TOHATSU BFT250A Service Manual page 335

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Install a new impeller gasket [1] and impeller cover [2].
Apply marine grease to the pump liner [1] inner surface.
Install the pump liner in the impeller housing [2] by
aligning the two projections [3] on the pump liner with
the two grooves [4] in the impeller housing.
Be sure that part "A" [5] of the pump liner is in alignment
with part "B" [6] of the impeller housing.
Apply marine grease to a new water pump O-ring [1]
and install it into the impeller housing [2].
COOLING SYSTEM
[1]
[7]
[3]
[5]
[1]
[2]
[4]
[2]
[6]
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