Volvo Penta IPS Breather kit replacement for part #840559

Protect your Volvo Penta IPS drive from costly water intrusion with the Cogswell Marine & Motorsports Breather Kit. Designed for IPS A-E and IPS 10 A-B models, this essential vent system converts your drive into a properly breathing case, eliminating the vacuum effect that causes water to be pulled through lower and prop seals during cooling cycles. When your drive cools after use, internal pressure drops and creates suction that draws moisture through seals—the leading cause of milky oil and expensive reseal jobs. This breather kit equalizes case pressure, allowing natural expansion and contraction from heat cycling without creating damaging vacuum conditions. Avoid the nightmare scenario: removing your drive from the boat, complete disassembly, resealing, reinstallation, yard fees, labor, and parts costs that can easily reach tens of thousands of dollars. A simple preventative solution now saves you from catastrophic drive failure and extended downtime. Install once, protect your investment for years. The Cogswell breather kit is the smart choice for serious boaters who understand that prevention beats repair. Kit replaces part # 840559 and can work on most models that use this part number cap.