0172928 OMC Tachometer | Genuine Used Part

🔧 Product Description

Genuine OMC Black-Bezel 6000 RPM Tachometer - Part Number: 0172928

A genuine OMC analogue tachometer used on selected Johnson, Evinrude and OMC Sterndrive installations.

The black-bezel instrument displays engine speed up to 6000 RPM using the ignition or charging-system pulse signal. It was supplied in flush-mount instrument kits during the 1970s and early 1980s.

Part number 0172928 was replaced by 0174048 and later by 0174202.

⚙️ Key Features

• Genuine OMC analogue tachometer
• Correct part number 0172928
• Black bezel and 6000 RPM scale
• Flush-mount marine instrument
• Full verified OMC supersession chain

🚤 Compatibility

Commonly used on

• Johnson and Evinrude electric-start outboards
• OMC Sterndrive petrol engines
• Flush-mount OMC instrument panels

Typically suits

• Johnson / Evinrude:
• Selected 55HP to 235HP electric-start outboards
• Selected 70HP to 235HP outboards shown with the 6000 RPM tach
• Late-1970s through early-1980s rigging systems
• OMC Sterndrive:
• 1977 OMC 175HP sterndrive
• 1977 OMC 190HP sterndrive
• Other OMC petrol sterndrives using the same tach signal
• Gauge Range: 0-6000 RPM
• Electrical System: 12-volt analogue pulse-input system
• Year Range: Approximately 1976 - early 1980s

🔌 Function

The tachometer counts ignition or alternator pulses and converts their frequency into an engine-speed reading.

⚠️ Common Signs of Failure

• Needle remains at zero with the engine running
• Reading is consistently too high or too low
• Needle jumps or drops intermittently
• Gauge fogs or contains moisture
• Internal illumination fails
• Incorrect pulse selection causes inaccurate RPM

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 0174202 → Supersedes 0174048
• 0174048 → Supersedes 0172928
• 0172928 original black-bezel 6000 RPM tachometer

OEM / Related Numbers

• 0172928
• 172928
• 0174048
• 174048
• 0174202
• 174202
• 0122558 related tachometer mounting bracket
• 0122049 related electrical connector
• 0122552 related instrument bulb
• 0122553 related bulb socket

Aftermarket / Verified Equivalents

• No current aftermarket gauge is a direct cosmetic duplicate
• Faria Beede universal 6000 RPM marine tachometer - functional replacement
• Sierra / Teleflex selectable-pulse marine tachometer - functional replacement
• Functional replacements require the correct alternator or ignition pulse setting

📦 Condition

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