57898PH Sierra Speedometer | Genuine Used Part

🔧 Product Description

Genuine Sierra Amega 50 MPH Mechanical Speedometer - Part Number: 57898PH

A genuine used Sierra Amega Series marine speedometer for measuring boat speed through a conventional pitot-pressure system.

The black-face instrument has a 0-50 MPH scale, contrasting numerals and perimeter illumination. It requires a pitot pickup or compatible gearcase pressure outlet and a small pressure hose.

⚙️ Key Features

• Genuine used Sierra speedometer
• Correct part number 57898PH
• Amega Series black-face design
• 0-50 MPH speed range
• Mechanical pitot-pressure operation
• Three-inch-class instrument body

🚤 Compatibility

Commonly used on

• Outboard and sterndrive boats
• Instrument panels using pitot speed measurement

Typically suits

• Speed Range: 0-50 MPH
• Input Type: Mechanical water pressure
• Electrical Connection: Illumination only
• Engine Type: Not engine-specific
• Dash opening must be measured before installation

🔌 Function

Water pressure generated by the boat's forward movement travels through the pitot hose and moves the gauge's internal diaphragm and needle.

⚠️ Common Signs of Failure

• Gauge remains at zero
• Speed reading is inaccurate
• Pitot pickup is blocked
• Pressure hose is kinked or split
• Water leaks behind the dash
• Needle sticks
• Gauge does not return to zero

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 57898PH Sierra Amega speedometer-head reference
• 57898P related part-number format used in some catalogues

OEM / Related Numbers

• 57898PH
• 57898P
• Sierra Amega 50 MPH speedometer
• Related pitot pickup
• Related pressure tubing and mounting bracket

Aftermarket / Verified Equivalents

• Current Sierra Amega 50 MPH mechanical speedometer with matching cut-out
• Faria 50 or 55 MPH pitot speedometer
• Teleflex / SeaStar mechanical marine speedometer
• Universal 50 MPH pitot speedometer with a compatible hose fitting

📦 Condition

• Genuine used part
• Pitot pickup and tubing included only where shown or stated
• Removed from running boat where applicable
• In good working condition unless otherwise stated