Yamaha 30D - POWER UNIT

E
POWR
CHAPTER 5
POWER UNIT
EXPLODED DIAGRAM .................................................................................... 5-1
PREPARATION FOR OVERHAUL ............................................................ 5-2
REMOVAL ....................................................................................................... 5-2
DISASSEMBLY ............................................................................................... 5-3
INSPECTION ................................................................................................... 5-4
CYLINDER HEAD...................................................................................... 5-4
Cleaning ............................................................................................. 5-4
Inspection........................................................................................... 5-4
CYLINDER BLOCK.................................................................................... 5-5
Cleaning ............................................................................................. 5-5
Inspection........................................................................................... 5-5
PISTON ..................................................................................................... 5-6
Cleaning ............................................................................................. 5-6
Inspection........................................................................................... 5-6
PISTON RING ........................................................................................... 5-7
Inspection........................................................................................... 5-7
PISTON PIN AND SMALL END BEARING .............................................. 5-8
Cleaning ............................................................................................. 5-8
Inspection........................................................................................... 5-8
CRANKSHAFT .......................................................................................... 5-8
Inspection........................................................................................... 5-8
REED VALVE............................................................................................. 5-9
Inspection........................................................................................... 5-9
THERMOSTAT.......................................................................................... 5-9
Cleaning ............................................................................................. 5-9
Inspection........................................................................................... 5-9
CRANK MAIN BEARING ........................................................................ 5-10
Cleaning ........................................................................................... 5-10
Inspection......................................................................................... 5-10
DRIVE GEAR
(OIL INJECTION PUMP DRIVE) ............................................................ 5-10
DRIVEN GEAR
(OIL INJECTION PUMP DRIVE) ............................................................ 5-10
Inspection......................................................................................... 5-10