Sierra 18-3306 Neoprene Impeller, 12 Spline 8 Fin, Replaces Jabsco 920-0001
Sierra 18-3306 Neoprene Impeller, 12 Spline 8 Fin, Replaces Jabsco 920-0001
The Sierra 18-3306 is a neoprene water pump impeller built as a direct replacement for Jabsco 920-0001. It features a 12-spline hub design paired with 8 flexible neoprene fins, which engage the pump housing and drive shaft to circulate raw water through the cooling system. Neoprene construction is the standard material choice for marine impellers because it offers reliable flexibility and wear resistance under continuous water contact and rotational flexing.
This impeller is intended as a service replacement part for water pumps that use Jabsco 920-0001, restoring proper raw water flow when an impeller has worn, cracked, or lost fin memory. Installing a fresh impeller at the correct interval helps prevent overheating caused by reduced water flow through the pump. The kit ships as a single impeller unit ready to install into the corresponding pump housing.
Specifications
- Brand: Sierra
- Manufacturer Part Number: 18-3306
- Material: Neoprene
- Spline Count: 12 splines
- Fin Count: 8 fins
- Weight: 0.37 pounds
- Package Dimensions: 12.7 cm L x 11.43 cm W x 6.858 cm H
- Country of Origin: Italy
- UPC: 030999975690
Fitment
Fits water pumps designed for the Jabsco 920-0001 impeller.
Replaces (OEM)
- Jabsco 920-0001
Frequently Asked Questions
What does the Sierra 18-3306 impeller replace? The Sierra 18-3306 is a direct replacement for Jabsco 920-0001, so it installs in place of that impeller without modification.
What material is the 18-3306 impeller made from? It is molded from neoprene, the standard flexible rubber compound used for raw water pump impellers, which holds up to continuous water contact and repeated fin flexing.
How many splines and fins does this impeller have? The Sierra 18-3306 has a 12-spline hub and 8 fins.
How much does the 18-3306 impeller weigh? This impeller weighs 0.37 pounds.
Is the Sierra 18-3306 a genuine Sierra part or aftermarket? It is a Sierra-branded impeller, sold under Sierra's own part number 18-3306 as a replacement for Jabsco 920-0001.
Will this impeller fit any water pump? The 18-3306 is designed to fit pumps that use the Jabsco 920-0001 impeller; check your existing impeller's part number before ordering to confirm a match.
What is included when I order the 18-3306? The order includes one Sierra 18-3306 neoprene impeller.
How do I know if my impeller needs replacing? Cracked, torn, or stiff fins on the impeller, or reduced raw water flow from the engine, are signs the impeller should be replaced with a part such as the Sierra 18-3306.
Where is the Sierra 18-3306 impeller made? The country of origin listed for this impeller is Italy.
Does the 18-3306 use a specific spline count that I need to match? Yes, the 18-3306 uses a 12-spline hub, so it should only be used on pumps requiring that spline configuration, as with the Jabsco 920-0001 it replaces.