The Jabsco 18948-0001-P is the retail-packed version of the genuine Jabsco 18948-0001 neoprene impeller kit. This 12-blade, key-drive impeller measures 2-9/16 inches in diameter and 1-5/8 inches wide, with a brass insert bored for a 5/8 inch keyed shaft. It is a common raw water cooling impeller on marine inboard engines and generators and is used in Jabsco 42730-0000 series pumps.
Neoprene blades flex and seal against the pump body to create strong suction, which lets the pump self-prime and push a steady flow of cooling water through the engine. Over time the blades take a set, harden and crack, so replacing the impeller on a regular schedule is inexpensive insurance against overheating and a costly tow back to the dock.
Key Features
- Genuine Jabsco 18948-0001 impeller kit in retail packaging
- 12 flexible neoprene blades for dependable self-priming
- Brass insert with key drive for a solid connection to a 5/8 inch shaft
- Molded to exact Jabsco dimensions for correct fit and flow
- Good all-round compound for fresh and salt water service
Applications
- Raw water cooling pumps on marine inboard diesel and gas engines
- Marine generator seawater pumps using the 18948-0001 impeller
- Jabsco 42730-0000 series flexible impeller pumps
- Onboard spare for coastal and offshore cruising
Specifications
- Part Number: 18948-0001-P
- Packaging: Retail pack, single kit
- Impeller Material: Neoprene
- Number of Blades: 12
- Diameter: 2-9/16 in (65 mm)
- Width: 1-5/8 in (41.3 mm)
- Shaft: 5/8 in (16 mm)
- Drive Type: Key drive
- Insert: Brass
- Temperature Range: 45 to 180 F (7 to 82 C)
Frequently Asked Questions
Q: How do I know my impeller needs replacing?
Look for cracked, torn or missing blades, blades that stay bent in one direction, or a drop in water flow from the exhaust. Any of these means it is time for a new impeller.
Q: Do I need a special tool to remove the old impeller?
Many impellers can be removed with two screwdrivers or needle-nose pliers, but an impeller puller makes the job faster and protects the pump body.
Q: What if a blade broke off the old impeller?
Find every missing piece before running the engine. Fragments usually collect in the heat exchanger inlet or cooler and can block cooling flow.
Q: Is neoprene right for my raw water pump?
Neoprene is the standard choice for fresh and salt water cooling. Choose nitrile only when the pump will handle oil or fuel contaminated liquids.
Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct impeller kit.
CLRMarine
