Mercury MerCruiser Audio Warning Alarm Kit - 816492A15
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The Mercury MerCruiser Quicksilver 816492A15 is a genuine Mercury Marine OEM audio warning alarm kit used on select MerCruiser sterndrive and inboard engine packages. This warning buzzer/alert kit is part of the engine protection system and provides an audible alarm when monitored conditions fall outside safe operating range.
Depending on the engine package and harness configuration, the warning system may be tied into critical conditions such as low oil pressure, engine overheat, drive lube level warning, or other MerCruiser safety-monitoring circuits. Always match this alarm kit by engine serial number and factory wiring diagram before ordering.
Key Features
- Genuine Mercury Marine OEM alarm kit.
- Mercury/MerCruiser part number: 816492A15.
- Quicksilver-style catalog reference: 710-816492A15.
- Designed for select MerCruiser sterndrive and inboard engine warning systems.
- Provides an audible warning signal for supported engine protection circuits.
- Used in compatible dash, helm, harness, and engine-alarm wiring layouts.
- UPC reference: 745061576667.
- Important replacement part for failed, weak, missing, corroded, or non-functioning engine warning buzzers.
Engine Compatibility
Common application context includes select gas-powered MerCruiser engine packages where the factory wiring diagram calls for 816492A15, including:
- Select MerCruiser 3.0L inline-4 applications where specified.
- Select MerCruiser 4.3L V6 applications where specified.
- Select MerCruiser 5.0L and 5.7L V8 applications where specified.
- Select MerCruiser 6.2L / 377 CID V8 applications where specified.
- Select MerCruiser 8.1L and 8.2L big-block applications where specified.
- Select Alpha and Bravo sterndrive/inboard engine packages using the matching warning-alarm circuit.
Use this kit only where the Mercury/MerCruiser parts diagram or wiring schematic specifically calls for 816492A15.
Serial Number Fitment Notice
Confirm fitment by MerCruiser engine serial number, harness style, helm wiring, warning system layout, and engine service manual before ordering. MerCruiser engines across similar displacement families can use different warning modules, buzzers, harness plugs, sender circuits, ECM/PCM logic, and alarm configurations depending on year, emissions package, drive type, and instrumentation setup.
When This Part Needs Replacement
Replace this alarm kit if the warning buzzer is silent during key-on self-test, sounds weak or intermittently, has corroded terminals, damaged wiring, cracked housing, or fails diagnostic checks. It should also be inspected when troubleshooting engine alarm complaints, no-audible-warning conditions, false alarms, or warning circuits that do not respond to verified sender inputs.
Installation Notes
Before replacing the alarm kit, verify power, ground, key-on feed, harness continuity, sender operation, and the warning circuit specified in the MerCruiser service manual. A failed oil-pressure switch, temperature sender, drive lube monitor, harness connection, ignition switch feed, or ground fault can mimic a bad alarm buzzer.
Install the kit using the correct factory wiring connections. Do not bypass the warning alarm or leave the engine in service with a disabled alert system. After installation, perform the proper key-on and circuit test procedure to confirm the audible alarm works before returning the boat to operation.
Alternate/Superseded Part Numbers
- 816492A15 ā Mercury/MerCruiser OEM part number
- 710-816492A15 ā Quicksilver-style catalog reference
- 745061576667 ā UPC reference
Parts Desk Insight
The audio warning alarm is a small part of the helm wiring system, but it is important engine protection equipment. A working alarm can alert the operator to overheating, low oil pressure, low drive lube, or other monitored faults before damage occurs. When troubleshooting alarms, confirm whether the issue is the buzzer itself or the sender, harness, ground, or engine protection circuit triggering it.
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Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3ā4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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