Johnson Pump F6B-9 Crankshaft Cooling Pump 10-24946-01, Replaces Indmar 68-5001, Fits 5.7L LTR/LT2/LT5

The Johnson Pump F6B-9 is a crankshaft-mounted engine cooling pump built as a direct OEM replacement for Indmar 68-5001, 685001-2, and 685001-4. It is engineered for select 5.7L Indmar LTR, LT2, and LT5 engines, including 250, 285, and 285R11 applications, where it circulates raw water to keep the engine running at proper operating temperature.

The pump mounts directly to the crankshaft pulley and uses a full 1/1 cam design with a lip seal to maintain consistent impeller compression and a reliable seal against water intrusion. It draws water through a 1-1/4 inch hose port. Because this is a self-priming, high-speed pump, it requires a stamped steel crankshaft pulley; it will not operate correctly if paired with a cast pulley, so confirm your pulley type before installing. The housing and internal components are built with marine-grade materials to hold up to continuous raw water exposure.

For maintenance, the pump uses the MC97 impeller kit 09-812BT-1 and service kit 09-45825, so replacement parts are readily available when it comes time to service the impeller or reseal the housing. This pump directly replaces the earlier Johnson Pump 10-24930-01, 10-24915-01, 10-24805-01, and 10-24232-1 part numbers, as well as Jabsco EU 22740-0000, making it a straightforward upgrade or replacement for boats already running one of those pumps.

Specifications

• Brand: Johnson Pump
• Manufacturer Part Number: 10-24946-01
• Pump Type: Flexible impeller cooling pump
• Mounting: Crankshaft pulley mount
• Cam Design: Full 1/1 cam with lip seal
• Port Size: 1-1/4 inch hose port
• Crankshaft Pulley Requirement: Stamped steel pulley required; not compatible with a cast pulley
• Impeller Kit: MC97 impeller kit 09-812BT-1
• Service Kit: 09-45825
• Material: Plastic
• Dimensions: 8 inches L x 6.5 inches W x 4.25 inches H
• Weight: 4.38125 pounds

Fitment

• 5.7L Indmar LTR
• 5.7L Indmar LT2
• 5.7L Indmar LT5
• 250, 285, and 285R11 applications

Replaces (OEM)

• Indmar 68-5001
• Indmar 685001-2
• Indmar 685001-4
• Johnson Pump 10-24930-01
• Johnson Pump 10-24915-01
• Johnson Pump 10-24805-01
• Johnson Pump 10-24232-1
• Jabsco EU 22740-0000

Frequently Asked Questions

What engines does the Johnson Pump 10-24946-01 fit? The Johnson Pump 10-24946-01 F6B-9 is built for select 5.7L Indmar LTR, LT2, and LT5 engines, including 250, 285, and 285R11 applications.

Is the F6B-9 pump a genuine OEM replacement for Indmar 68-5001? Yes, the Johnson Pump 10-24946-01 is designed as a direct OEM replacement for Indmar 68-5001, 685001-2, and 685001-4.

Does this pump require a specific type of crankshaft pulley? A stamped steel crankshaft pulley is required for the 10-24946-01. This self-priming, high-speed pump will not operate correctly if used with a cast pulley.

What size hose port does the F6B-9 use? The 10-24946-01 F6B-9 cooling pump has a 1-1/4 inch hose port.

How does this pump mount to the engine? It is a crankshaft pulley mount pump, meaning it attaches directly to the engine's crankshaft pulley rather than a separate bracket.

What impeller kit works with the 10-24946-01? The MC97 impeller kit 09-812BT-1 is the correct impeller kit for the Johnson Pump 10-24946-01 F6B-9.

Is there a service kit available for rebuilding this pump? Yes, service kit 09-45825 is used to service the Johnson Pump 10-24946-01.

What older Johnson Pump part numbers does this pump replace? The 10-24946-01 replaces Johnson Pump 10-24930-01, 10-24915-01, 10-24805-01, and 10-24232-1.

Does the 10-24946-01 cross-reference to a Jabsco part number? Yes, the Johnson Pump 10-24946-01 replaces Jabsco EU 22740-0000.

What is the pump housing made of? The F6B-9 pump, part number 10-24946-01, is built with marine-grade plastic materials designed for continuous raw water exposure.

What are the dimensions and weight of this pump? The Johnson Pump 10-24946-01 measures 8 inches long by 6.5 inches wide by 4.25 inches high and weighs 4.38125 pounds.

What seal design does the F6B-9 use to prevent leaks? The 10-24946-01 uses a full 1/1 cam design paired with a lip seal to maintain impeller compression and seal against water intrusion.