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Where is the impeller located on a 1973 Johnson 6 horsepower outboard motor?


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2007-12-17 13:24:45
2007-12-17 13:24:45

The impeller is located inside the water pump housing, on the topside of the gearcase. The gearcase will have to be removed in order to service it.

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The water pump impeller on a 7.5 hp Mercury outboard, is located on top of the gearcase, and is driven by the driveshaft.

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The 15 horsepower Mercury outboard motor does not have a water pump. The outboard motor is air cooled and does not have a need for circulating water.

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Generally no. You do not want to run an impeller dry, so normally you will apply a light coat of grease to the impeller when you install it. On an outboard engine the impeller is on top of the gearcase and below the surface of the water so it will get water as soon as you start to crank the engine. On a sterndrive or inboard engine the pump can be located on the engine, but it is often mounted low (near the water level). If you crank the engine without starting it the impeller will "prime" itself.

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The service manual is located at the related link below.

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The impeller in a Volvo Penta is located inside the water pump. You will need to first remove the water pump to access it.


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