1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 9Get this manual
General Specifications Model 3040
CARBURETOR SPECIFICATIONS Idle RPM Full Throttle RPM RangeModel 30 40 Sea ProMarathonModel 40 Idle Mixture Screw Adjustment (PresetTurns Out) Float Level Main Jet30 Manual (WME-3636A)(WME-63)30 Electric (WME-3737A)(WME-64)40 Manual (WME-38)(WME-66)40 Electric (WME-3939A)(WME-67)30 EHO (WME-4242A)(WME-65) TIMING SPECIFICATIONS Models with (SN-0G59999Below) Idle Maximum BTDC 2500-5500 RPM Models with (SN-0G590000Above) Idle Maximum Spark Advance 700800 PM (In orward ar) 45005500 PM 50005500 PM 1-12 14 (All Models xcept 40 MLL) 1-34 14 (WM E-38 arb on 40 MLL) 916 in(14.29mm) 0.054 0.054 0.066 0.066 0.054 ininininin