0174818 OMC Evinrude Speedo | Genuine Used Part

🔧 Product Description

Genuine OMC Tech Series 50 MPH Speedometer - Part Number: 0174818

A genuine Johnson and Evinrude Tech Series mechanical speedometer with a 50 MPH range.

The gauge operates from water pressure produced by a transom-mounted pitot pickup or a compatible gearcase speedometer passage. Pressure travels through a small hose to the rear of the gauge and moves the speedometer mechanism.

Part number 0174818 replaced earlier 30 MPH Tech Series speedometer 0175310.

⚙️ Key Features

• Genuine OMC Tech Series speedometer

• Correct part number 0174818

• 0-50 MPH display range

• Mechanical pitot-pressure operation

• Supersedes 30 MPH gauge 0175310

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 0174818 → Supersedes 0175310

• 0175310 earlier Tech Series 30 MPH / KPH speedometer

• 0174818 later Tech Series 50 MPH speedometer

OEM / Related Numbers:

• 0174818

• 174818

• 0175310

• 175310

• 0121829 related 23-foot speedometer pressure hose

• 0120001 related hose clamp

• Related pitot pickup and transom mounting hardware

• Related instrument bulb and socket

Aftermarket / Verified Equivalents:

• Faria Beede 50-60 MPH mechanical pitot speedometer - functional replacement

• Sierra / Teleflex mechanical pitot speedometer - functional replacement

• No current aftermarket gauge is a direct cosmetic duplicate of the OMC Tech Series face

🚤 Compatibility

Commonly used on:

• Johnson and Evinrude outboard instrument panels

• OMC Tech Series dashboards

• Boats using a pitot pickup or gearcase pressure outlet

Typically suits:

• OMC instrument installations from approximately 1989 onward

• 1993-2009 Johnson / Evinrude rigging catalogues

• Boats previously using 30 MPH speedometer 0175310 where the later 50 MPH scale is acceptable

• Any compatible dashboard using the same mounting diameter and pitot-pressure hose

• Gauge Range: 0-50 MPH

• Input Type: Mechanical water pressure

• Year Range: Approximately 1989 onward

🔌 Function

The gauge converts water pressure created by boat speed into an indicated speed reading.

Common signs of failure:

• Gauge remains at zero while moving

• Pitot pickup or hose is blocked

• Water leaks behind the dashboard

• Needle sticks after storage

• Gauge reads low because the hose leaks

• Internal diaphragm or movement fails

📦 Condition

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated