TOHATSU 40 Service Manual page 151

SECTION 6
Propeller and Shaft
• Verify the propeller is true and free of nicks, chips, and other
damage that will affect performance. Inspect the thrust washer
and mounting hardware for damage.
• Check the propeller shaft threads and splines for wear and
damage.
Propeller Shaft Housing
Examine propeller shaft housing and components for wear,
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damage, and deterioration. And repair as needed. See
Gearcase Repair Procedures, this section.
Driveshaft
• Check driveshaft threads and splines forwear, chips, and cracks.
Severe spline wear or the appearance of spline "twisting"
indicates the gearcase has been distorted, possibly by impact
damage.
• Bearing(s) must be free of damage, corrosion, and discoloration.
Replace bearing(s) as required. See Gearcase Repair Procedures,
this section.
All Internal Components
Inspect all internal components for signs of wear, chipping, pitting,
distortion, and discoloration due to improper lubrication. Special
attention to the following:
• Check the bevel gear A tapered roller bearing outer race. If
damaged or corroded, replace both the race and the bearing.
See Gearcase Repair Procedures in this section.
• Inspect clutch and gear teeth and the clutch cam for chips and
signs of metal transfer. Replace parts as needed.
Assembly
Gearcase must be secured in a suitable holding
fixture during assembly.
1. Install new gearcase needle bearing, bevel gear A roller bearing
and outer race, and driveshaft bearing(s) if any of these parts were
removed. See Gearcase Repair Procedures, this section.
2. Secure gearcase in holding fixture with water pump side facing
upward.
3. Slide the driveshaft spring onto the driveshaft so
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flat side (1) faces threaded end of driveshaft. Position
the spring exactly as shown so flat side (1) is seated against
shoulder (2).
The driveshaft spring provides oil lubrication to
the tapered roller bearing(s) under the lower
water pump case. If spring is installed too high,
oil supply may be insufficient.
6-14
CAUTION
CAUTION
T1381
T1382
T1383
3-/ 4-Cylinder