Impeller for Suzuki outboard engines
The impeller is a flexible impeller in the water pump of the outboard motor. When the engine is running, the impeller rotates and draws in water via the water intake in the underwater part. This water is then pumped through the engine's cooling system.
The water pump uses the change in volume between the impeller and the pump housing to generate water pressure and circulate cooling water through the engine.
Part of the cooling system
The cooling system of a Suzuki outboard engine consists of several components:
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Water pump with impeller
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Water intake in the underwater part
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Cooling channels in the engine block
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Thermostat
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Water pipes and outlet
The impeller ensures that cooling water is continuously transported through the engine and that the operating temperature remains stable.
Wear and maintenance
Impellers are made of flexible rubber and are one of the typical wearing parts of an outboard motor. Operation, ageing or dry running can cause the blades to deform or break. A damaged impeller reduces the delivery rate of the water pump and can cause the engine to overheat.
Many manufacturers recommend regular inspection or replacement of the impeller as part of engine maintenance.
Selecting the right impeller
A suitable impeller is selected via:
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Suzuki engine series (e.g. DF series)
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Engine power (HP)
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Year of manufacture
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Suzuki part number
The impeller size, hub shape and diameter differ depending on the engine generation.
