TOHATSU NB-1000 Service Manual page 161

3. Slide the impeller down the driveshaft onto lower pump case.
4. Insert impeller key (4) in driveshaft and align impelIer slot
21
with key. Hold the impeller key in place and push impeller
down until seated in position.
5. Lubricate the impeller blades with soapy water and slide upper
22
pump case down driveshaft. Hold pump case securely and push
downward while rotating driveshaft clockwise to seat the impeller.
Do not rotate driveshaft counterclockwise. Doing
so will bend impeIIer blades in wrong direction
and may weaken or damage the impeller.
6. Ensure upper pump case is aligned and fuIIy seated on the
dowel pins. Hold the upper pump case in position and rotate
driveshaft clockwise to ensure free movement.
Make sure impeller blades are not caught or
pinched between upper and lower pump cases
when upper pump case is fully seated.
7. Apply genuine grease or equivalent friction surface marine
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grease to neck portion of water pump mounting bolts. Install
the bolts.
8. lnstall the gearcase. See Gearcase, this section.
1-/ 2-Cylinder
CAUTION
CAUTION
GEARCASE
T1357
T1358
T1359
6-9