Sierra 18-2582 Gasket Carburetor Bowl Johnson/Evinrude 338813

Keep your Johnson or Evinrude outboard running smooth as silk with the Sierra 18-2582 carburetor bowl gasket. Boat owners know the frustration of fuel leaks or erratic idling from a worn-out gasket—issues that can sideline your adventures on the water. This precision-engineered replacement seals the carburetor bowl tightly, preventing leaks and ensuring consistent fuel flow for reliable performance every time you hit the throttle.

Engineered for Precision and Durability

Crafted from high-quality materials resistant to fuel, ethanol blends, and harsh marine environments, the Sierra 18-2582 stands up to the rigors of saltwater and freshwater use. Unlike flimsy generics, this gasket matches the exact specifications of the original 338813, delivering a flawless fit without the guesswork. It's the go-to choice for mechanics and DIY enthusiasts who demand parts that last season after season.

Seamless Compatibility with Johnson and Evinrude Models

Designed specifically as a direct replacement for Johnson/Evinrude OEM part 338813, it fits a range of popular 2-cylinder outboards in the 40-70 HP range. Whether you're tuning up a classic or maintaining a workhorse motor, this gasket restores factory-like sealing. Always cross-check your engine's carburetor setup for the perfect match—peace of mind starts with compatibility.

Spot the Signs: When to Swap Your Carb Bowl Gasket

• Fuel puddles under the cowling or a wet carburetor bowl
• Hard starting, especially after sitting idle
• Rough idling or hesitation under load
• Fuel smell mixed with poor throttle response
• Visible cracks or hardening on the old gasket

Catching these early prevents bigger headaches like fouled plugs or carb flooding. A fresh Sierra gasket fixes it fast, often in under 30 minutes.

Step-by-Step Installation Tips from the Pros

Swapping this gasket is straightforward—no special tools required beyond basics like a screwdriver set and carb cleaner.

1. Shut off fuel, disconnect the battery, and drain the bowl if needed.
2. Remove the bowl retaining screw and gently lift off the bowl.
3. Clean mating surfaces thoroughly—debris is the enemy of a good seal.
4. Place the new Sierra 18-2582 gasket on the bowl flange, ensuring even alignment.
5. Reinstall, torque to spec (usually 25-35 in-lbs), and test for leaks.

Pro tip: Use a dab of fuel-resistant sealant on the screw threads if your kit allows, and always float-test the needle valve after reassembly.

Boost Longevity with Smart Carb Maintenance

Pair this gasket with routine care: Run your motor with fuel stabilizer during storage, inspect floats annually, and rebuild carbs every 100 hours or after winter layup. Ethanol in modern fuels accelerates gasket degradation, so fresh replacements like Sierra keep you ahead of the curve. Proactive swaps mean fewer breakdowns and more time fishing or cruising.

Trust Sierra for Aftermarket Excellence

Sierra Engine Parts has built a reputation among boaters for affordable, reliable alternatives that perform like OEM without the premium markup. Rigorous testing ensures this 18-2582 gasket meets or exceeds industry standards, giving you confidence on the water. Join thousands of satisfied outboard owners who've ditched downtime for dependable power.