.

⚙️ Key Features

• Genuine Mercury breather-hose clamp
• Correct part number 804163
• Secures breather pipe 32-804162
• Used on Yamaha-built Mercury inline-four engines
• Factory diameter and retaining tension
• Suitable for the original intake-silencer arrangement

🚤 Compatibility

Documented on

• Mercury 75HP carburetted four-stroke, serial 0G960500-1B226999
• Mercury 75HP EFI four-stroke, serial 1B172291-1B366822
• Mercury 80HP EFI four-stroke, serial 1B227000-1B366822
• Mercury 90HP carburetted four-stroke, serial 0G960500-1B226999
• Mercury 90HP EFI four-stroke, serial 1B172291-1B366822
• Mercury 100HP EFI four-stroke, serial 1B227000-1B366822
• Mercury 115HP EFI four-stroke, serial 0T178500-1B366822
• Engine Type: Yamaha-manufactured Mercury inline-four four-stroke outboard
• HP Range: 75HP - 115HP

🔌 Function

The clamp seals the breather pipe to its fitting so crankcase vapours are routed into the intake system without allowing the hose to loosen or draw unmetered air.

⚠️ Common Signs of Failure

• Oil mist appears around the hose joint
• Hose slips off its fitting
• Clamp has lost tension
• Clamp is corroded or distorted
• Engine idle is affected by an air leak at the breather connection

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 804163 current documented clamp reference
• No direct supersession confirmed

OEM / Related Numbers

• 804163
• 32-804162 crankcase breather pipe
• 10-804602 related clamp bolt
• Related intake silencer and crankcase breather fittings

Aftermarket / Verified Equivalents

• Marine-grade constant-tension clamp matched to the original hose outside diameter
• Stainless hose clamp only where clearance and hose construction permit
• Specialist used OEM 804163 clamp
• No verified branded direct equivalent

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated
• Confirm clamping tension before reuse