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Need impeller help

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I have a 1990 malibu sunsetter, and need to know which impeller I need. It has the 5.7 mercruiser engine. Thanks in advance for any help!

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I ordered the one on skidim that is for the older mercruisers, as mine has the d shaped shaft, and many others looked like they were for spline shafts. My next question, is there a definite front or back to the impeller, or will it work either way?

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Good deal. Works either way. If you put it in yourself good luck. I've wrecked a few trying to get the pressure right. Too loose they leak, too tight and you burn up the housing or impeller.

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