Yamaha - Pump Diaphragm Fuel System Component 6R7-14541-00-00. Overview. A diaphragm might seem like a small piece, but it's doing a lot of work every time the engine runs. I've seen engines struggle to stay running or lose power just because this part got stiff or worn out. When it's fresh and flexible, fuel delivery stays consistent and the motor responds the way it should. It's one of those maintenance items you don't want to overlook.. Key Features. • Responsive Fuel Pump Operation - Flexes properly to maintain steady fuel movement through the system.• OEM Fit and Function - Built to match factory specifications for reliable performance.• Flexible Material Design - Maintains elasticity for consistent operation over time.• Supports Engine Efficiency - Helps ensure smooth fuel delivery for stable performance.. Engine & Boat Compatibility. Designed for Yamaha outboard engines equipped with diaphragm-style fuel pumps. Commonly used across a range of Yamaha outboards where consistent fu