Yamaha F150A - Disassembling the Cylinder Block

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Crankcase
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Disassembling the cylinder block
1. Remove the crankcase “1”.
2. Remove the main bearing cap “1”.
3. Remove the connecting rod bolts “1” and
connecting rod caps “2”, and then
remove the piston and connecting rod
assemblies “3”.
TIP:
• To prevent mixing the piston and connect-
ing rod assemblies “3” and connecting rod
caps “2”, mark each with an identification
number “a” of the corresponding cylinder.
• Make sure to keep the parts in the order of
removal.
4. Remove the crankshaft “1”, crankshaft
journal bearings “2”, thrust bearing “3”,
and oil seal “4”.
5. Remove the collar “1”.
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