Jabsco 18930-0020 Bronze Engine Cooling Pump
When an engine depends on a steady flow of raw water to stay cool, the pump doing that job needs to be built for the long haul, and that's exactly what the Jabsco 18930-0020 delivers. This bronze-bodied cooling pump is designed to move water reliably through demanding engine systems, using a flexible neoprene impeller and a carbon/ceramic mechanical seal to keep performance consistent even after years of service. Its bronze construction, paired with a stainless steel shaft, gives it the corrosion resistance needed to handle harsh operating environments without breaking down.
What sets this pump apart is its bare shaft design fitted with a 3/16" keyway, making it a straightforward fit for engines that call for a keyed drive connection rather than a pulley mount. The 1-1/4" ID hose ports keep plumbing simple, allowing for a clean connection into existing cooling lines without the need for extra adapters. It's a pump built with serviceability in mind, so routine maintenance and impeller replacement don't turn into a bigger job than they need to be.
This pump is commonly chosen as a direct replacement on Chris Craft engines and similar applications where the original Sherwood-style G-45-1 pump wore out or needs upgrading. Whether it's for a repower, a rebuild, or simply swapping out a tired original pump, the 18930-0020 offers dependable, self-priming performance that keeps an engine running at the right temperature, trip after trip.
Key Features
- Bronze body and bearing housing for corrosion resistance
- Stainless steel shaft with 3/16" keyway for keyed drive engines
- Neoprene flexible impeller for reliable self-priming operation
- Carbon/ceramic mechanical shaft seal for long service life
- Twin single-row ball bearings for smooth, durable rotation
- Self-priming from dry, with suction lift up to 22 feet (6.7m) when wetted
- May be mounted in any position
Applications
- Marine engine raw water cooling systems
- Chris Craft engine replacement pump applications
- Inboard engine cooling on recreational and light commercial vessels
- General industrial cooling loops requiring a flexible impeller bronze pump
- OEM and aftermarket pump replacement for keyed-shaft engine drives
Specifications
- Port Type: 1-1/4" (32mm) ID hose
- Body Material: Bronze
- Impeller: Neoprene
- Shaft: Stainless steel with 3/16" keyway
- Shaft Seal: Carbon/ceramic mechanical type
- Bearings: Twin single-row, ball type
- Nominal Flow Rate: Approximately 15 gallons/min (56.8 L/min) at 1,500 rpm
- Operating Temperature Range: 45°F to 180°F
- Maximum Recommended Output Pressure: 15 psi
- Maximum Inlet Vacuum: 5 inches of mercury
Frequently Asked Questions
Q: Can the Jabsco 18930-0020 be mounted in any orientation?
A: Yes, this pump can be mounted in any position, giving flexibility for different engine layouts and installation spaces.
Q: How long can this pump run without water before it's damaged?
A: The pump should never run dry for more than 30 seconds, since it relies on the pumped liquid for internal lubrication of the impeller.
Q: What is the maximum suction lift this pump can achieve?
A: Once wetted, the pump can produce a suction lift of up to 22 feet (6.7m), and it self-primes from dry up to 7.8 feet (2.4m).
Q: Does this pump come with a pulley already attached?
A: No, this version is a bare shaft pump with a 3/16" keyway, intended for direct keyed-shaft drive rather than pulley mounting.
Q: What temperature range is this pump rated for?
A: It's designed to handle liquids between 45°F and 180°F; pumping colder water can shorten impeller life over time.
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