Mercury Outboard Water Pump Gasket Gear Housing 16160004
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Mercury Quicksilver 16160004 is a genuine OEM gasket used in the gear housing / driveshaft water pump assembly on select small Mercury and Mariner outboards. Current Mercury-oriented parts diagrams place 16160004 in the water pump stack between the lower gear housing components and the water pump plate, which makes this a water-pump service gasket rather than a general engine gasket.
Key Features
- Genuine Mercury Marine OEM part number 16160004 / 27-16160004.
- Used in the gear housing / driveshaft water pump service area on compatible small outboards.
- Current Mercury-oriented diagrams show it paired with nearby water pump parts such as plate 16159, impeller 161543 / 8M0204676, liner 16157, and upper water pump housing 16156.
- Current dealer listing shows GTIN / UPC 745061116337.
- Current dealer shipping specs are approximately 0.01 lb, 2.50 in. x 1.88 in. x 0.13 in.
Engine Compatibility
The strongest supportable fitment for 16160004 is small Mercury and Mariner outboards in the gear housing / driveshaft service area, including current where-used coverage for 4 HP and 5 HP 2-stroke models and 4 HP, 5 HP, and 6 HP 4-stroke models across the listed serial ranges. Current dealer references also connect it to some related small-engine variants in the same lower-unit family.
Serial Number Fitment Notice
Verify fitment by exact outboard serial number and the correct gear housing / driveshaft or gear housing components diagram before ordering. This gasket appears across multiple small Mercury and Mariner lower-unit families, so serial-based confirmation is the safest way to match the correct water pump service gasket.
When This Part Needs Replacement
Replace this gasket whenever the water pump housing is opened, or when the existing gasket is torn, compressed, leaking, or no longer sealing correctly. Because current parts diagrams place it directly in the water pump stack, renewing it during impeller or lower-unit water pump service is usually the right move instead of reusing the old gasket. This is a practical service inference supported by its documented location in the pump assembly.
Installation Notes
Install 16160004 only after confirming the correct Mercury or Mariner lower-unit diagram for the outboard being serviced. Current diagrams show it in the same service stack as the water pump plate, impeller, liner, and upper water pump housing, so it should be matched to the exact pump layout during reassembly.
Alternate/Superseded Part Numbers
Current sources connect earlier Mercury OEM number 16160 to active part number 16160004.
Parts Desk Insight
With small outboard water pump parts, the important match is the exact lower-unit diagram, not just the word “gasket.” A quick serial-number lookup usually saves time because several nearby gaskets in the same pump stack can look similar on the bench.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
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