Johnson Pump F4 MC97 Impeller Kit 09-1026B-1 - Volvo Penta, Bukh, Fischer Panda Raw Water Pump

The Johnson Pump F4 MC97 Impeller Kit (part number 09-1026B-1) is a complete replacement kit for the Johnson Pump F4 raw water pump used on a range of marine diesel engines. The impeller is molded from a unique MC97 rubber compound engineered to hold strict tolerances for reliable performance, with a nitrile formulation that resists oil exposure and an MC97/neoprene composition suited to cooling water service. It is built to deliver stable pressure over time while minimizing swelling and the fatigue-related failures that cause worn or damaged impellers to lead to engine breakdowns.

Worn impellers are one of the most common causes of raw water pump failure and overheating, so replacing on schedule with a correctly sized part matters. This kit meets engine OEM requirements and comes as an all-in-one package: the impeller, two gaskets, and impeller lubricant are all included, so there is no need to source additional parts separately. The impeller offers self-priming capability to help the pump draw water at startup.

This kit is sized for the F4 pump only, with a 2.00 inch outer diameter, 0.50 inch inner diameter, and 0.87 inch width. It fits F4 pumps used on Bukh (Aabenraa) DV 20 and 24 ME/SME engines, Fischer Panda Panda PMS 6, 8, 10, and 12 engines, Iveco-Aifo KUB UNO M20 engines, Lombardini LDW 1003 M, 1204M, 1404M, 502M, 602M, 702M, and 903M engines, and a range of Volvo Penta engines listed below. Confirm your engine's pump size before ordering, since Johnson Pump also offers a larger F5 kit (2.25 inch outer diameter) for other applications.

Specifications

• Brand: Johnson Pump
• Manufacturer Part Number: 09-1026B-1
• Pump Model: F4
• Material: MC97 rubber compound (nitrile, oil-resistant)
• Outer Diameter: 2.00 inches
• Inner Diameter: 0.50 inches
• Width: 0.87 inches
• Includes: Impeller, gasket x 2, impeller lubricant
• Self-Priming: Yes
• UPC: 7330717008758
• Weight: 0.1 pounds

Fitment

• Bukh (Aabenraa) DV 20, 24 ME/SME
• Fischer Panda Panda PMS 6, 8, 10, 12
• Iveco-Aifo KUB UNO M20
• Lombardini LDW 1003 M, 1204M, 1404M, LDW 502M, 602M, 702M, 903M
• Volvo Penta MD 2030, MD 2040, D1-13, 20 A/B, D1-30, 40 A/B, D2-55 A/B/C/D/E, D2-75 A/B/C, AQ90, MD 3B, AQ 110/115, 115A/B, 120, 130, 130A/B, 130C/D, AQ140, AQ60F, AQ95A, VV100, BB115, BB115B/C, MD17C, 17D, 20B, 2GM 20F, 2QM 15/20, 3GM30F, 3HM/HM 35/HM 35F, 3QM 30

Replaces (OEM)

• Jabsco 673-0001

Frequently Asked Questions

What pump does the Johnson Pump 09-1026B-1 impeller kit fit? The 09-1026B-1 kit is sized specifically for the Johnson Pump F4 raw water pump, with a 2.00 inch outer diameter, 0.50 inch inner diameter, and 0.87 inch width. It is not interchangeable with the larger F5 pump, which uses a 2.25 inch outer diameter impeller.

What is included in the 09-1026B-1 impeller kit? The kit includes the MC97 impeller, two gaskets, and impeller lubricant, so everything needed for a complete F4 pump impeller replacement is in one package.

What material is the Johnson Pump F4 impeller made from? The impeller in kit 09-1026B-1 is molded from MC97, a nitrile-based rubber compound formulated for oil resistance and stable cooling performance, with minimized swelling and fatigue over time.

Does the 09-1026B-1 kit replace a Jabsco impeller? Yes, the Johnson Pump 09-1026B-1 impeller kit replaces Jabsco 673-0001 for engines using the corresponding F4-size raw water pump.

Which engines use the Johnson Pump F4 impeller kit 09-1026B-1? This kit fits Bukh (Aabenraa) DV 20 and 24 ME/SME engines, Fischer Panda PMS 6, 8, 10, and 12 engines, Iveco-Aifo KUB UNO M20 engines, Lombardini LDW 1003 M, 1204M, 1404M, 502M, 602M, 702M, and 903M engines, and the listed Volvo Penta MD and AQ series engines.

How often should the F4 impeller be replaced? Worn or damaged impellers can lead to engine breakdowns, so the Johnson Pump F4 MC97 impeller in kit 09-1026B-1 should be inspected and replaced on a regular service interval as part of routine raw water pump maintenance.

What are the dimensions of the 09-1026B-1 impeller? The impeller measures 2.00 inches in outer diameter, 0.50 inches in inner diameter, and 0.87 inches in width.

Is this a genuine Johnson Pump impeller kit? Yes, 09-1026B-1 is a genuine Johnson Pump F4 impeller kit, made to the MC97 material specification and dimensions required to match the F4 pump exactly.

What is the difference between the F4 and F5 Johnson Pump impeller kits? The F4 kit, 09-1026B-1, has a 2.00 inch outer diameter and 0.87 inch width, while the F5 kit uses a 2.25 inch outer diameter impeller. Confirm your pump model before ordering, since the two sizes are not interchangeable.

Does the 09-1026B-1 kit have self-priming capability? Yes, the F4 MC97 impeller in this kit is designed with self-priming capability to help the raw water pump draw water at startup.

How much does the Johnson Pump 09-1026B-1 impeller kit weigh? The 09-1026B-1 impeller kit weighs 0.1 pounds.