Jabsco 18670-9407 Mastercraft Ballast Pump, 12V Reversible, 9 GPM, Replaces Mastercraft 300249

The Jabsco 18670-9407 Mastercraft Ballast Pump is a reversible pump built to both fill and empty a boat's ballast tank, giving wakeboard and wake surf boat owners control over ballast weight from a single pump. It moves approximately 80 pounds of ballast water every minute at a 9 GPM (34 LPM) flow rate, and its self-priming design lets it be mounted up to 3 feet above the water source. The pump is constructed with a bronze pump head paired with an oil-resistant nitrile impeller, giving it a long service life in continuous marine use. It runs on a nominal 12 VDC supply, draws up to 12A maximum current, and should be protected with a 20A fuse. Plumbing connects via a 1 inch hose barb or 1/2 inch NPT internal port. Beyond ballast duty, the same bronze-and-nitrile construction makes it suitable for bilge pumping, livewell circulation, draining bait tanks, engine oil changing, and washdown applications. The pump meets USCG 183.410 and ISO 8846 Marine ignition protection standards, making it safe for use in gasoline engine compartments. It is built as a direct functional replacement for the Mastercraft 300249 ballast pump, so it drops into systems designed around that part.

Specifications

• Brand: Jabsco
• Manufacturer Part Number: 18670-9407
• Category: Ballast Pumps
• Pump Type: Reversible (fill and empty)
• Flow Rate: 9 GPM (34 LPM)
• Ballast Fill Rate: Approximately 80 pounds of water per minute
• Nominal Voltage: 12 VDC
• Maximum Current: 12A
• Recommended Fuse: 20A
• Self-Priming: Up to 3 feet
• Port Size: 1 inch hose barb or 1/2 inch NPT internal
• Pump Head Material: Bronze
• Impeller Material: Oil-resistant nitrile
• Ignition Protection: USCG 183.410 and ISO 8846 Marine compliant
• Weight: 7.2 pounds
• UPC: 671880629003

Fitment

Designed as a functional replacement for the Mastercraft 300249 ballast pump.

Replaces (OEM)

• Mastercraft 300249

Frequently Asked Questions

What does the Jabsco 18670-9407 Mastercraft Ballast Pump replace? The Jabsco 18670-9407 is a direct functional replacement for the Mastercraft 300249 ballast pump.

Is this ballast pump reversible? Yes, the Jabsco 18670-9407 is a reversible pump, so it can both fill and empty a ballast tank rather than only pumping in one direction.

What flow rate does this pump deliver? It delivers a 9 GPM (34 LPM) flow rate, moving approximately 80 pounds of ballast water per minute.

What voltage does the Jabsco 18670-9407 run on? This pump runs on a nominal 12 VDC power supply, with a maximum current draw of 12A.

What size fuse should be used with this pump? A 20A fuse is recommended for the Jabsco 18670-9407 Mastercraft Ballast Pump.

How far above the water source can this pump be mounted? Because it is self-priming, the Jabsco 18670-9407 can be mounted up to 3 feet above the water source.

What is the pump head and impeller made of? The pump has a bronze pump head paired with an oil-resistant nitrile impeller, giving it durability for continuous marine use.

Is this ballast pump ignition protected for gasoline engine compartments? Yes, the 18670-9407 meets USCG 183.410 and ISO 8846 Marine ignition protection standards, making it safe for gasoline engine bilge and ballast applications.

What plumbing connections does this pump use? The Jabsco 18670-9407 connects via a 1 inch hose barb or a 1/2 inch NPT internal port.

Can this pump be used for anything besides ballast? Yes, in addition to ballast fill and empty duty, the bronze-and-nitrile construction of the 18670-9407 also suits bilge pumping, livewell circulation, draining bait tanks, engine oil changing, and washdown applications.

How much does the Jabsco 18670-9407 Mastercraft Ballast Pump weigh? The pump weighs 7.2 pounds.