4 of 4
Apply Triple-Guard grease to a new impeller
O-ring. Slide the O-ring down the driveshaft and
half way over installed impeller key to temporarily
hold key in place.
The sharp edge of the key is the leading edge in
clockwise rotation.
Slide the water pump down the driveshaft. Align
impeller slot with the impeller key. Rotate the
driveshaft to engage the key with the impeller,
and slide water pump down over key. Be sure
impeller key does not fall out of position.
IMPORTANT: Make sure the impeller engages
the impeller key. Serious powerhead damage
will result if impeller key is not in place.
Align the impeller housing with the gearcase.
Apply Gasket Sealing Compound to threads of
the four impeller housing screws. Tighten the
screws to a torque of 60 to 84 in. lbs. (7 to 9.5
N·m).
After water pump is assembled completely,
rotate driveshaft counter clockwise 1/4 turn to
unlock and release impeller and key from
driveshaft.
Next, pull up on driveshaft and turn clockwise to
lock impeller to shaft. This process increases
pump efficiency by locking the impeller in a lower
position on the driveshaft.
IMPORTANT: Before installing gearcase, shift
rod adjustment MUST be checked. Refer to ap-
propriate Service Manual.
Install gearcase assembly on outboard. Refer to
appropriate Service Manual. Tighten gearcase
mounting screws to a torque of:
• 3/8 in. screws – 26 to 28 ft. lbs. (35 to 38 N·m)
• 7/16 in. screws – 45 to 50 ft. lbs. (61 to 68
N·m)
Start outboard to check water pump operation.
1. Impeller plate gasket
2. Impeller plate
3. O-ring
4. Impeller key
006871
1. Sharp edge of drive cam
2. Direction of driveshaft rotation
CO2995
3
4
1
2
2
1
007176
WARNING
Failure to properly tighten all gearcase
retaining screws can result in gearcase
loss and loss of boat control at high speed.
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