1983 Yamaha 30EN Outboards Service Manual, Page 73Get this manual
bBolt the oil seal housing to the bottom of the cylinder bodyTightening torqueNm (0.8kg, 5.8 ft lb)
1 Oil seal housing
2 Gasket
eInstall the anode in the water jacket
cInsert the crankshaft into the engine stand which was used in disassembling the engine
Cylinder head Make sure the mating surface of the cylinder body with the cylinder head is free of dust, and install the cylinder head gasket and cylinder head on the cylinder, then tighten the boltsdInstall the gasket, and install the crank upper oil seal housing