# 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

## Details

- **Price:** 35.0 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Gauges | Marine Gauges & Instrumentation

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 35.00 AUD | In stock |

## Images

- 0174818 OMC Evinrude Speedo | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/0174818-omc-evinrude-speedo-genuine-used-part)
> Updated: 2026-07-18