0174048 OMC Tachometer | Genuine Used Part

🔧 Product Description

Genuine OMC Black-Bezel Tachometer Assembly - Part Number: 0174048

A genuine OMC flush-mount analogue tachometer for selected Johnson, Evinrude and OMC Sterndrive applications.

Part number 0174048 replaced earlier tachometer 0172928 and was subsequently replaced by 0174202. It was used as a later universal service replacement across several OMC instrument kits.

⚙️ Key Features

• Genuine OMC analogue tachometer
• Correct service part number 0174048
• Replaces early tachometer 0172928
• Superseded by later tachometer 0174202
• Suitable for compatible outboard and sterndrive pulse signals

🚤 Compatibility

Commonly used on

• Johnson and Evinrude electric-start outboards
• OMC petrol sterndrive instrument panels
• Service replacement for installations previously using 0172928

Typically suits

• Johnson / Evinrude outboards using the applicable alternator or ignition pulse signal
• OMC 175HP and 190HP sterndrive instrument packages
• Selected late-1970s and 1980s OMC installations
• Instrument panels whose service catalogue specifies 0174048 or 0174202
• Electrical System: 12-volt analogue tachometer circuit
• Year Range: Approximately late 1970s - 1980s

🔌 Function

The gauge displays engine speed from the electrical pulse signal produced by the engine's charging or ignition system.

⚠️ Common Signs of Failure

• No RPM reading
• Needle movement is erratic
• Gauge reads incorrectly at all engine speeds
• Internal damping fails and the needle oscillates
• Lens fogs or bezel corrodes
• Backlight or electrical terminals fail

🔄 Supersession & Cross Reference

OEM Supersession Chain

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

OEM / Related Numbers

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

Aftermarket / Verified Equivalents

• No verified direct cosmetic reproduction
• Faria Beede universal marine tachometer - functional replacement
• Sierra / Teleflex universal selectable-pulse tachometer - functional replacement
• Replacement tachometer must support the original engine's pulse-per-revolution signal

📦 Condition

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