TOHATSU BFT250A Service Manual page 432

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CYLINDER BLOCK
Clean the mating surfaces between the upper main
bearing [1] and cylinder block [2] with a degreasing
cleaning agent.
Apply molybdenum disulfide oil to the crankshaft mating
surface of the upper main bearing.
Install the four upper main bearings onto the cylinder
block by aligning the tab [3] of the main bearing with the
groove [4] of the cylinder block.
Apply molybdenum disulfide oil to the crankshaft [5]
main bearing journal, crankpin, thrust washer contact
surfaces.
Install the crankshaft [4] onto the main bearings.
Apply molybdenum disulfide oil and install the two
thrust washers [1] in the No.3 journal so that the
grooves [2] are facing out.
15-18
[1]
[4] [3]
[2]
[2]
[5]
[1]