Mercury – Quicksilver Exhaust End Cap Riser Gasket | PCM Ford 302 & 351 Replacement | Marine-Grade Sealing Component | 8M0162540

Overview

There’s a special kind of respect that grows between a boater and an inboard engine over the years. These engines have a heartbeat of their own, and when they’re looked after properly, they reward you with smooth mornings, reliable pulls and steady performance through rough patches. The Mercury Marine part number 8M0162540 Exhaust End Cap Riser Gasket brings that sense of security back into your maintenance routine. Designed for PCM Ford 302 and 351 engines, this gasket restores the tight, dependable seal your exhaust system relies on — a small detail that makes a big difference every time you turn the key.

Key Features

• Replacement exhaust end cap riser gasket for PCM Ford 302 and 351 marine engines
• Direct replacement for PCM Ford part number RM0099
• Manufactured to stringent OEM specifications for precise fitment
• Built to withstand extreme heat, moisture and pressure found in inboard exhaust systems
• Engineered by Quicksilver for long-term reliability and consistent sealing performance

Engine & Boat Compatibility

• Designed for PCM Ford 302 and 351 marine powerplants
• Ideal for ski and wake boats, classic inboards, sport cruisers and family runabouts powered by PCM Ford engines
• Suitable for both freshwater and saltwater applications
• Works in systems requiring exact riser-to-end-cap sealing for proper cooling and exhaust flow

Performance & Practical Benefits

The exhaust system in a PCM Ford engine is more than just a pathway for gases — it’s part of the cooling system, part of the engine’s rhythm and a major guardian of long-term reliability. Over time, heat and moisture wear down gaskets, and signs are easy to overlook: a little moisture around the riser, a small change in engine tone, maybe a hint of uneven cooling. Replacing your gasket with this Quicksilver OEM-quality component restores a seal you can trust.

During installation, the difference becomes obvious. The gasket sits naturally into place, and as you tighten the bolts, you can feel it compress evenly — no bunching, no fraying, no guessing. Once your system is back together, the result shows itself in the smoothness of your engine. Exhaust gases flow cleanly. Water moves through the cooling passages the way it was designed. Temperature stays steady. And your inboard runs with a confidence you’ll notice both at idle and when you throttle up.

Unlike bargain aftermarket gaskets, this one is built for the long haul. It resists heat cycles, salt exposure and vibration without deteriorating or deforming. That durability helps protect your manifolds and risers from premature wear, and helps you avoid bigger repairs down the road. It’s exactly the kind of reliability you want backing your next trip.

Why Buy OEM

When it comes to sealing components on a marine engine, precision is everything. Exhaust leaks and cooling issues can start small and grow into expensive, time-consuming problems. That’s why OEM parts are the smart choice. Quicksilver engineering means exact fit, tested materials and a product built to handle real boating conditions. Aftermarket options may save a few dollars, but inconsistent thickness or poor-quality materials can create weak points you don’t want in such a critical system. Ask any seasoned boater, and they’ll tell you: use OEM for your risers and manifolds, and you’ll sleep easier at night.

FAQ

Q1: Which engines does the 8M0162540 gasket fit?

It fits PCM Ford 302 and PCM Ford 351 engines, replacing OEM gasket RM0099.

Q2: What sets this gasket apart from aftermarket versions?

Superior material quality, precise fitment and long-lasting sealing performance under marine stress.

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

Check your engine’s service manual. If your system uses PCM Ford part RM0099, this is the correct replacement.

Q4: Can this gasket be used in both saltwater and freshwater?

Yes — it’s built for durability in both conditions, resisting corrosion and heat.

Q5: Is installation straightforward?

Yes. If you’ve worked on riser or manifold components before, this gasket installs cleanly and securely.