1983 Yamaha 30EN Outboards Service Manual, Page 163Get this manual
Item Connecting rod big end side clearance "C" Small end free play limit "D" CarburetorStamped mark Choke bore Venturi bore Main bore Main nozzle Main jet Main air jet Pilot outlet Pilot jet Pilot air jet Bypass Bypass Pilot screw (turn out) Throttle valve angle Valve seat size Float level (gauge) Idling speed Trolling speed Reed valveThickness Valve lift Bending limit
30ESN30ELN 0.000.00 mm (0.0000.000 in) mm (0 .08 in) 68972 38 mm 25 mm 32 mm 3.4 Dia #135 #100