Mercury – Quicksilver Drain Screw Gasket Kit | Yamaha Replacement Sealing Washers | Marine-Grade Fitment | 8M0162525

Overview

Every boater knows the value of the small parts — the ones most people never think about until they fail at the worst possible moment. A simple drain screw gasket may not seem like a big deal, but anyone who maintains their own engine knows that these tiny seals hold back a lot more than oil. When they’re fresh, you feel confident tightening the screw down after a gear lube change. When they’re worn, the doubt creeps in. The Mercury Marine part number 8M0162525, a Quicksilver drain screw gasket kit for Yamaha engines, brings back that peace of mind with a pack of five durable, dependable sealing washers you can trust season after season.

Key Features

• Replacement drain screw gasket kit designed for Yamaha outboards
• Replaces Yamaha part number 90430-14M09
• Includes five high-quality sealing gaskets per pack
• Designed for tight, reliable sealing during gearcase service
• Built with marine-grade materials for long-term durability

Engine & Boat Compatibility

• Compatible with a wide range of Yamaha outboards that use the 90430-14M09 gasket
• Works well for both lower-unit and gearcase drain and fill screw sealing
• Suitable for bass boats, pontoons, offshore vessels, runabouts, bay boats and more
• Ideal for DIY maintenance, seasonal service or stocking your onboard spares kit

Performance & Practical Benefits

It’s amazing how much depends on a small, round gasket. When you install a new one and feel it compress evenly under the screw head, there’s a sense of security — the kind that tells you your gear lube is staying exactly where it should. These Quicksilver gaskets deliver that reassuring tightness every time. They’re engineered to create a smooth, even seal, helping prevent leaks that could lead to aeration, water intrusion or long-term gear damage.

If you’ve ever serviced a lower unit and found yourself reusing an old gasket because you didn’t have a spare, you already know why a pack of five makes sense. With these on hand, you’re always prepared. Each gasket compresses cleanly without tearing, giving you a steady, secure seal that holds up through vibration, pressure changes and constant exposure to the marine environment.

Another benefit is the long-term corrosion resistance. These gaskets are built for saltwater, freshwater and everything in between. They won’t break down prematurely like low-quality aftermarket versions often do, and they help ensure smooth maintenance later — no sticking, no shredding, no surprises when you back out the drain screw next season.

Why Buy OEM

When it comes to sealing components, precision matters. Genuine Quicksilver parts are engineered to match factory specifications, so you’re not dealing with questionable fit or materials that can’t handle marine demands. Aftermarket gaskets often vary in thickness or hardness, which can lead to poor sealing or over-tightening. With OEM, you know the gasket fits correctly, seals cleanly and lasts longer. If a fellow boater asked for advice during haul-out season, you’d probably tell them the truth: it’s not worth gambling on the cheap stuff when a proper seal protects your entire gearcase.

FAQ

Q1: Which engines does the 8M0162525 gasket kit fit?

It replaces Yamaha part number 90430-14M09 and fits a wide range of Yamaha outboards that use this gasket for drain and fill screws.

Q2: What makes this OEM kit better than aftermarket gaskets?

The material quality and fitment are more consistent, giving you a tighter, more reliable seal.

Q3: How do I confirm this is the correct gasket for my motor?

Check your service manual. If your Yamaha uses gasket 90430-14M09, this Quicksilver kit is the correct replacement.

Q4: Is it suitable for both freshwater and saltwater?

Yes — the marine-grade materials hold up well in any environment.

Q5: Is installation easy for most boat owners?

Absolutely. If you’ve performed a gear lube change before, you’ll find these gaskets install smoothly and securely.