Johnson Pump 09-808B-1 F35 Impeller Kit 1.58 Inch, Replaces Jabsco 22405-0001, Volvo Penta MB/MD

The Johnson Pump 09-808B-1 is a complete F35 impeller kit built for marine raw water pumps that rely on a 1.58 inch outer diameter, 6-spline impeller. Made from MC97 material engineered for cooling applications, the impeller is designed to deliver stable pressure over time, resist swelling, and minimize the fatigue-related failures that shorten the life of lower-quality replacements. Its self-priming capability and correct impeller geometry help ensure proper cooling flow reaches the engine immediately at startup, which is critical for preventing overheating damage during the first seconds of operation.

This is a full kit, not just a bare impeller: it includes the impeller itself, an o-ring, a gasket, and 7 grams of impeller lubricant to ease installation and protect the impeller vanes on first run. The 09-808B-1 measures 1.58 inches in outer diameter and 0.75 inches in width, with a 6-spline inner bore. It is a direct replacement for Jabsco No 22405-0001, letting boat owners cross over from that part number without changing pump housings or hardware.

Fitment covers Volvo Penta MB and MD engines, Westerbeke 8-10 kW generator sets, and Onan generators in the 5.0, 5.5, 6.0, 6.5, 7.5, and 9.0 kW range. Always confirm your engine or generator model against these applications before ordering, since impeller kits are not universal across pump families.

Specifications

• Brand: Johnson Pump
• Manufacturer Part Number: 09-808B-1
• Kit Contents: Impeller, o-ring, gasket, 7 grams impeller lubricant
• Material: MC97
• Outer Diameter: 1.58 inches
• Inner Diameter: 6 splines
• Width: 0.75 inches
• Weight: 0.1 pounds
• UPC: 7330717008734

Fitment

• Volvo Penta - MB, MD engines
• Westerbeke - 8-10 kW
• Onan - 5.0, 5.5, 6.0, 6.5, 7.5, 9.0 kW

Replaces (OEM)

• Jabsco 22405-0001

Frequently Asked Questions

What does the Johnson Pump 09-808B-1 kit include? The 09-808B-1 kit includes the impeller itself, an o-ring, a gasket, and 7 grams of impeller lubricant, so everything needed for a single impeller change is in one box.

Is the 09-808B-1 a direct replacement for Jabsco 22405-0001? Yes, the Johnson Pump 09-808B-1 is a direct replacement for Jabsco No 22405-0001.

What engines does the 09-808B-1 impeller kit fit? This kit fits Volvo Penta MB and MD engines, Westerbeke 8-10 kW generator sets, and Onan generators rated 5.0, 5.5, 6.0, 6.5, 7.5, and 9.0 kW.

What size is the impeller in the 09-808B-1 kit? The impeller has a 1.58 inch outer diameter, a 0.75 inch width, and a 6-spline inner diameter.

What material is the 09-808B-1 impeller made from? It is made from MC97 material, which is engineered specifically for cooling water applications in marine engines.

How much does the Johnson Pump 09-808B-1 weigh? The 09-808B-1 impeller kit weighs 0.1 pounds.

Does the 09-808B-1 kit come with lubricant for installation? Yes, 7 grams of impeller lubricant is included in the 09-808B-1 kit to help protect the impeller vanes during initial startup.

Can the 09-808B-1 impeller run dry? The 09-808B-1 is designed with minimized swelling and fatigue resistance for long service life, but like most rubber impellers it should be run with cooling water present rather than dry.

Why does the impeller need to be replaced periodically? Impellers such as the 09-808B-1 wear over time and can develop cracked or worn vanes, which reduces cooling flow; the kit's stable-pressure design and fatigue resistance are intended to extend the interval between replacements.

Does the 09-808B-1 kit include a gasket for the pump housing? Yes, a gasket is included along with the impeller, o-ring, and lubricant in the 09-808B-1 kit.

What is the UPC for the Johnson Pump 09-808B-1? The UPC for the Johnson Pump 09-808B-1 impeller kit is 7330717008734.