Sierra 18-8950 Impeller, Replaces Yanmar 124223-42092, Fits 2GM20F 3GM30F 3HM Diesel Engines

The Sierra 18-8950 is a replacement water pump impeller engineered for Yanmar diesel engines, designed to keep raw water circulating through the engine's cooling system so it runs at proper operating temperature. The impeller is the wear component inside the raw water pump; its flexible vanes flex as they rotate to draw in and push cooling water through the engine, and like all rubber impellers it should be inspected and replaced on a routine schedule to prevent overheating and pump housing damage from a cracked or worn-out unit.

This impeller is manufactured to OEM-approved specifications and cross-references directly to Yanmar part number 124223-42092, making it a direct fit replacement for the factory impeller on a wide range of Yanmar marine diesel engines. It is finished in red for easy identification during service. The 18-8950 is sold as the impeller only, ready to install into the existing raw water pump housing.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-8950
• Color: Red
• Weight: 0.09 pounds
• Package Dimensions: 3.9 L x 10 W x 11.5 H (Centimeters)
• Manufacturer: Teleflex
• UPC: 808282303778
• Replaces (OEM): Yanmar 124223-42092
• Fitment: 2GM20F, 2GMF, 2QM, 2QM20, 3GM30F, 3GMF, 3HM, 3HM35, 3HM35F, 3HMF, 3QM30, 3QM30F

Fitment

• Yanmar 2GM20F
• Yanmar 2GMF
• Yanmar 2QM
• Yanmar 2QM20
• Yanmar 3GM30F
• Yanmar 3GMF
• Yanmar 3HM
• Yanmar 3HM35
• Yanmar 3HM35F
• Yanmar 3HMF
• Yanmar 3QM30
• Yanmar 3QM30F

Replaces (OEM)

• Yanmar 124223-42092

Frequently Asked Questions

What engines does the Sierra 18-8950 impeller fit? The Sierra 18-8950 impeller fits Yanmar 2GM20F, 2GMF, 2QM, 2QM20, 3GM30F, 3GMF, 3HM, 3HM35, 3HM35F, 3HMF, 3QM30, and 3QM30F diesel engines.

What OEM part number does the 18-8950 replace? It replaces Yanmar part number 124223-42092, so it is a direct equivalent for that factory impeller.

What color is the 18-8950 impeller? It is red.

How much does the Sierra 18-8950 impeller weigh? The impeller weighs 0.09 pounds.

What are the package dimensions of the 18-8950? The packaged impeller measures 3.9 L x 10 W x 11.5 H in centimeters.

Is the 18-8950 a genuine Sierra part or an aftermarket copy? The 18-8950 is a genuine Sierra impeller manufactured to OEM-approved specifications, not a generic aftermarket clone.

Does the 18-8950 come with a warranty? Yes, Sierra part 18-8950 is covered by a limited warranty.

What is included when you order the 18-8950? The order includes the Sierra 18-8950 impeller itself; no additional gaskets or hardware are included.

Will the 18-8950 fit a Yanmar 1GM or 1GM10? No. The Yanmar 1GM and 1GM10 use a different Sierra impeller, part number 18-8951, not the 18-8950.

What is the UPC for the Sierra 18-8950 impeller? The UPC for the Sierra 18-8950 impeller is 808282303778.

How do I know when to replace the impeller on my Yanmar engine? Impellers like the Sierra 18-8950 are wear items and should be inspected regularly and replaced if the rubber vanes show cracking, chunking, or set, since a failed impeller can cause the Yanmar engine to overheat.

Is the Sierra 18-8950 impeller compatible with both gas and diesel Yanmar engines? The 18-8950 is fitted to the Yanmar diesel engine models 2GM20F, 2GMF, 2QM, 2QM20, 3GM30F, 3GMF, 3HM, 3HM35, 3HM35F, 3HMF, 3QM30, and 3QM30F.