Johnson Pump CM10P7-1 12V Marine Circulation Pump, 4 GPM, Part 10-24501-03

The Johnson Pump CM10P7-1 is a heavy duty, magnetically driven circulation pump built for continuous-duty water and antifreeze circulation aboard boats and RVs. Compact but powerful, it is designed for circulation duties such as moving water or antifreeze through heating systems, or circulating cooling fresh water in closed-loop systems. As a normal-priming centrifugal pump, the CM10P7-1 must be mounted so it is always flooded, or primed before switching on, for reliable operation.

Construction pairs a PPA thermoplastic pump body and impeller with a stainless steel shaft for corrosion resistance and long service life in wet, marine environments. The pump runs on 12 volts, draws 14 watts of input power, and delivers 4 GPM of flow against a maximum system pressure of 2.5 bar (36 psi). It accepts either 5/8 inch or 3/4 inch hose at the port and mounts to a separate universal bracket for flat surfaces, keeping installation flexible across different equipment layouts. The pump tolerates liquid temperatures from -40 degrees F up to 212 degrees F, and can run dry for up to 30 minutes without damage, adding a margin of safety if the system briefly loses prime.

Compact dimensions of 6.97 inches long, 2.68 inches wide, and 3.35 inches high let the CM10P7-1 fit into tight equipment spaces typical of marine heating and cooling installations.

Specifications

• Brand: Johnson Pump
• Manufacturer Part Number: 10-24501-03
• Model: CM10P7-1
• Voltage: 12 Volts
• Port Size: 5/8 inch or 3/4 inch hose
• Capacity: 4 GPM
• Input Power: 14 Watts Max
• Minimum Liquid Temperature: -40 degrees F
• Maximum Liquid Temperature: 212 degrees F
• Dry Running: 30 minutes max
• System Pressure: 2.5 bar max (36 psi)
• Length: 6.97 inches
• Width: 2.68 inches
• Height: 3.35 inches
• Weight: 1.5 pounds
• Pump Body Material: PPA, Thermoplastic
• Shaft Material: Stainless Steel
• Impeller Material: PPA, Thermoplastic
• Mounting: Separate universal bracket for flat surfaces
• UPC: 7330717000585

Fitment

This is a universal-mount circulation pump for water and antifreeze heating/cooling circuits; it is not tied to a specific engine or vessel model, and mounts via a separate universal bracket to flat surfaces.

Replaces (OEM)

No OEM cross-reference numbers are published for this part number.

Frequently Asked Questions

What is the Johnson Pump CM10P7-1 used for? The CM10P7-1 (part 10-24501-03) is a magnetically driven circulation pump used to move water or antifreeze through heating systems, or to circulate cooling fresh water in a closed-loop system on a boat or RV.

Does this pump run on 12 volts or 24 volts? The CM10P7-1, part 10-24501-03, is a 12 volt pump drawing up to 14 watts of input power.

How much flow does the CM10P7-1 produce? This pump delivers a capacity of 4 GPM against a maximum system pressure of 2.5 bar (36 psi).

What hose sizes fit the port on this pump? The 10-24501-03 accepts either 5/8 inch or 3/4 inch hose at its port connection.

Can the pump run dry without being damaged? Yes, the CM10P7-1 is rated to run dry for up to 30 minutes maximum, which provides a safety margin if the circuit briefly loses prime.

Does this pump need to be self-priming? No, the CM10P7-1 is a normal-priming centrifugal pump, so it must be mounted so it stays flooded at all times, or be manually primed before it is switched on.

What materials are the pump body and impeller made from? The pump body and impeller on the Johnson Pump 10-24501-03 are made from PPA thermoplastic, while the shaft is stainless steel for corrosion resistance.

What is the operating temperature range of this pump? The CM10P7-1 handles liquid temperatures from -40 degrees F up to 212 degrees F.

How is the CM10P7-1 mounted? This pump mounts using a separate universal bracket designed for flat surfaces, giving flexibility in installation location.

What are the physical dimensions of this pump? The 10-24501-03 measures 6.97 inches in length, 2.68 inches in width, and 3.35 inches in height, and weighs 1.5 pounds.

Is the CM10P7-1 the same as the higher-output CM30P7-1? No, the CM10P7-1 (10-24501-03) is rated at 4 GPM and 14 watts, while the CM30P7-1 is a higher-output version of the Johnson Pump CM series rated at 5.3 GPM and 27 watts for larger circulation needs.

Are there OEM cross-reference numbers for this part? No OEM replacement or cross-reference numbers are published for the Johnson Pump 10-24501-03 CM10P7-1.