Face Plate Lower Gasket – Fits Mercury Outboard 60-300HP (Replaces 27-8M0142616)

$6.80 $10.00

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Product Details

This is an aftermarket Face Plate Lower Gasket designed for a precise fit on Mercury Marine 60HP and 200-300HP 4-Stroke outboard engines. It serves as a crucial seal between the face plate and the gear case, preventing water intrusion and oil leaks.

It provides a direct interchange for OEM part numbers 27-8M0050720, 27-8M0142616, 8M0112903, and 8M0142616.

Installation Location: Sits directly between the lower unit's face plate and the gear case housing.
Material: Constructed from durable Nitrile Coated Stainless Steel for a superior seal and corrosion resistance.
Package Contents: Includes one lower face plate gasket ready for installation.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number	Superseded By	Notes
Mercury	27-8M0050720	27-8M0142616	Superseded
Mercury	8M0112903	27-8M0142616	Superseded
Mercury	27-8M0142616		Current OEM Part Number

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This gasket is designed for select Mercury Marine 4-stroke outboard models.

Brand	Model	Rated HP	Stroke	OEM Part No.	Notes
Mercury	Outboard	60	4-Stroke	27-8M0142616	Face plate to gear case
Mercury	Outboard	200	4-Stroke	27-8M0142616	Face plate to gear case
Mercury	Outboard	225	4-Stroke	27-8M0142616	Face plate to gear case
Mercury	Outboard	250	4-Stroke	27-8M0142616	Face plate to gear case
Mercury	Outboard	300	4-Stroke	27-8M0142616	Face plate to gear case

Technical Specs

Product Type: Lower Gasket / Face Plate Gasket
Installation: Between face plate and gear case
Material: Nitrile Coated Stainless Steel
Dimensions: 11.5 × 9.6 × 0.1 inches (approx. 292 × 244 × 2.5 mm)
Weight: 0.05 lb (0.023 kg)
OEM Warranty: OEM part warranty applies

What’s in the Box

1 x Gasket Lower Nitrile Coated Stainless Steel (27-8M0142616)

Installation Notes

Ensure the engine is off and the battery is disconnected for safety.
Drain the gearcase lubricant completely into an approved container.
Carefully remove the lower unit (gearcase) from the outboard's driveshaft housing.
Unbolt and remove the face plate to access the old gasket.
Remove the old gasket. Use a plastic scraper to clean any remaining gasket material from both the gearcase and face plate surfaces. Ensure both surfaces are spotless and dry.
Position the new gasket correctly onto the gearcase.
Reinstall the face plate, tightening the bolts in a crisscross pattern to the manufacturer's specified torque.
Reattach the lower unit to the engine.
Refill the gearcase with the recommended marine gear lubricant.
After a brief run, re-check for any signs of water intrusion or oil leaks.

Troubleshooting & FAQ

How do I know if this gasket fits my specific engine model and year?

This gasket fits a range of Mercury 60-300HP 4-Stroke outboards. The best way to confirm is to match your existing part number to 27-8M0142616 or one of its superseded numbers (27-8M0050720, 8M0112903). Always check the compatibility table and visual appearance against your old part.

What are the signs of a failed lower face plate gasket?

Common symptoms include milky or watery gear lube (indicating water intrusion), visible oil leaks around the lower unit's face plate, or low gear lube levels without an obvious external leak source.

Is any sealant or adhesive required during installation?

No. This gasket is designed to be installed dry. The nitrile coating provides the necessary sealing properties. Applying additional sealants can interfere with the seal and make future removal difficult.

What is the advantage of a Nitrile Coated Stainless Steel gasket?

This composite construction combines the strength and corrosion resistance of stainless steel with the excellent sealing properties of nitrile rubber. It provides a durable, reliable seal that resists oil, fuel, and saltwater.

Why is my old part number different?

Manufacturers often update and supersede part numbers over time. This part, 27-8M0142616, replaces older numbers like 27-8M0050720 and 8M0112903. As long as your model is listed as compatible, this part will fit.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost?

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns?

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement, not an OEM component.
Professional installation is recommended for safety and performance.

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