Jabsco 17938-0001-P Neoprene Impeller, Replaces Volvo D12/D13/D16, 3-3/4 Inch Diameter

The Jabsco 17938-0001-P is a neoprene water pump impeller built as a direct replacement for Volvo Penta D12, D13, and D16 engine cooling pumps. Neoprene construction gives the impeller a long working life under continuous engine cooling duty, resisting the wear that comes from constant rotation against the pump housing. The impeller kit includes lubricant and 2 O-rings along with installation instructions, so you have everything needed for a complete impeller change in one package.

This impeller uses a spline drive to engage the pump shaft and features 12 blades for consistent water flow through the cooling system. It measures 3-3/4 inches in diameter and 3-3/4 inches in width, with a 1 inch shaft diameter, matching the dimensions of the pump housing on Volvo D12, D13, and D16 engines. Replacing a worn impeller on schedule helps prevent overheating caused by reduced water flow, protecting the engine's cooling circuit.

Specifications

• Brand: Jabsco
• Manufacturer Part Number: 17938-0001-P
• Diameter: 3-3/4 inches
• Width: 3-3/4 inches
• Shaft Diameter: 1 inch
• Drive Type: Spline Drive
• Material: Neoprene
• Blades: 12
• Weight: 1.2 pounds
• Includes: Impeller, lubricant, 2 O-rings, installation instructions

Fitment

• Volvo Penta D12
• Volvo Penta D13
• Volvo Penta D16

Replaces (OEM)

• Volvo D12 3830663
• Volvo D12 3830459
• Volvo D13 3830459
• Volvo D16 3830459

Frequently Asked Questions

What engines does the Jabsco 17938-0001-P impeller fit? The 17938-0001-P is designed as a direct replacement impeller for Volvo Penta D12, D13, and D16 engine cooling pumps.

What OEM part numbers does this impeller cross-reference? This Jabsco impeller replaces Volvo D12 3830663, D12 3830459, D13 3830459, and D16 3830459, so any of those OEM numbers will match the 17938-0001-P.

What material is the 17938-0001-P impeller made from? It is made from durable neoprene, which is the standard material for marine water pump impellers because it holds up well to continuous wet running.

What is included with the 17938-0001-P impeller kit? The kit includes the neoprene impeller itself, lubricant for installation, 2 O-rings, and step-by-step installation instructions.

How many blades does this impeller have? The Jabsco 17938-0001-P has 12 blades.

What are the dimensions of the 17938-0001-P impeller? It measures 3-3/4 inches in diameter and 3-3/4 inches in width, with a 1 inch shaft diameter.

How does this impeller attach to the pump shaft? The 17938-0001-P uses a spline drive to engage and turn with the pump shaft.

How much does the 17938-0001-P impeller weigh? It weighs 1.2 pounds.

Do I need to grease the impeller before installing it? Yes, greasing the 17938-0001-P before installation makes it easier to insert into the pump bore and gives the impeller added protection during the initial prime.

How often should the impeller be replaced? As a wear item in the cooling system, the 17938-0001-P and similar impellers are generally replaced at least once a year or sooner depending on engine duty, and it is worth keeping a spare on board.

Is this a genuine Jabsco part or an aftermarket copy? The 17938-0001-P is a genuine Jabsco impeller, manufactured to replace the original Volvo D12, D13, and D16 cooling pump impeller.

What is the basic process for replacing this impeller? Installation involves removing the end cover screws, gasket, and old impeller, clearing debris from the pump chamber, lubricating the pump wall, inserting the new 17938-0001-P impeller with a twisting motion, then fitting the gasket and end cover and tightening the screws.