173605 0173605 OMC Tachometer | Genuine Used Part

🔧 Product Description

Genuine OMC 6000 RPM Plug-In Tachometer - Part Number: 0173605

A genuine OMC aluminium-bezel tachometer for selected Johnson and Evinrude outboards.

OMC part number 0173605, also written as 173605, identifies a 6000 RPM plug-in tachometer kit used primarily with 70HP through 235HP outboards in late-1970s and early-1980s rigging systems.

⚙️ Key Features

• Genuine Johnson / Evinrude OMC tachometer
• Correct part number 0173605
• Unprefixed reference 173605
• 0-6000 RPM scale
• Aluminium bezel and plug-in electrical connection

🚤 Compatibility

Commonly used on

• Johnson and Evinrude plug-in rigging systems
• OMC electric-start outboards using the compatible alternator signal

Typically suits

• Johnson / Evinrude 70HP-235HP outboards
• 1979 Evinrude instrument installations
• 1980 and 1981 Johnson instrument systems
• 1982 Evinrude tachometer kits
• 1983 Johnson rigging accessories
• Gauge Range: 0-6000 RPM
• Engine Type: Johnson / Evinrude two-stroke outboard
• Year Range: Approximately 1979-1983
• Fitment Control: Plug-in connector and tachometer pulse signal

🔌 Function

The tachometer converts the engine alternator or ignition pulse signal into an RPM reading.

⚠️ Common Signs of Failure

• Gauge remains at zero
• Needle jumps or drops intermittently
• RPM reading is inaccurate because of a charging-system fault
• Plug-in connector is corroded or loose
• Internal needle movement sticks
• Lens or illumination has deteriorated

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 0173605 documented OMC 6000 RPM plug-in tachometer
• 173605 unprefixed OMC number
• No verified direct superseding service number

OEM / Related Numbers

• 0173605
• 173605
• Related OMC plug-in instrument harness
• Related tachometer signal lead
• Related mounting bracket, bulb and socket

Aftermarket / Verified Equivalents

• Faria Beede 6000 RPM Johnson / Evinrude-compatible tachometer - functional replacement
• Sierra / Teleflex selectable 6000 RPM outboard tachometer - functional replacement
• Modern replacements may require terminal or harness changes
• No current replacement exactly duplicates the aluminium-bezel appearance

📦 Condition

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