Yamaha 20C Owner's Manual

Also see for 20C: Service manual Owner's manual

4-25EML40010CHECKING BOLTS AND NUTS1) Check that bolts securing the cylinderhead and engine and the nut securingthe flywheel are tightened with theirspecified tightening torques.2) Check the tightening torques of otherbolts and nuts.GBEMK78010CHECKING WIRING ANDCONNECTORS1) Check that each grounding wire isproperly secured.2) Check that each connector is engagedsecurely.EXHAUST LEAKAGEStart the engine and check that noexhaust leaks from the joints between theexhaust cover, cylinder head and crankcase.WATER LEAKAGEStart the engine and check that no waterleaks from the joints between the exhaustcover, cylinder head and crank case.