O-ring for Pump Cover PARSUN F4-04090009

Which engines is it compatible with?

The PARSUN F4-04090009 pump cover O-ring is a critical sealing element designed for the reliable operation of fuel pumps in outboard motors. Although raw data suggests a connection to the F4/F5 series, it is crucial to verify compatibility before purchasing. Due to the lack of a complete model list in official specifications, we cannot definitively confirm fitment for specific brands (e.g., Mercury or Yamaha) without verification. We recommend relying on the manufacturer's catalog number F4-04090009 or your engine's original OE number. If you have any doubts about part selection, contact our store support so we can help you choose the perfect replacement and avoid errors.

Installation and Operation

Replacing this seal is a simple but key preventive measure. A damaged O-ring can cause fuel leaks, leading to reduced engine performance or even dangerous fires. During installation, always use a new seal – never reuse old rings, even if they appear intact. Before installing the new O-ring, thoroughly clean the seat of any remaining rubber residue and dirt. Lubricate the seal with a small amount of clean fuel or engine oil, which facilitates installation and prevents the rubber from twisting during tightening. Regularly checking the condition of seals before each boating season is the best investment in the safety and longevity of your equipment.

• High manufacturing quality – guarantees durable sealing of the fuel pump.
• Specialized application – dedicated to PARSUN outboard motors.
• Easy replacement – standard size facilitating home service.
• Leak protection – prevents fuel loss and breakdowns on the water.