Mercury Verado Oil Drain Seal 8M0188614
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Mercury Verado Oil Drain Seal 8M0188614
Part Number: 8M0188614
Brand: Mercury / Quicksilver
Product Type: Engine Oil Drain Seal (OEM)
System: Outboard Engine Lubrication
Application: Oil drain plug sealing washer / gasket
Quantity Required: 1 per oil drain service
Approximate Weight: 20 g
Replaces: 26-888593
What This Part Does
The 8M0188614 is a genuine Mercury OEM oil drain seal used at the engine oil drain connection on selected Mercury Verado outboards. It seals the drain plug to the engine block, preventing oil from leaking at the drain point after an oil change. This seal should be replaced at every oil change — a used, compressed seal may look serviceable but will not reliably prevent seepage once refitted under load and heat.
Compatible Applications
Confirm your engine model and serial number before ordering. Mercury Verado engine configurations vary by horsepower and cylinder count.
- Mercury Verado L6 (selected models — confirm by serial number)
- Mercury Verado L4 150–200 HP (confirm by serial number)
Fitment should always be confirmed by engine model, serial number, and the applicable Mercury parts diagram for the oil drain system on your specific Verado configuration.
Service Interval
Replace 8M0188614 at every engine oil change. Mercury recommends replacing the oil drain seal each time the drain plug is removed — reusing a seal that has already been compressed under the drain plug torque risks a slow oil leak that may not be immediately visible at the dock.
When to Replace
- At every scheduled engine oil change (replace as a matter of course)
- Seal is flattened, cut, or distorted on inspection
- Seal has hardened with age
- Oil seepage is present around the drain plug
- Drain plug was removed for any reason
Installation Notes
- Fit a fresh 8M0188614 seal each time the oil drain plug is reinstalled
- Clean the drain plug threads and seating surface before fitting the new seal
- Torque the drain plug to the specification in the Mercury Verado service manual for the engine
- After refilling with the correct oil grade and quantity, run the engine and inspect the drain plug area for any seepage before returning to service
Part Number Cross-Reference
- Current OEM: 8M0188614
- Earlier related reference: 26-888593
Technical FAQ
Q: Do I need a new seal every oil change?
A: Yes. Mercury specifies replacing the oil drain seal at every oil change on Verado engines. The seal is a low-cost consumable and reusing a previously torqued seal risks a drain plug oil leak that can be difficult to trace back to the drain point.
Q: What replaced 26-888593?
A: 8M0188614 is the current OEM ordering number associated with earlier reference 26-888593. If your parts manual lists 26-888593, 8M0188614 is the correct current replacement.
Parts Desk Insights
Best use case: Stock 8M0188614 as a standard consumable for Verado oil service. Order together with the correct Verado oil filter when scheduling an oil change — having the seal on hand before the drain plug comes out avoids a last-minute parts run.
Common issues: The most common issue is reusing the old seal after an oil change, which leads to a slow drain plug seep that is often misdiagnosed as a more serious oil leak. Replace the seal every time the drain plug is removed. Also confirm the Verado cylinder count and serial number — L4 and L6 Verado configurations may have different drain plug and seal specifications.
Related Parts
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
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