Mercury – Oil Tank Vent Cap Assembly | Fuel & Oil System Component | UV-Resistant Polymer | 19299A1

Overview

Smooth fuel delivery starts with proper airflow, and the Mercury Marine 19299A1 Oil Tank Vent Cap Assembly makes sure your system breathes the way it should. Designed for Mercury 30–125 horsepower carbureted TwoStroke outboards, this vent cap allows your oil tank to equalize pressure, helping oil flow evenly and consistently to the engine. Built from durable, UV-resistant polymer, it’s made to handle years of sun, spray, and vibration — so you can count on reliable performance trip after trip.

Key Features

• Purpose: Allows your oil tank to vent properly for smooth and consistent oil flow.
• Material: Molded from high-strength, UV-resistant polymer to withstand heat, sunlight, and exposure to oil.
• Design Detail: Precision-molded to OEM Mercury dimensions for a tight, leak-free fit.
• Performance: Prevents vacuum buildup that can restrict fuel and oil delivery.
• Durability: Tested for long-term use in harsh marine environments — resistant to fading and cracking.

Engine & Boat Compatibility

• Mercury 30–125HP carbureted TwoStroke outboards.
• Commonly found on runabouts, pontoons, fishing boats, and small cruisers with separate oil tanks.
• Suitable for both freshwater and saltwater operation.
• Check your owner’s manual to confirm fit for your specific model.

Performance & Practical Benefits

The 19299A1 vent cap is a small part that has a big impact on how your outboard runs. By allowing the oil tank to breathe, it keeps oil flowing steadily to your engine’s lubrication system. Without proper venting, pressure can build up or vacuum can form — leading to erratic oil flow or restricted delivery.

This vent cap restores proper pressure balance, helping your motor idle smoothly and run cleanly across the RPM range. The UV-resistant construction holds up to long days in the sun, and the durable seal ensures no leaks or air intrusion. Once installed, it just works — silently keeping your engine fed and protected.

Why Buy OEM

Mercury’s OEM parts are designed to fit and perform exactly as intended. The Quicksilver 19299A1 is a genuine Mercury Marine component, engineered for the oil systems found in their 30–125HP TwoStroke engines. Cheaper aftermarket caps may fit loosely or degrade quickly under UV exposure, leading to leaks or poor venting.

With Mercury’s OEM quality, you get materials that last, fit that’s perfect, and confidence that your oil system will stay balanced and reliable. It’s an easy upgrade that helps ensure long-term performance and protection.

FAQ

Q1: Which engines use this vent cap?
It fits Mercury 30–125HP carbureted TwoStroke outboards with external oil tanks.

Q2: What does the vent cap do?
It lets your oil tank breathe, preventing pressure buildup and allowing smooth oil flow to the engine.

Q3: What’s it made from?
It’s molded from UV-resistant, marine-grade polymer that stands up to heat and weather.

Q4: Can it be used in saltwater?
Yes — the material is corrosion-resistant and built for marine environments.

Q5: Why use a Mercury OEM cap?
It fits perfectly, lasts longer, and maintains the proper venting pressure Mercury engines require.