804296 Mercury Retainer | Genuine Used Part

🔧 Product Description

Genuine Mercury Thermosensor Retainer - Part Number: 804296

A genuine Mercury retainer that secures thermosensor 804295T to the engine on selected Yamaha-manufactured 75HP to 115HP four-stroke outboards.

The retainer holds the temperature sensor firmly against its mounting and sealing components so the sensor can provide an accurate signal to the ignition or engine-control system.

⚙️ Key Features

• Genuine Mercury sensor-retaining component
• Correct part number 804296
• Secures thermosensor 804295T
• Factory shape provides correct sensor pressure and alignment
• Used on Yamaha-built Mercury inline-four engines
• Suitable for carburetted and EFI model families

🚤 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 retainer fixes the thermosensor at the correct depth and contact pressure. Secure mounting is required for accurate engine-temperature monitoring and overheat protection.

⚠️ Common Signs of Failure

• Sensor is loose in its mounting
• Temperature reading is intermittent
• Retainer is bent or cracked
• Sensor gasket does not remain compressed
• Mounting bolt or hole is damaged

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 804296 current documented retainer reference
• No direct supersession confirmed

OEM / Related Numbers

• 804296
• 804295T thermosensor
• 8042941 related sensor plate
• 27-8042971 sensor gasket
• 10-811188T related mounting bolt
• 10-811188M related bolt reference
• 10-852776 8 related bolt reference

Aftermarket / Verified Equivalents

• Specialist used or new-old-stock Mercury 804296 retainer
• Aftermarket thermosensors may be available, but normally reuse the OEM retainer
• No verified direct Yamaha retainer number
• No verified direct aftermarket retainer

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated
• Replace the sensor gasket during installation