Johnson Pumps 10-24949-01 F4B-9 Flexible Impeller Engine Cooling Pump

The Johnson Pumps F4B-9 flexible impeller pump provides an efficient and reliable solution for marine engine cooling and raw water pumping applications. This OEM-quality pump is designed to handle the demanding conditions of marine environments with proven performance and durability.

Key Features:

• Self-priming design lifts water up to 3 meters (10 feet) without manual priming
• Flexible neoprene impeller creates vacuum as vanes depress and rebound, drawing fluid efficiently
• Can pass fairly large solids without clogging or damage, reducing filtration requirements
• Engineered for raw water and freshwater cooling applications
• Does not require installation below the waterline due to self-priming capability
• Easily replaceable wearing parts for simplified maintenance
• Uses impeller kit 09-810B-1 for service replacement

Important Operating Note: Like all flexible impeller pumps, this unit depends on water for lubrication of the impeller and seals. Do not run dry for more than 30 seconds to prevent damage. Regular impeller replacement is recommended as part of routine maintenance to ensure reliable engine cooling system performance.

This pump is compatible with various marine engines including Nanni diesel engines and serves as a direct replacement for Johnson Pump part numbers 10-35127-1 and 10-35127-6, Nanni Diesel 538.012.1, and Fischer Panda 30105.