Carburetor Specifications - Mercury FourStroke 2.5 Service Manual

Carburetor and Fuel Pump

Carburetor Specifications

Venturi
Throttle bore
Main jet
Main nozzle I.D.
Slow jet
Idle air jet
Idle speed (neutral)
Idle speed (forward)
Float level (flange to float bottom)
Pilot (idle mixture) screw
Venturi
Throttle bore
Main jet
Main nozzle I.D.
Slow jet
Idle air jet
Idle speed (neutral)
Idle speed (forward)
Float level (from carburetor flange to bottom of float)
Pilot (idle mixture) screw
Page 3A-2
Carburetor Specifications 2.5 HP
Carburetor Specifications 3.5 HP
9 mm (0.35 in.)
16 mm (0.63 in.)
#65
1.4 mm (0.06 in.)
#38
#115
1400 ± 50 RPM
1300 ± 50 RPM
10 mm (0.39 in.)
2 ± ½ turn out
13 mm (0.51 in.)
19 mm (0.75 in.)
#68
1.8 mm (0.07 in.)
#38
#115
1400 ± 50 RPM
1300 ± 50 RPM
10 mm (0.39 in.)
2 ± ½ turn out
90-8M0065421 NOVEMBER 2012