873688 Volvo Penta Tacho | Genuine Used Part

🔧 Product Description

Genuine Volvo Penta 4600 RPM Tachometer with Hour Meter - Part Number: 873688

A genuine used Volvo Penta electronic marine diesel tachometer with a 0-4600 RPM scale and integrated LCD engine-hour display.

The instrument receives an engine-speed signal from the alternator or compatible Volvo Penta instrumentation system and displays accumulated operating hours in the lower LCD window. Part number 873688 belongs to the earlier 4600 RPM tachometer family later serviced under 873992 and 23715875.

⚙️ Key Features

• Genuine Volvo Penta marine diesel tachometer
• Correct original part number 873688
• 0-4600 RPM operating scale
• Integrated LCD engine-hour display
• Compatible with the related 873660, 873992 and 23715875 gauge family

🚤 Compatibility

Commonly used on

• Volvo Penta marine diesel instrument panels
• Alternator W-terminal and compatible electronic tachometer systems
• Volvo Penta installations using the 873688 or 873992 gauge family

Typically suits

• Engine families:
• Selected Volvo Penta AD-series marine diesels
• Selected Volvo Penta KAD and KAMD marine diesels
• Selected Volvo Penta TAMD marine diesels
• Other Volvo Penta engines whose parts catalogue specifies 873688, 873660 or 873992
• Tachometer Range: 0-4600 RPM
• Instrument Type: Electronic marine diesel tachometer with hour meter
• Electrical System: Commonly compatible with 12-volt and 24-volt Volvo Penta panels, subject to gauge specification
• Fitment Requirement: Match the rear connector, signal source, scale and dashboard opening

🔌 Function

The tachometer displays engine speed and records cumulative operating hours for maintenance scheduling and engine-use monitoring.

⚠️ Common Signs of Failure

• Tachometer remains at zero while the engine is running
• RPM reading is unstable or inaccurate
• LCD hour display is faded, blank or missing segments
• Gauge loses power or illumination
• Alternator tachometer signal or wiring is faulty

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 23715875 → Later Volvo Penta tachometer service reference
• 873992 → Supersedes 873688 and 873660
• 873688 original 4600 RPM tachometer reference
• 873660 earlier related 4600 RPM tachometer reference

OEM / Related Numbers

• 873688
• VOP873688
• 873660
• 873992
• 23715875
• 873686 related Volvo Penta tachometer family
• 873998 related tachometer family with different calibration
• Confirm 4600 RPM scale and rear electrical connector before installation

Aftermarket / Verified Equivalents

• Replacement LCD hour-meter display screens are available for 873688, 873992, 873686 and 873998 tachometers
• No complete branded direct aftermarket tachometer has been verified
• VDO and Veethree diesel tachometers may provide a functional replacement when signal type, RPM range and cutout match

📦 Condition

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