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4. Install the water pump alignment pins (91-821571A1) at this time to make sure that the water
pump top does not contact the drive shaft.
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5. Install the impeller key. Lightly lubricate the impeller with 2-4-C Marine Lubricant with Teflon
before installing over the shaft. If reusing the impeller, make sure that it is installed with the “vane
set” in the same direction as the unit turns to eliminate possible damage to the impeller vanes.
6. Reinstall the water pump top over the water pump alignment pins while turning the drive shaft
in the direction that the unit turns normally.
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7. With the alignment pins still in place, install two of the four water pump screws and torque to
60 lb. in. (6.7 N·m). Remove the alignment pins. Install the remaining screws and torque them
to 60 lb. in. (6.7 N·m).
