Mercury Quicksilver 8M0188440 Oil Filter Adapter Gasket – MerCruiser Remote Oil Filter Assembly | Pack of 2
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Mercury Quicksilver Oil Filter Adapter Gasket – MerCruiser Remote Oil Filter Assembly
Part Number: 8M0188440 (prefix: 27-8M0188440)
Brand: Mercury Marine / Quicksilver
Type: Oil filter adapter gasket
Pack: 2 gaskets included
Supersedes: 91892 / 27-91892
Product Overview
Genuine OEM oil filter adapter gasket for MerCruiser gasoline engines equipped with remote oil-filter or oil-cooler adapter assemblies. Seals the adapter mating surface to prevent engine oil leakage at the adapter. Current Mercury replacement for legacy gasket 91892. Sold as a pack of 2.
- Genuine Mercury Marine OEM component
- Seals the remote oil-filter adapter to the engine block mating surface
- Current replacement for 91892 / 27-91892
- Mercury prefix: 27-8M0188440
- Pack quantity: 2 gaskets
Compatible Applications
- MerCruiser gasoline engines with remote oil-filter or oil-cooler adapter assemblies
- Selected MerCruiser inline-4 engines with compatible adapter configuration
- Selected MerCruiser V6 engines with compatible adapter configuration
- Selected MerCruiser V8 engines with compatible adapter configuration
Fitment Note: Confirm the engine serial number and oil-filter adapter diagram before ordering. The most reliable fitment check is matching the existing gasket reference number (91892 or 8M0188440) against your engine’s parts diagram.
Part Number Reference
- Current Mercury: 8M0188440 / 27-8M0188440
- Supersedes: 91892 / 27-91892
When to Replace
- Whenever the oil filter adapter is removed for any reason
- Oil seepage or leakage develops around the adapter sealing surface
- Gasket appears hardened, compressed, torn, or damaged
- During routine oil service on engines with remote filter adapters
Installation Notes
- Clean both mating surfaces thoroughly and remove all traces of the old gasket before installation
- Do not reuse a compressed or previously installed gasket
- Position the new gasket correctly before tightening the adapter
- Torque the adapter to the specification in your Mercury service manual
- Run the engine and check carefully for oil leaks before returning to service
Related Products
- Mercury MerCruiser Remote Oil Filter Hose – 32-864924
- Mercury MerCruiser Oil Adaptor Seal – 26-42077
- Mercury MerCruiser Oil Pan Drain Plug Gasket – 8M0077608
- Sierra 18-7824-2 Marine Oil Filter – GM MerCruiser, Volvo Penta, OMC
- Sierra 18-7879-1 Oil Filter – GM/Chevy V6
- Mercury 4-Stroke Engine Oil 10W-30, 4L – 8M0078638
- Mercury 4-Stroke Marine Engine Oil 25W-40, 4L – 8M0078640
Parts Desk Insights
This gasket is specifically for the remote oil-filter adapter found on certain MerCruiser installations — not a standard oil drain plug gasket or filter O-ring. The most common ordering confusion is customers mixing it up with the oil pan drain plug gasket 8M0077608. Best use case is any engine service that involves removing the remote oil-filter adapter, where the adapter gasket should always be replaced rather than reused. Match by engine serial number or the existing part number on the gasket in the engine’s parts diagram before selling.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
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.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.