TOHATSU BFT 250A, Service Manual

Page: 331 / 639

11-9
dummyhead dummyhead
COOLING SYSTEM
WATER PUMP REMOVAL/
INSTALLATION
REMOVAL
Remove the following:
Standard rotation type
– Propeller (page 16-6)
– Gear case (page 16-8)
Counter rotation type
– Propeller (page 17-5)
– Gear case (page 17-7)
Remove the water tube seal ring [1] from the impeller
housing [2].
Remove the four impeller housing bolt/washers (8 x 60
mm) [3], four distance collars [4], and impeller housing.
Remove the special key [5] from the vertical shaft [6].
• Check the special key and key groove of the vertical
shaft for wear; replace them if necessary.
Remove the water pump O-ring [7] from the impeller
housing.
Remove the pump impeller [1] and pump liner [2] from
the impeller housing [3].
Check the impeller for cracks, wear, or damage from
overheating; replace them if necessary.
Check the pump liner for cracks or wear; replace it if
necessary.
Check the impeller housing for deformation; replace it if
necessary.
Remove the impeller cover [1] and the impeller gasket
[2].
[3]
[4]
[2]
[1]
[6]
[7] [5]
[3]
[1]
[2]
[1]
[2]