TOHATSU 40 Service Manual page 109

4. If oil pump drive gear (8) and lower main bearing (9) were
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removed, coat lower end of crankshaft with genuine engine
oil or TC-W3 oil and install the lower crankshaft components in
order, press fitting the gear and bearing onto the crankshaft. Make
sure snap ring (10) is properly seated.
On models 80, 90, 115, 120, 140, measure the end
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gap between oil pump drive gear (8) and snap ring
(10) with all lower crankshaft components properly
seated. If end gap exceeds 0.004 in [0.09 mm], install
correct size shim (11).
Pistons
5. Install each piston ring in its original groove on its original
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piston using the piston ring tool (Part No. 353-72249-0).
Each ring must be installed so end notches (12) fit the contour of
piston knock (13) when the ring is compressed.
6. Install each piston on its respective connecting rod as follows:
Each piston must be installed so [UP] mark (14)
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points to the flywheel end. Use the same piston pin
tool as was specified for disassembly.
3-/ 4-Cylinder
NOTE
NOTE
POWERHEAD
T1239
T1240
T1242
4-35