Johnson Pump F4 MC97 Impeller Kit 2.00 Inch, Replaces Jabsco 18653-001, Fits Westerbeke and Yanmar

The Johnson Pump F4 MC97 Impeller Kit 2.00" is a raw water pump impeller kit engineered for marine engine cooling systems. Molded from Johnson Pump's MC97 compound, the impeller is built to deliver stable pressure over time, resist swelling, and reduce failures caused by fatigue, so it maintains correct cooling flow and sufficient cooling right from start up. The kit includes an o-ring, gasket, and 7 grams of impeller lubricant, giving you everything needed for a complete, ready-to-install replacement.

This F4 impeller measures 2.00 inches in outer diameter with a 0.87 inch width and a 6-spline inner diameter for a precise drive fit. It is built for excellent self-priming capability and correct impeller dimensions to match OEM cooling performance. It is designed to fit Westerbeke generators of 10 kW and up, and Yanmar engines from model year 97 including the 3GMF, 2GM, and 3GM. It replaces Jabsco No 18653-001, making it a straightforward cross-reference for engines currently running that part.

Specifications

• Brand: Johnson Pump
• Manufacturer Part Number: 09-810B-1
• Product Type: Impeller Kit
• Material: MC97
• Outer Diameter: 2.00 inches
• Inner Diameter: 6 splines
• Width: 0.87 inches
• Weight: 0.1125 pounds
• UPC: 7330717008741
• Kit Includes: O-ring, gasket, and 7 grams of impeller lubricant

Fitment

• Westerbeke generators, 10 kW and up
• Yanmar engines from model year 97: 3GMF, 2GM, 3GM

Replaces (OEM)

• Jabsco 18653-001

Frequently Asked Questions

What engines does the Johnson Pump 09-810B-1 impeller kit fit? The 09-810B-1 fits Westerbeke generators rated 10 kW and up, and Yanmar engines from model year 97 including the 3GMF, 2GM, and 3GM.

What OEM part number does this impeller replace? This kit replaces Jabsco No 18653-001, so it can be used as a direct cross-reference for engines currently fitted with that part.

What size is the 09-810B-1 impeller? It measures 2.00 inches in outer diameter and 0.87 inches in width, with a 6-spline inner diameter drive.

What material is the impeller made from? The 09-810B-1 impeller is molded from Johnson Pump's MC97 compound, formulated for cooling applications with resistance to swelling and fatigue-related failure.

What comes included in the kit? The Johnson Pump 09-810B-1 kit includes the impeller, an o-ring, a gasket, and 7 grams of impeller lubricant for installation.

Is this a genuine Johnson Pump part or an aftermarket copy? The 09-810B-1 is a genuine Johnson Pump impeller kit, manufactured to Johnson Pump's MC97 material specification rather than a generic aftermarket substitute.

How often should the impeller be replaced? Marine raw water pump impellers such as the 09-810B-1 are a wear item and are commonly replaced on an annual basis to maintain reliable engine cooling.

Will this impeller self-prime after installation? Yes, the 09-810B-1 is designed for excellent self-priming capability so the cooling system draws water promptly at start up.

Does the kit include the gasket needed for installation? Yes, a gasket is included with the 09-810B-1 kit along with the o-ring and impeller lubricant.

How much does the 09-810B-1 impeller kit weigh? The Johnson Pump 09-810B-1 impeller kit weighs 0.1125 pounds.

Does the 09-810B-1 fit Volvo Penta engines? No, the 09-810B-1 is designated for Westerbeke generators (10 kW and up) and Yanmar 3GMF, 2GM, and 3GM engines from model year 97; it is not listed for Volvo Penta applications.