Johnson Pump F5B-9 Impeller Pump OEM Flange Mount for Marine Engine Cooling

F5B-9 Impeller Pump OEM - Flange Mount

Flexible impeller pumps, F-series, provide an efficient solution to most raw water pumping needs. The primary advantage of a flexible impeller pump is its self-priming ability. As the vanes of the impeller are depressed and rebound, they create their own vacuum drawing fluid into the pump. A dry pump can lift the water up to as much as 3 meters. Thus a flexible impeller pump being used for engine cooling needs not to be located below the water line or manually primed. An added feature of flexible impeller pumps is that they can pass fairly large solids without clogging or damaging the pump. This reduces the need for filtering the incoming fluid. For general raw or freshwater applications, the standard long-lasting neoprene rubber impeller is used. Both the impeller and the seals depend upon the water for lubrication and will soon burn out if run dry.

Features:

• Crankshaft style cooling pump featured on older style small block GM marine engines such as: American Diesel Bomac Marine


• Easy to access impeller design


• A general feature of all flexible impeller pumps is that they cannot be permitted to run dry for more than 30 seconds


• Wearing parts are easily replaceable for all standard models

Applications:

• Engine cooling raw water handling


• Freshwater handling

Specifications:

• Port size: (inch) 3/4" NPT


• Mount Type: Flange


• CAM: Full 1/1


• shaft: Mechanical


• Material: Bronze

Cooling Capacity:

The required output of the cooling pump raw water as well as fresh water handling is related to:

• Engine type: (gasoline or diesel)


• Type of cooling system (size of heat exchanger)


• Water cooled engine oil, reverse gear, exhaust system

*Sold as an Individual

The Johnson Pump F5B-9 Impeller Pump OEM with flange mount is an essential component for efficient raw water and freshwater handling in marine engine cooling systems. Designed with a flexible impeller, this pump offers reliable self-priming capability, allowing it to lift water up to approximately 10 feet without manual assistance. Its ability to pass large solids prevents clogging and reduces maintenance needs, making it ideal for demanding marine environments. Constructed from durable bronze, the pump ensures long-lasting performance even under continuous operation. The easy-to-access impeller design facilitates quick replacements, minimizing downtime during maintenance. This pump is compatible with a range of engine types, including gasoline and diesel, and is suitable for applications where raw water cooling is required. The flange mount and 3/4-inch NPT port size simplify installation on various engine setups. The pump’s operation depends heavily on water lubrication, emphasizing the importance of avoiding dry run conditions to prevent damage to the impeller and seals. Its versatile design makes it suitable for engine cooling, raw water handling, and freshwater transfer in marine and industrial settings. Proper selection of the pump's output capacity depends on factors such as engine type, heat exchanger size, and additional cooling system components. The Johnson Pump F5B-9 is sold individually and provides a dependable solution for maintaining optimal engine temperatures and fluid transfer needs in marine applications.

Features:

• Crankshaft style cooling pump used on older small block GM marine engines such as American Diesel and Bomac Marine

• Easy-to-access impeller design for straightforward maintenance

• Cannot run dry for more than 30 seconds to prevent damage

• Wearing parts are easily replaceable for all standard models