1983 Yamaha 30EN Outboards Service Manual, Page 76Get this manual
2COl magneto aSlip the COl magneto over the boss located between the cylinder and crankcase so that the throttle cam is positioned on the carburetor sideNext, align the bolt hole in the friction plate with the hole in the magneto base, and screw in the bolt dLock the flywheel rotor with the washer and nutTightening torque160 Nm (16 mkg, 115 ft lb)
Place the flywheel cover on the flywheel, and secure it with the three boltsbFit the woodruff key in the crankshaft