804298T Throttle Sensor | Genuine Used Part

🔧 Product Description

Genuine Mercury Yamaha-Derived Four-Stroke Throttle Position Sensor - Part Number: 804298T

A genuine used Mercury Marine throttle-position sensor for selected 75HP, 80HP, 90HP, 100HP and 115HP Yamaha-derived four-stroke outboard motors.

The sensor mounts to the throttle body and reports throttle opening to the engine-management system.

⚙️ Key Features

• Genuine used Mercury Marine throttle sensor
• Correct OEM part number 804298T
• Related Yamaha cross-reference 61A-85885-00-00
• Adjustable throttle-body installation
• Provides throttle-angle data to the ECU or ignition system

🚤 Compatibility

Commonly used on

• Yamaha-derived Mercury and Mariner four-stroke throttle bodies
• Carburetted and electronically managed ignition systems

Typically suits

• Engine models:
• Mercury / Mariner 75HP four-stroke
• Mercury / Mariner 80HP four-stroke
• Mercury / Mariner 90HP four-stroke
• Mercury / Mariner 100HP four-stroke
• Selected Mercury / Mariner 115HP four-stroke applications
• Serial groups including approximately 0T801000 through 1B226999 where 804298T is specified
• HP Range: Approximately 75HP - 115HP
• Engine Type: Mercury / Mariner Yamaha-derived inline four-cylinder four-stroke outboard
• Year Range: Approximately early-to-mid 2000s

🔌 Function

The sensor supplies a variable voltage corresponding to throttle position. This signal is used to determine engine load, acceleration demand and ignition or fuel-management strategy.

⚠️ Common Signs of Failure

• Engine hesitates when accelerating
• Throttle response is inconsistent
• Idle speed is unstable
• Engine cannot reach full RPM
• TPS fault code is stored
• Sensor voltage contains dead spots
• Sensor is incorrectly calibrated
• Wiring movement changes engine speed or response

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 804298T current Mercury throttle-sensor reference

OEM / Related Numbers

• 804298T
• 804298
• Yamaha 61A-85885-00-00
• 61A858850000
• 804302 related mounting bracket
• 804301 related sensor lever
• 859295T1 related adapter harness
• Related throttle-body linkage and mounting screws

Aftermarket / Verified Equivalents

• Aftermarket direct-replacement TPS under 804298T
• Aftermarket direct-replacement TPS under 61A-85885-00-00

📦 Condition

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